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TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
name: "build" on: pull_request: schedule: - cron: "0 0 * * *" # Run everyday jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: "3.9" - uses: actions/cache@v2 with: path: ~/.cache/pip key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }} - name: Install dependencies run: | python -m pip install --upgrade pip setuptools six wheel python -m pip install mypy pytest-cov -r requirements.txt - run: mypy . # See `mypy.ini` for configuration settings. - name: Run tests run: pytest --doctest-modules --ignore=project_euler/ --ignore=scripts/validate_solutions.py --cov-report=term-missing:skip-covered --cov=. . - if: ${{ success() }} run: scripts/build_directory_md.py 2>&1 | tee DIRECTORY.md
name: "build" on: pull_request: schedule: - cron: "0 0 * * *" # Run everyday jobs: build: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - uses: actions/setup-python@v2 with: python-version: "3.9" - uses: actions/cache@v2 with: path: ~/.cache/pip key: ${{ runner.os }}-pip-${{ hashFiles('requirements.txt') }} - name: Install dependencies run: | python -m pip install --upgrade pip setuptools six wheel python -m pip install mypy pytest-cov -r requirements.txt - run: mypy --ignore-missing-imports --install-types --non-interactive . - name: Run tests run: pytest --doctest-modules --ignore=project_euler/ --ignore=scripts/validate_solutions.py --cov-report=term-missing:skip-covered --cov=. . - if: ${{ success() }} run: scripts/build_directory_md.py 2>&1 | tee DIRECTORY.md
1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
name: pre-commit on: [push, pull_request] jobs: pre-commit: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - uses: actions/cache@v2 with: path: | ~/.cache/pre-commit ~/.cache/pip key: ${{ runner.os }}-pre-commit-${{ hashFiles('.pre-commit-config.yaml') }} - uses: actions/setup-python@v2 - uses: psf/[email protected] - name: Install pre-commit run: | python -m pip install --upgrade pip python -m pip install --upgrade pre-commit - run: pre-commit run --verbose --all-files --show-diff-on-failure
name: pre-commit on: [push, pull_request] jobs: pre-commit: runs-on: ubuntu-latest steps: - uses: actions/checkout@v2 - uses: actions/cache@v2 with: path: | ~/.cache/pre-commit ~/.cache/pip key: ${{ runner.os }}-pre-commit-${{ hashFiles('.pre-commit-config.yaml') }} - uses: actions/setup-python@v2 with: python-version: 3.9 - uses: psf/[email protected] - name: Install pre-commit run: | python -m pip install --upgrade pip python -m pip install --upgrade pre-commit - run: pre-commit run --verbose --all-files --show-diff-on-failure
1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
repos: - repo: https://github.com/pre-commit/pre-commit-hooks rev: v3.4.0 hooks: - id: check-executables-have-shebangs - id: check-yaml - id: end-of-file-fixer types: [python] - id: trailing-whitespace exclude: | (?x)^( data_structures/heap/binomial_heap.py )$ - id: requirements-txt-fixer - repo: https://github.com/psf/black rev: 21.4b0 hooks: - id: black - repo: https://github.com/PyCQA/isort rev: 5.8.0 hooks: - id: isort args: - --profile=black - repo: https://github.com/asottile/pyupgrade rev: v2.29.0 hooks: - id: pyupgrade args: - --py39-plus - repo: https://gitlab.com/pycqa/flake8 rev: 3.9.1 hooks: - id: flake8 args: - --ignore=E203,W503 - --max-complexity=25 - --max-line-length=88 # FIXME: fix mypy errors and then uncomment this # - repo: https://github.com/pre-commit/mirrors-mypy # rev: v0.782 # hooks: # - id: mypy # args: # - --ignore-missing-imports - repo: https://github.com/codespell-project/codespell rev: v2.0.0 hooks: - id: codespell args: - --ignore-words-list=ans,crate,fo,followings,hist,iff,mater,secant,som,tim - --skip="./.*,./strings/dictionary.txt,./strings/words.txt,./project_euler/problem_022/p022_names.txt" - --quiet-level=2 exclude: | (?x)^( strings/dictionary.txt | strings/words.txt | project_euler/problem_022/p022_names.txt )$ - repo: local hooks: - id: validate-filenames name: Validate filenames entry: ./scripts/validate_filenames.py language: script pass_filenames: false
repos: - repo: https://github.com/pre-commit/pre-commit-hooks rev: v3.4.0 hooks: - id: check-executables-have-shebangs - id: check-yaml - id: end-of-file-fixer types: [python] - id: trailing-whitespace exclude: | (?x)^( data_structures/heap/binomial_heap.py )$ - id: requirements-txt-fixer - repo: https://github.com/psf/black rev: 21.4b0 hooks: - id: black - repo: https://github.com/PyCQA/isort rev: 5.8.0 hooks: - id: isort args: - --profile=black - repo: https://github.com/asottile/pyupgrade rev: v2.29.0 hooks: - id: pyupgrade args: - --py39-plus - repo: https://gitlab.com/pycqa/flake8 rev: 3.9.1 hooks: - id: flake8 args: - --ignore=E203,W503 - --max-complexity=25 - --max-line-length=88 - repo: https://github.com/pre-commit/mirrors-mypy rev: v0.910 hooks: - id: mypy args: - --ignore-missing-imports - --install-types # See mirrors-mypy README.md - --non-interactive - repo: https://github.com/codespell-project/codespell rev: v2.0.0 hooks: - id: codespell args: - --ignore-words-list=ans,crate,fo,followings,hist,iff,mater,secant,som,tim - --skip="./.*,./strings/dictionary.txt,./strings/words.txt,./project_euler/problem_022/p022_names.txt" exclude: | (?x)^( strings/dictionary.txt | strings/words.txt | project_euler/problem_022/p022_names.txt )$ - repo: local hooks: - id: validate-filenames name: Validate filenames entry: ./scripts/validate_filenames.py language: script pass_filenames: false
1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import sys from collections import deque class LRUCache: """Page Replacement Algorithm, Least Recently Used (LRU) Caching.""" dq_store = object() # Cache store of keys key_reference_map = object() # References of the keys in cache _MAX_CAPACITY: int = 10 # Maximum capacity of cache def __init__(self, n: int): """Creates an empty store and map for the keys. The LRUCache is set the size n. """ self.dq_store = deque() self.key_reference_map = set() if not n: LRUCache._MAX_CAPACITY = sys.maxsize elif n < 0: raise ValueError("n should be an integer greater than 0.") else: LRUCache._MAX_CAPACITY = n def refer(self, x): """ Looks for a page in the cache store and adds reference to the set. Remove the least recently used key if the store is full. Update store to reflect recent access. """ if x not in self.key_reference_map: if len(self.dq_store) == LRUCache._MAX_CAPACITY: last_element = self.dq_store.pop() self.key_reference_map.remove(last_element) else: index_remove = 0 for idx, key in enumerate(self.dq_store): if key == x: index_remove = idx break self.dq_store.remove(index_remove) self.dq_store.appendleft(x) self.key_reference_map.add(x) def display(self): """ Prints all the elements in the store. """ for k in self.dq_store: print(k) if __name__ == "__main__": lru_cache = LRUCache(4) lru_cache.refer(1) lru_cache.refer(2) lru_cache.refer(3) lru_cache.refer(1) lru_cache.refer(4) lru_cache.refer(5) lru_cache.display()
from __future__ import annotations import sys from collections import deque from typing import Generic, TypeVar T = TypeVar("T") class LRUCache(Generic[T]): """ Page Replacement Algorithm, Least Recently Used (LRU) Caching. >>> lru_cache: LRUCache[str | int] = LRUCache(4) >>> lru_cache.refer("A") >>> lru_cache.refer(2) >>> lru_cache.refer(3) >>> lru_cache LRUCache(4) => [3, 2, 'A'] >>> lru_cache.refer("A") >>> lru_cache LRUCache(4) => ['A', 3, 2] >>> lru_cache.refer(4) >>> lru_cache.refer(5) >>> lru_cache LRUCache(4) => [5, 4, 'A', 3] """ dq_store: deque[T] # Cache store of keys key_reference: set[T] # References of the keys in cache _MAX_CAPACITY: int = 10 # Maximum capacity of cache def __init__(self, n: int) -> None: """Creates an empty store and map for the keys. The LRUCache is set the size n. """ self.dq_store = deque() self.key_reference = set() if not n: LRUCache._MAX_CAPACITY = sys.maxsize elif n < 0: raise ValueError("n should be an integer greater than 0.") else: LRUCache._MAX_CAPACITY = n def refer(self, x: T) -> None: """ Looks for a page in the cache store and adds reference to the set. Remove the least recently used key if the store is full. Update store to reflect recent access. """ if x not in self.key_reference: if len(self.dq_store) == LRUCache._MAX_CAPACITY: last_element = self.dq_store.pop() self.key_reference.remove(last_element) else: self.dq_store.remove(x) self.dq_store.appendleft(x) self.key_reference.add(x) def display(self) -> None: """ Prints all the elements in the store. """ for k in self.dq_store: print(k) def __repr__(self) -> str: return f"LRUCache({self._MAX_CAPACITY}) => {list(self.dq_store)}" if __name__ == "__main__": import doctest doctest.testmod() lru_cache: LRUCache[str | int] = LRUCache(4) lru_cache.refer("A") lru_cache.refer(2) lru_cache.refer(3) lru_cache.refer("A") lru_cache.refer(4) lru_cache.refer(5) lru_cache.display() print(lru_cache) assert str(lru_cache) == "LRUCache(4) => [5, 4, 'A', 3]"
1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
beautifulsoup4 fake_useragent keras<2.7.0 lxml matplotlib numpy opencv-python pandas pillow qiskit requests # scikit-fuzzy # Causing broken builds sklearn statsmodels sympy tensorflow texttable tweepy types-requests xgboost
beautifulsoup4 fake_useragent keras<2.7.0 lxml matplotlib numpy opencv-python pandas pillow qiskit requests # scikit-fuzzy # Causing broken builds sklearn statsmodels sympy tensorflow texttable tweepy xgboost
1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def bin_to_decimal(bin_string: str) -> int: """ Convert a binary value to its decimal equivalent >>> bin_to_decimal("101") 5 >>> bin_to_decimal(" 1010 ") 10 >>> bin_to_decimal("-11101") -29 >>> bin_to_decimal("0") 0 >>> bin_to_decimal("a") Traceback (most recent call last): ... ValueError: Non-binary value was passed to the function >>> bin_to_decimal("") Traceback (most recent call last): ... ValueError: Empty string was passed to the function >>> bin_to_decimal("39") Traceback (most recent call last): ... ValueError: Non-binary value was passed to the function """ bin_string = str(bin_string).strip() if not bin_string: raise ValueError("Empty string was passed to the function") is_negative = bin_string[0] == "-" if is_negative: bin_string = bin_string[1:] if not all(char in "01" for char in bin_string): raise ValueError("Non-binary value was passed to the function") decimal_number = 0 for char in bin_string: decimal_number = 2 * decimal_number + int(char) return -decimal_number if is_negative else decimal_number if __name__ == "__main__": from doctest import testmod testmod()
def bin_to_decimal(bin_string: str) -> int: """ Convert a binary value to its decimal equivalent >>> bin_to_decimal("101") 5 >>> bin_to_decimal(" 1010 ") 10 >>> bin_to_decimal("-11101") -29 >>> bin_to_decimal("0") 0 >>> bin_to_decimal("a") Traceback (most recent call last): ... ValueError: Non-binary value was passed to the function >>> bin_to_decimal("") Traceback (most recent call last): ... ValueError: Empty string was passed to the function >>> bin_to_decimal("39") Traceback (most recent call last): ... ValueError: Non-binary value was passed to the function """ bin_string = str(bin_string).strip() if not bin_string: raise ValueError("Empty string was passed to the function") is_negative = bin_string[0] == "-" if is_negative: bin_string = bin_string[1:] if not all(char in "01" for char in bin_string): raise ValueError("Non-binary value was passed to the function") decimal_number = 0 for char in bin_string: decimal_number = 2 * decimal_number + int(char) return -decimal_number if is_negative else decimal_number if __name__ == "__main__": from doctest import testmod testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" This is pure Python implementation of Tabu search algorithm for a Travelling Salesman Problem, that the distances between the cities are symmetric (the distance between city 'a' and city 'b' is the same between city 'b' and city 'a'). The TSP can be represented into a graph. The cities are represented by nodes and the distance between them is represented by the weight of the ark between the nodes. The .txt file with the graph has the form: node1 node2 distance_between_node1_and_node2 node1 node3 distance_between_node1_and_node3 ... Be careful node1, node2 and the distance between them, must exist only once. This means in the .txt file should not exist: node1 node2 distance_between_node1_and_node2 node2 node1 distance_between_node2_and_node1 For pytests run following command: pytest For manual testing run: python tabu_search.py -f your_file_name.txt -number_of_iterations_of_tabu_search \ -s size_of_tabu_search e.g. python tabu_search.py -f tabudata2.txt -i 4 -s 3 """ import argparse import copy def generate_neighbours(path): """ Pure implementation of generating a dictionary of neighbors and the cost with each neighbor, given a path file that includes a graph. :param path: The path to the .txt file that includes the graph (e.g.tabudata2.txt) :return dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. Example of dict_of_neighbours: >>) dict_of_neighbours[a] [[b,20],[c,18],[d,22],[e,26]] This indicates the neighbors of node (city) 'a', which has neighbor the node 'b' with distance 20, the node 'c' with distance 18, the node 'd' with distance 22 and the node 'e' with distance 26. """ dict_of_neighbours = {} with open(path) as f: for line in f: if line.split()[0] not in dict_of_neighbours: _list = list() _list.append([line.split()[1], line.split()[2]]) dict_of_neighbours[line.split()[0]] = _list else: dict_of_neighbours[line.split()[0]].append( [line.split()[1], line.split()[2]] ) if line.split()[1] not in dict_of_neighbours: _list = list() _list.append([line.split()[0], line.split()[2]]) dict_of_neighbours[line.split()[1]] = _list else: dict_of_neighbours[line.split()[1]].append( [line.split()[0], line.split()[2]] ) return dict_of_neighbours def generate_first_solution(path, dict_of_neighbours): """ Pure implementation of generating the first solution for the Tabu search to start, with the redundant resolution strategy. That means that we start from the starting node (e.g. node 'a'), then we go to the city nearest (lowest distance) to this node (let's assume is node 'c'), then we go to the nearest city of the node 'c', etc. till we have visited all cities and return to the starting node. :param path: The path to the .txt file that includes the graph (e.g.tabudata2.txt) :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :return first_solution: The solution for the first iteration of Tabu search using the redundant resolution strategy in a list. :return distance_of_first_solution: The total distance that Travelling Salesman will travel, if he follows the path in first_solution. """ with open(path) as f: start_node = f.read(1) end_node = start_node first_solution = [] visiting = start_node distance_of_first_solution = 0 while visiting not in first_solution: minim = 10000 for k in dict_of_neighbours[visiting]: if int(k[1]) < int(minim) and k[0] not in first_solution: minim = k[1] best_node = k[0] first_solution.append(visiting) distance_of_first_solution = distance_of_first_solution + int(minim) visiting = best_node first_solution.append(end_node) position = 0 for k in dict_of_neighbours[first_solution[-2]]: if k[0] == start_node: break position += 1 distance_of_first_solution = ( distance_of_first_solution + int(dict_of_neighbours[first_solution[-2]][position][1]) - 10000 ) return first_solution, distance_of_first_solution def find_neighborhood(solution, dict_of_neighbours): """ Pure implementation of generating the neighborhood (sorted by total distance of each solution from lowest to highest) of a solution with 1-1 exchange method, that means we exchange each node in a solution with each other node and generating a number of solution named neighborhood. :param solution: The solution in which we want to find the neighborhood. :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :return neighborhood_of_solution: A list that includes the solutions and the total distance of each solution (in form of list) that are produced with 1-1 exchange from the solution that the method took as an input Example: >>> find_neighborhood(['a', 'c', 'b', 'd', 'e', 'a'], ... {'a': [['b', '20'], ['c', '18'], ['d', '22'], ['e', '26']], ... 'c': [['a', '18'], ['b', '10'], ['d', '23'], ['e', '24']], ... 'b': [['a', '20'], ['c', '10'], ['d', '11'], ['e', '12']], ... 'e': [['a', '26'], ['b', '12'], ['c', '24'], ['d', '40']], ... 'd': [['a', '22'], ['b', '11'], ['c', '23'], ['e', '40']]} ... ) # doctest: +NORMALIZE_WHITESPACE [['a', 'e', 'b', 'd', 'c', 'a', 90], ['a', 'c', 'd', 'b', 'e', 'a', 90], ['a', 'd', 'b', 'c', 'e', 'a', 93], ['a', 'c', 'b', 'e', 'd', 'a', 102], ['a', 'c', 'e', 'd', 'b', 'a', 113], ['a', 'b', 'c', 'd', 'e', 'a', 119]] """ neighborhood_of_solution = [] for n in solution[1:-1]: idx1 = solution.index(n) for kn in solution[1:-1]: idx2 = solution.index(kn) if n == kn: continue _tmp = copy.deepcopy(solution) _tmp[idx1] = kn _tmp[idx2] = n distance = 0 for k in _tmp[:-1]: next_node = _tmp[_tmp.index(k) + 1] for i in dict_of_neighbours[k]: if i[0] == next_node: distance = distance + int(i[1]) _tmp.append(distance) if _tmp not in neighborhood_of_solution: neighborhood_of_solution.append(_tmp) indexOfLastItemInTheList = len(neighborhood_of_solution[0]) - 1 neighborhood_of_solution.sort(key=lambda x: x[indexOfLastItemInTheList]) return neighborhood_of_solution def tabu_search( first_solution, distance_of_first_solution, dict_of_neighbours, iters, size ): """ Pure implementation of Tabu search algorithm for a Travelling Salesman Problem in Python. :param first_solution: The solution for the first iteration of Tabu search using the redundant resolution strategy in a list. :param distance_of_first_solution: The total distance that Travelling Salesman will travel, if he follows the path in first_solution. :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :param iters: The number of iterations that Tabu search will execute. :param size: The size of Tabu List. :return best_solution_ever: The solution with the lowest distance that occurred during the execution of Tabu search. :return best_cost: The total distance that Travelling Salesman will travel, if he follows the path in best_solution ever. """ count = 1 solution = first_solution tabu_list = list() best_cost = distance_of_first_solution best_solution_ever = solution while count <= iters: neighborhood = find_neighborhood(solution, dict_of_neighbours) index_of_best_solution = 0 best_solution = neighborhood[index_of_best_solution] best_cost_index = len(best_solution) - 1 found = False while not found: i = 0 while i < len(best_solution): if best_solution[i] != solution[i]: first_exchange_node = best_solution[i] second_exchange_node = solution[i] break i = i + 1 if [first_exchange_node, second_exchange_node] not in tabu_list and [ second_exchange_node, first_exchange_node, ] not in tabu_list: tabu_list.append([first_exchange_node, second_exchange_node]) found = True solution = best_solution[:-1] cost = neighborhood[index_of_best_solution][best_cost_index] if cost < best_cost: best_cost = cost best_solution_ever = solution else: index_of_best_solution = index_of_best_solution + 1 best_solution = neighborhood[index_of_best_solution] if len(tabu_list) >= size: tabu_list.pop(0) count = count + 1 return best_solution_ever, best_cost def main(args=None): dict_of_neighbours = generate_neighbours(args.File) first_solution, distance_of_first_solution = generate_first_solution( args.File, dict_of_neighbours ) best_sol, best_cost = tabu_search( first_solution, distance_of_first_solution, dict_of_neighbours, args.Iterations, args.Size, ) print(f"Best solution: {best_sol}, with total distance: {best_cost}.") if __name__ == "__main__": parser = argparse.ArgumentParser(description="Tabu Search") parser.add_argument( "-f", "--File", type=str, help="Path to the file containing the data", required=True, ) parser.add_argument( "-i", "--Iterations", type=int, help="How many iterations the algorithm should perform", required=True, ) parser.add_argument( "-s", "--Size", type=int, help="Size of the tabu list", required=True ) # Pass the arguments to main method main(parser.parse_args())
""" This is pure Python implementation of Tabu search algorithm for a Travelling Salesman Problem, that the distances between the cities are symmetric (the distance between city 'a' and city 'b' is the same between city 'b' and city 'a'). The TSP can be represented into a graph. The cities are represented by nodes and the distance between them is represented by the weight of the ark between the nodes. The .txt file with the graph has the form: node1 node2 distance_between_node1_and_node2 node1 node3 distance_between_node1_and_node3 ... Be careful node1, node2 and the distance between them, must exist only once. This means in the .txt file should not exist: node1 node2 distance_between_node1_and_node2 node2 node1 distance_between_node2_and_node1 For pytests run following command: pytest For manual testing run: python tabu_search.py -f your_file_name.txt -number_of_iterations_of_tabu_search \ -s size_of_tabu_search e.g. python tabu_search.py -f tabudata2.txt -i 4 -s 3 """ import argparse import copy def generate_neighbours(path): """ Pure implementation of generating a dictionary of neighbors and the cost with each neighbor, given a path file that includes a graph. :param path: The path to the .txt file that includes the graph (e.g.tabudata2.txt) :return dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. Example of dict_of_neighbours: >>) dict_of_neighbours[a] [[b,20],[c,18],[d,22],[e,26]] This indicates the neighbors of node (city) 'a', which has neighbor the node 'b' with distance 20, the node 'c' with distance 18, the node 'd' with distance 22 and the node 'e' with distance 26. """ dict_of_neighbours = {} with open(path) as f: for line in f: if line.split()[0] not in dict_of_neighbours: _list = list() _list.append([line.split()[1], line.split()[2]]) dict_of_neighbours[line.split()[0]] = _list else: dict_of_neighbours[line.split()[0]].append( [line.split()[1], line.split()[2]] ) if line.split()[1] not in dict_of_neighbours: _list = list() _list.append([line.split()[0], line.split()[2]]) dict_of_neighbours[line.split()[1]] = _list else: dict_of_neighbours[line.split()[1]].append( [line.split()[0], line.split()[2]] ) return dict_of_neighbours def generate_first_solution(path, dict_of_neighbours): """ Pure implementation of generating the first solution for the Tabu search to start, with the redundant resolution strategy. That means that we start from the starting node (e.g. node 'a'), then we go to the city nearest (lowest distance) to this node (let's assume is node 'c'), then we go to the nearest city of the node 'c', etc. till we have visited all cities and return to the starting node. :param path: The path to the .txt file that includes the graph (e.g.tabudata2.txt) :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :return first_solution: The solution for the first iteration of Tabu search using the redundant resolution strategy in a list. :return distance_of_first_solution: The total distance that Travelling Salesman will travel, if he follows the path in first_solution. """ with open(path) as f: start_node = f.read(1) end_node = start_node first_solution = [] visiting = start_node distance_of_first_solution = 0 while visiting not in first_solution: minim = 10000 for k in dict_of_neighbours[visiting]: if int(k[1]) < int(minim) and k[0] not in first_solution: minim = k[1] best_node = k[0] first_solution.append(visiting) distance_of_first_solution = distance_of_first_solution + int(minim) visiting = best_node first_solution.append(end_node) position = 0 for k in dict_of_neighbours[first_solution[-2]]: if k[0] == start_node: break position += 1 distance_of_first_solution = ( distance_of_first_solution + int(dict_of_neighbours[first_solution[-2]][position][1]) - 10000 ) return first_solution, distance_of_first_solution def find_neighborhood(solution, dict_of_neighbours): """ Pure implementation of generating the neighborhood (sorted by total distance of each solution from lowest to highest) of a solution with 1-1 exchange method, that means we exchange each node in a solution with each other node and generating a number of solution named neighborhood. :param solution: The solution in which we want to find the neighborhood. :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :return neighborhood_of_solution: A list that includes the solutions and the total distance of each solution (in form of list) that are produced with 1-1 exchange from the solution that the method took as an input Example: >>> find_neighborhood(['a', 'c', 'b', 'd', 'e', 'a'], ... {'a': [['b', '20'], ['c', '18'], ['d', '22'], ['e', '26']], ... 'c': [['a', '18'], ['b', '10'], ['d', '23'], ['e', '24']], ... 'b': [['a', '20'], ['c', '10'], ['d', '11'], ['e', '12']], ... 'e': [['a', '26'], ['b', '12'], ['c', '24'], ['d', '40']], ... 'd': [['a', '22'], ['b', '11'], ['c', '23'], ['e', '40']]} ... ) # doctest: +NORMALIZE_WHITESPACE [['a', 'e', 'b', 'd', 'c', 'a', 90], ['a', 'c', 'd', 'b', 'e', 'a', 90], ['a', 'd', 'b', 'c', 'e', 'a', 93], ['a', 'c', 'b', 'e', 'd', 'a', 102], ['a', 'c', 'e', 'd', 'b', 'a', 113], ['a', 'b', 'c', 'd', 'e', 'a', 119]] """ neighborhood_of_solution = [] for n in solution[1:-1]: idx1 = solution.index(n) for kn in solution[1:-1]: idx2 = solution.index(kn) if n == kn: continue _tmp = copy.deepcopy(solution) _tmp[idx1] = kn _tmp[idx2] = n distance = 0 for k in _tmp[:-1]: next_node = _tmp[_tmp.index(k) + 1] for i in dict_of_neighbours[k]: if i[0] == next_node: distance = distance + int(i[1]) _tmp.append(distance) if _tmp not in neighborhood_of_solution: neighborhood_of_solution.append(_tmp) indexOfLastItemInTheList = len(neighborhood_of_solution[0]) - 1 neighborhood_of_solution.sort(key=lambda x: x[indexOfLastItemInTheList]) return neighborhood_of_solution def tabu_search( first_solution, distance_of_first_solution, dict_of_neighbours, iters, size ): """ Pure implementation of Tabu search algorithm for a Travelling Salesman Problem in Python. :param first_solution: The solution for the first iteration of Tabu search using the redundant resolution strategy in a list. :param distance_of_first_solution: The total distance that Travelling Salesman will travel, if he follows the path in first_solution. :param dict_of_neighbours: Dictionary with key each node and value a list of lists with the neighbors of the node and the cost (distance) for each neighbor. :param iters: The number of iterations that Tabu search will execute. :param size: The size of Tabu List. :return best_solution_ever: The solution with the lowest distance that occurred during the execution of Tabu search. :return best_cost: The total distance that Travelling Salesman will travel, if he follows the path in best_solution ever. """ count = 1 solution = first_solution tabu_list = list() best_cost = distance_of_first_solution best_solution_ever = solution while count <= iters: neighborhood = find_neighborhood(solution, dict_of_neighbours) index_of_best_solution = 0 best_solution = neighborhood[index_of_best_solution] best_cost_index = len(best_solution) - 1 found = False while not found: i = 0 while i < len(best_solution): if best_solution[i] != solution[i]: first_exchange_node = best_solution[i] second_exchange_node = solution[i] break i = i + 1 if [first_exchange_node, second_exchange_node] not in tabu_list and [ second_exchange_node, first_exchange_node, ] not in tabu_list: tabu_list.append([first_exchange_node, second_exchange_node]) found = True solution = best_solution[:-1] cost = neighborhood[index_of_best_solution][best_cost_index] if cost < best_cost: best_cost = cost best_solution_ever = solution else: index_of_best_solution = index_of_best_solution + 1 best_solution = neighborhood[index_of_best_solution] if len(tabu_list) >= size: tabu_list.pop(0) count = count + 1 return best_solution_ever, best_cost def main(args=None): dict_of_neighbours = generate_neighbours(args.File) first_solution, distance_of_first_solution = generate_first_solution( args.File, dict_of_neighbours ) best_sol, best_cost = tabu_search( first_solution, distance_of_first_solution, dict_of_neighbours, args.Iterations, args.Size, ) print(f"Best solution: {best_sol}, with total distance: {best_cost}.") if __name__ == "__main__": parser = argparse.ArgumentParser(description="Tabu Search") parser.add_argument( "-f", "--File", type=str, help="Path to the file containing the data", required=True, ) parser.add_argument( "-i", "--Iterations", type=int, help="How many iterations the algorithm should perform", required=True, ) parser.add_argument( "-s", "--Size", type=int, help="Size of the tabu list", required=True ) # Pass the arguments to main method main(parser.parse_args())
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Linked Lists consists of Nodes. Nodes contain data and also may link to other nodes: - Head Node: First node, the address of the head node gives us access of the complete list - Last node: points to null """ from typing import Any, Optional class Node: def __init__(self, item: Any, next: Any) -> None: self.item = item self.next = next class LinkedList: def __init__(self) -> None: self.head: Optional[Node] = None self.size = 0 def add(self, item: Any) -> None: self.head = Node(item, self.head) self.size += 1 def remove(self) -> Any: # Switched 'self.is_empty()' to 'self.head is None' # because mypy was considering the possibility that 'self.head' # can be None in below else part and giving error if self.head is None: return None else: item = self.head.item self.head = self.head.next self.size -= 1 return item def is_empty(self) -> bool: return self.head is None def __str__(self) -> str: """ >>> linked_list = LinkedList() >>> linked_list.add(23) >>> linked_list.add(14) >>> linked_list.add(9) >>> print(linked_list) 9 --> 14 --> 23 """ if not self.is_empty: return "" else: iterate = self.head item_str = "" item_list: list[str] = [] while iterate: item_list.append(str(iterate.item)) iterate = iterate.next item_str = " --> ".join(item_list) return item_str def __len__(self) -> int: """ >>> linked_list = LinkedList() >>> len(linked_list) 0 >>> linked_list.add("a") >>> len(linked_list) 1 >>> linked_list.add("b") >>> len(linked_list) 2 >>> _ = linked_list.remove() >>> len(linked_list) 1 >>> _ = linked_list.remove() >>> len(linked_list) 0 """ return self.size
""" Linked Lists consists of Nodes. Nodes contain data and also may link to other nodes: - Head Node: First node, the address of the head node gives us access of the complete list - Last node: points to null """ from typing import Any, Optional class Node: def __init__(self, item: Any, next: Any) -> None: self.item = item self.next = next class LinkedList: def __init__(self) -> None: self.head: Optional[Node] = None self.size = 0 def add(self, item: Any) -> None: self.head = Node(item, self.head) self.size += 1 def remove(self) -> Any: # Switched 'self.is_empty()' to 'self.head is None' # because mypy was considering the possibility that 'self.head' # can be None in below else part and giving error if self.head is None: return None else: item = self.head.item self.head = self.head.next self.size -= 1 return item def is_empty(self) -> bool: return self.head is None def __str__(self) -> str: """ >>> linked_list = LinkedList() >>> linked_list.add(23) >>> linked_list.add(14) >>> linked_list.add(9) >>> print(linked_list) 9 --> 14 --> 23 """ if not self.is_empty: return "" else: iterate = self.head item_str = "" item_list: list[str] = [] while iterate: item_list.append(str(iterate.item)) iterate = iterate.next item_str = " --> ".join(item_list) return item_str def __len__(self) -> int: """ >>> linked_list = LinkedList() >>> len(linked_list) 0 >>> linked_list.add("a") >>> len(linked_list) 1 >>> linked_list.add("b") >>> len(linked_list) 2 >>> _ = linked_list.remove() >>> len(linked_list) 1 >>> _ = linked_list.remove() >>> len(linked_list) 0 """ return self.size
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Prim's (also known as Jarník's) algorithm is a greedy algorithm that finds a minimum spanning tree for a weighted undirected graph. This means it finds a subset of the edges that forms a tree that includes every vertex, where the total weight of all the edges in the tree is minimized. The algorithm operates by building this tree one vertex at a time, from an arbitrary starting vertex, at each step adding the cheapest possible connection from the tree to another vertex. """ from __future__ import annotations from sys import maxsize from typing import Generic, TypeVar T = TypeVar("T") def get_parent_position(position: int) -> int: """ heap helper function get the position of the parent of the current node >>> get_parent_position(1) 0 >>> get_parent_position(2) 0 """ return (position - 1) // 2 def get_child_left_position(position: int) -> int: """ heap helper function get the position of the left child of the current node >>> get_child_left_position(0) 1 """ return (2 * position) + 1 def get_child_right_position(position: int) -> int: """ heap helper function get the position of the right child of the current node >>> get_child_right_position(0) 2 """ return (2 * position) + 2 class MinPriorityQueue(Generic[T]): """ Minimum Priority Queue Class Functions: is_empty: function to check if the priority queue is empty push: function to add an element with given priority to the queue extract_min: function to remove and return the element with lowest weight (highest priority) update_key: function to update the weight of the given key _bubble_up: helper function to place a node at the proper position (upward movement) _bubble_down: helper function to place a node at the proper position (downward movement) _swap_nodes: helper function to swap the nodes at the given positions >>> queue = MinPriorityQueue() >>> queue.push(1, 1000) >>> queue.push(2, 100) >>> queue.push(3, 4000) >>> queue.push(4, 3000) >>> print(queue.extract_min()) 2 >>> queue.update_key(4, 50) >>> print(queue.extract_min()) 4 >>> print(queue.extract_min()) 1 >>> print(queue.extract_min()) 3 """ def __init__(self) -> None: self.heap: list[tuple[T, int]] = [] self.position_map: dict[T, int] = {} self.elements: int = 0 def __len__(self) -> int: return self.elements def __repr__(self) -> str: return str(self.heap) def is_empty(self) -> bool: # Check if the priority queue is empty return self.elements == 0 def push(self, elem: T, weight: int) -> None: # Add an element with given priority to the queue self.heap.append((elem, weight)) self.position_map[elem] = self.elements self.elements += 1 self._bubble_up(elem) def extract_min(self) -> T: # Remove and return the element with lowest weight (highest priority) if self.elements > 1: self._swap_nodes(0, self.elements - 1) elem, _ = self.heap.pop() del self.position_map[elem] self.elements -= 1 if self.elements > 0: bubble_down_elem, _ = self.heap[0] self._bubble_down(bubble_down_elem) return elem def update_key(self, elem: T, weight: int) -> None: # Update the weight of the given key position = self.position_map[elem] self.heap[position] = (elem, weight) if position > 0: parent_position = get_parent_position(position) _, parent_weight = self.heap[parent_position] if parent_weight > weight: self._bubble_up(elem) else: self._bubble_down(elem) else: self._bubble_down(elem) def _bubble_up(self, elem: T) -> None: # Place a node at the proper position (upward movement) [to be used internally # only] curr_pos = self.position_map[elem] if curr_pos == 0: return parent_position = get_parent_position(curr_pos) _, weight = self.heap[curr_pos] _, parent_weight = self.heap[parent_position] if parent_weight > weight: self._swap_nodes(parent_position, curr_pos) return self._bubble_up(elem) return def _bubble_down(self, elem: T) -> None: # Place a node at the proper position (downward movement) [to be used # internally only] curr_pos = self.position_map[elem] _, weight = self.heap[curr_pos] child_left_position = get_child_left_position(curr_pos) child_right_position = get_child_right_position(curr_pos) if child_left_position < self.elements and child_right_position < self.elements: _, child_left_weight = self.heap[child_left_position] _, child_right_weight = self.heap[child_right_position] if child_right_weight < child_left_weight: if child_right_weight < weight: self._swap_nodes(child_right_position, curr_pos) return self._bubble_down(elem) if child_left_position < self.elements: _, child_left_weight = self.heap[child_left_position] if child_left_weight < weight: self._swap_nodes(child_left_position, curr_pos) return self._bubble_down(elem) else: return if child_right_position < self.elements: _, child_right_weight = self.heap[child_right_position] if child_right_weight < weight: self._swap_nodes(child_right_position, curr_pos) return self._bubble_down(elem) else: return def _swap_nodes(self, node1_pos: int, node2_pos: int) -> None: # Swap the nodes at the given positions node1_elem = self.heap[node1_pos][0] node2_elem = self.heap[node2_pos][0] self.heap[node1_pos], self.heap[node2_pos] = ( self.heap[node2_pos], self.heap[node1_pos], ) self.position_map[node1_elem] = node2_pos self.position_map[node2_elem] = node1_pos class GraphUndirectedWeighted(Generic[T]): """ Graph Undirected Weighted Class Functions: add_node: function to add a node in the graph add_edge: function to add an edge between 2 nodes in the graph """ def __init__(self) -> None: self.connections: dict[T, dict[T, int]] = {} self.nodes: int = 0 def __repr__(self) -> str: return str(self.connections) def __len__(self) -> int: return self.nodes def add_node(self, node: T) -> None: # Add a node in the graph if it is not in the graph if node not in self.connections: self.connections[node] = {} self.nodes += 1 def add_edge(self, node1: T, node2: T, weight: int) -> None: # Add an edge between 2 nodes in the graph self.add_node(node1) self.add_node(node2) self.connections[node1][node2] = weight self.connections[node2][node1] = weight def prims_algo( graph: GraphUndirectedWeighted[T], ) -> tuple[dict[T, int], dict[T, T | None]]: """ >>> graph = GraphUndirectedWeighted() >>> graph.add_edge("a", "b", 3) >>> graph.add_edge("b", "c", 10) >>> graph.add_edge("c", "d", 5) >>> graph.add_edge("a", "c", 15) >>> graph.add_edge("b", "d", 100) >>> dist, parent = prims_algo(graph) >>> abs(dist["a"] - dist["b"]) 3 >>> abs(dist["d"] - dist["b"]) 15 >>> abs(dist["a"] - dist["c"]) 13 """ # prim's algorithm for minimum spanning tree dist: dict[T, int] = {node: maxsize for node in graph.connections} parent: dict[T, T | None] = {node: None for node in graph.connections} priority_queue: MinPriorityQueue[T] = MinPriorityQueue() for node, weight in dist.items(): priority_queue.push(node, weight) if priority_queue.is_empty(): return dist, parent # initialization node = priority_queue.extract_min() dist[node] = 0 for neighbour in graph.connections[node]: if dist[neighbour] > dist[node] + graph.connections[node][neighbour]: dist[neighbour] = dist[node] + graph.connections[node][neighbour] priority_queue.update_key(neighbour, dist[neighbour]) parent[neighbour] = node # running prim's algorithm while not priority_queue.is_empty(): node = priority_queue.extract_min() for neighbour in graph.connections[node]: if dist[neighbour] > dist[node] + graph.connections[node][neighbour]: dist[neighbour] = dist[node] + graph.connections[node][neighbour] priority_queue.update_key(neighbour, dist[neighbour]) parent[neighbour] = node return dist, parent
""" Prim's (also known as Jarník's) algorithm is a greedy algorithm that finds a minimum spanning tree for a weighted undirected graph. This means it finds a subset of the edges that forms a tree that includes every vertex, where the total weight of all the edges in the tree is minimized. The algorithm operates by building this tree one vertex at a time, from an arbitrary starting vertex, at each step adding the cheapest possible connection from the tree to another vertex. """ from __future__ import annotations from sys import maxsize from typing import Generic, TypeVar T = TypeVar("T") def get_parent_position(position: int) -> int: """ heap helper function get the position of the parent of the current node >>> get_parent_position(1) 0 >>> get_parent_position(2) 0 """ return (position - 1) // 2 def get_child_left_position(position: int) -> int: """ heap helper function get the position of the left child of the current node >>> get_child_left_position(0) 1 """ return (2 * position) + 1 def get_child_right_position(position: int) -> int: """ heap helper function get the position of the right child of the current node >>> get_child_right_position(0) 2 """ return (2 * position) + 2 class MinPriorityQueue(Generic[T]): """ Minimum Priority Queue Class Functions: is_empty: function to check if the priority queue is empty push: function to add an element with given priority to the queue extract_min: function to remove and return the element with lowest weight (highest priority) update_key: function to update the weight of the given key _bubble_up: helper function to place a node at the proper position (upward movement) _bubble_down: helper function to place a node at the proper position (downward movement) _swap_nodes: helper function to swap the nodes at the given positions >>> queue = MinPriorityQueue() >>> queue.push(1, 1000) >>> queue.push(2, 100) >>> queue.push(3, 4000) >>> queue.push(4, 3000) >>> print(queue.extract_min()) 2 >>> queue.update_key(4, 50) >>> print(queue.extract_min()) 4 >>> print(queue.extract_min()) 1 >>> print(queue.extract_min()) 3 """ def __init__(self) -> None: self.heap: list[tuple[T, int]] = [] self.position_map: dict[T, int] = {} self.elements: int = 0 def __len__(self) -> int: return self.elements def __repr__(self) -> str: return str(self.heap) def is_empty(self) -> bool: # Check if the priority queue is empty return self.elements == 0 def push(self, elem: T, weight: int) -> None: # Add an element with given priority to the queue self.heap.append((elem, weight)) self.position_map[elem] = self.elements self.elements += 1 self._bubble_up(elem) def extract_min(self) -> T: # Remove and return the element with lowest weight (highest priority) if self.elements > 1: self._swap_nodes(0, self.elements - 1) elem, _ = self.heap.pop() del self.position_map[elem] self.elements -= 1 if self.elements > 0: bubble_down_elem, _ = self.heap[0] self._bubble_down(bubble_down_elem) return elem def update_key(self, elem: T, weight: int) -> None: # Update the weight of the given key position = self.position_map[elem] self.heap[position] = (elem, weight) if position > 0: parent_position = get_parent_position(position) _, parent_weight = self.heap[parent_position] if parent_weight > weight: self._bubble_up(elem) else: self._bubble_down(elem) else: self._bubble_down(elem) def _bubble_up(self, elem: T) -> None: # Place a node at the proper position (upward movement) [to be used internally # only] curr_pos = self.position_map[elem] if curr_pos == 0: return parent_position = get_parent_position(curr_pos) _, weight = self.heap[curr_pos] _, parent_weight = self.heap[parent_position] if parent_weight > weight: self._swap_nodes(parent_position, curr_pos) return self._bubble_up(elem) return def _bubble_down(self, elem: T) -> None: # Place a node at the proper position (downward movement) [to be used # internally only] curr_pos = self.position_map[elem] _, weight = self.heap[curr_pos] child_left_position = get_child_left_position(curr_pos) child_right_position = get_child_right_position(curr_pos) if child_left_position < self.elements and child_right_position < self.elements: _, child_left_weight = self.heap[child_left_position] _, child_right_weight = self.heap[child_right_position] if child_right_weight < child_left_weight: if child_right_weight < weight: self._swap_nodes(child_right_position, curr_pos) return self._bubble_down(elem) if child_left_position < self.elements: _, child_left_weight = self.heap[child_left_position] if child_left_weight < weight: self._swap_nodes(child_left_position, curr_pos) return self._bubble_down(elem) else: return if child_right_position < self.elements: _, child_right_weight = self.heap[child_right_position] if child_right_weight < weight: self._swap_nodes(child_right_position, curr_pos) return self._bubble_down(elem) else: return def _swap_nodes(self, node1_pos: int, node2_pos: int) -> None: # Swap the nodes at the given positions node1_elem = self.heap[node1_pos][0] node2_elem = self.heap[node2_pos][0] self.heap[node1_pos], self.heap[node2_pos] = ( self.heap[node2_pos], self.heap[node1_pos], ) self.position_map[node1_elem] = node2_pos self.position_map[node2_elem] = node1_pos class GraphUndirectedWeighted(Generic[T]): """ Graph Undirected Weighted Class Functions: add_node: function to add a node in the graph add_edge: function to add an edge between 2 nodes in the graph """ def __init__(self) -> None: self.connections: dict[T, dict[T, int]] = {} self.nodes: int = 0 def __repr__(self) -> str: return str(self.connections) def __len__(self) -> int: return self.nodes def add_node(self, node: T) -> None: # Add a node in the graph if it is not in the graph if node not in self.connections: self.connections[node] = {} self.nodes += 1 def add_edge(self, node1: T, node2: T, weight: int) -> None: # Add an edge between 2 nodes in the graph self.add_node(node1) self.add_node(node2) self.connections[node1][node2] = weight self.connections[node2][node1] = weight def prims_algo( graph: GraphUndirectedWeighted[T], ) -> tuple[dict[T, int], dict[T, T | None]]: """ >>> graph = GraphUndirectedWeighted() >>> graph.add_edge("a", "b", 3) >>> graph.add_edge("b", "c", 10) >>> graph.add_edge("c", "d", 5) >>> graph.add_edge("a", "c", 15) >>> graph.add_edge("b", "d", 100) >>> dist, parent = prims_algo(graph) >>> abs(dist["a"] - dist["b"]) 3 >>> abs(dist["d"] - dist["b"]) 15 >>> abs(dist["a"] - dist["c"]) 13 """ # prim's algorithm for minimum spanning tree dist: dict[T, int] = {node: maxsize for node in graph.connections} parent: dict[T, T | None] = {node: None for node in graph.connections} priority_queue: MinPriorityQueue[T] = MinPriorityQueue() for node, weight in dist.items(): priority_queue.push(node, weight) if priority_queue.is_empty(): return dist, parent # initialization node = priority_queue.extract_min() dist[node] = 0 for neighbour in graph.connections[node]: if dist[neighbour] > dist[node] + graph.connections[node][neighbour]: dist[neighbour] = dist[node] + graph.connections[node][neighbour] priority_queue.update_key(neighbour, dist[neighbour]) parent[neighbour] = node # running prim's algorithm while not priority_queue.is_empty(): node = priority_queue.extract_min() for neighbour in graph.connections[node]: if dist[neighbour] > dist[node] + graph.connections[node][neighbour]: dist[neighbour] = dist[node] + graph.connections[node][neighbour] priority_queue.update_key(neighbour, dist[neighbour]) parent[neighbour] = node return dist, parent
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Author : Syed Faizan ( 3rd Year IIIT Pune ) Github : faizan2700 Purpose : You have one function f(x) which takes float integer and returns float you have to integrate the function in limits a to b. The approximation proposed by Thomas Simpsons in 1743 is one way to calculate integration. ( read article : https://cp-algorithms.com/num_methods/simpson-integration.html ) simpson_integration() takes function,lower_limit=a,upper_limit=b,precision and returns the integration of function in given limit. """ # constants # the more the number of steps the more accurate N_STEPS = 1000 def f(x: float) -> float: return x * x """ Summary of Simpson Approximation : By simpsons integration : 1. integration of fxdx with limit a to b is = f(x0) + 4 * f(x1) + 2 * f(x2) + 4 * f(x3) + 2 * f(x4)..... + f(xn) where x0 = a xi = a + i * h xn = b """ def simpson_integration(function, a: float, b: float, precision: int = 4) -> float: """ Args: function : the function which's integration is desired a : the lower limit of integration b : upper limit of integraion precision : precision of the result,error required default is 4 Returns: result : the value of the approximated integration of function in range a to b Raises: AssertionError: function is not callable AssertionError: a is not float or integer AssertionError: function should return float or integer AssertionError: b is not float or integer AssertionError: precision is not positive integer >>> simpson_integration(lambda x : x*x,1,2,3) 2.333 >>> simpson_integration(lambda x : x*x,'wrong_input',2,3) Traceback (most recent call last): ... AssertionError: a should be float or integer your input : wrong_input >>> simpson_integration(lambda x : x*x,1,'wrong_input',3) Traceback (most recent call last): ... AssertionError: b should be float or integer your input : wrong_input >>> simpson_integration(lambda x : x*x,1,2,'wrong_input') Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : wrong_input >>> simpson_integration('wrong_input',2,3,4) Traceback (most recent call last): ... AssertionError: the function(object) passed should be callable your input : ... >>> simpson_integration(lambda x : x*x,3.45,3.2,1) -2.8 >>> simpson_integration(lambda x : x*x,3.45,3.2,0) Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : 0 >>> simpson_integration(lambda x : x*x,3.45,3.2,-1) Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : -1 """ assert callable( function ), f"the function(object) passed should be callable your input : {function}" assert isinstance(a, float) or isinstance( a, int ), f"a should be float or integer your input : {a}" assert isinstance(function(a), float) or isinstance(function(a), int), ( "the function should return integer or float return type of your function, " f"{type(a)}" ) assert isinstance(b, float) or isinstance( b, int ), f"b should be float or integer your input : {b}" assert ( isinstance(precision, int) and precision > 0 ), f"precision should be positive integer your input : {precision}" # just applying the formula of simpson for approximate integraion written in # mentioned article in first comment of this file and above this function h = (b - a) / N_STEPS result = function(a) + function(b) for i in range(1, N_STEPS): a1 = a + h * i result += function(a1) * (4 if i % 2 else 2) result *= h / 3 return round(result, precision) if __name__ == "__main__": import doctest doctest.testmod()
""" Author : Syed Faizan ( 3rd Year IIIT Pune ) Github : faizan2700 Purpose : You have one function f(x) which takes float integer and returns float you have to integrate the function in limits a to b. The approximation proposed by Thomas Simpsons in 1743 is one way to calculate integration. ( read article : https://cp-algorithms.com/num_methods/simpson-integration.html ) simpson_integration() takes function,lower_limit=a,upper_limit=b,precision and returns the integration of function in given limit. """ # constants # the more the number of steps the more accurate N_STEPS = 1000 def f(x: float) -> float: return x * x """ Summary of Simpson Approximation : By simpsons integration : 1. integration of fxdx with limit a to b is = f(x0) + 4 * f(x1) + 2 * f(x2) + 4 * f(x3) + 2 * f(x4)..... + f(xn) where x0 = a xi = a + i * h xn = b """ def simpson_integration(function, a: float, b: float, precision: int = 4) -> float: """ Args: function : the function which's integration is desired a : the lower limit of integration b : upper limit of integraion precision : precision of the result,error required default is 4 Returns: result : the value of the approximated integration of function in range a to b Raises: AssertionError: function is not callable AssertionError: a is not float or integer AssertionError: function should return float or integer AssertionError: b is not float or integer AssertionError: precision is not positive integer >>> simpson_integration(lambda x : x*x,1,2,3) 2.333 >>> simpson_integration(lambda x : x*x,'wrong_input',2,3) Traceback (most recent call last): ... AssertionError: a should be float or integer your input : wrong_input >>> simpson_integration(lambda x : x*x,1,'wrong_input',3) Traceback (most recent call last): ... AssertionError: b should be float or integer your input : wrong_input >>> simpson_integration(lambda x : x*x,1,2,'wrong_input') Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : wrong_input >>> simpson_integration('wrong_input',2,3,4) Traceback (most recent call last): ... AssertionError: the function(object) passed should be callable your input : ... >>> simpson_integration(lambda x : x*x,3.45,3.2,1) -2.8 >>> simpson_integration(lambda x : x*x,3.45,3.2,0) Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : 0 >>> simpson_integration(lambda x : x*x,3.45,3.2,-1) Traceback (most recent call last): ... AssertionError: precision should be positive integer your input : -1 """ assert callable( function ), f"the function(object) passed should be callable your input : {function}" assert isinstance(a, float) or isinstance( a, int ), f"a should be float or integer your input : {a}" assert isinstance(function(a), float) or isinstance(function(a), int), ( "the function should return integer or float return type of your function, " f"{type(a)}" ) assert isinstance(b, float) or isinstance( b, int ), f"b should be float or integer your input : {b}" assert ( isinstance(precision, int) and precision > 0 ), f"precision should be positive integer your input : {precision}" # just applying the formula of simpson for approximate integraion written in # mentioned article in first comment of this file and above this function h = (b - a) / N_STEPS result = function(a) + function(b) for i in range(1, N_STEPS): a1 = a + h * i result += function(a1) * (4 if i % 2 else 2) result *= h / 3 return round(result, precision) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#
#
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" https://en.wikipedia.org/wiki/Component_(graph_theory) Finding connected components in graph """ test_graph_1 = {0: [1, 2], 1: [0, 3], 2: [0], 3: [1], 4: [5, 6], 5: [4, 6], 6: [4, 5]} test_graph_2 = {0: [1, 2, 3], 1: [0, 3], 2: [0], 3: [0, 1], 4: [], 5: []} def dfs(graph: dict, vert: int, visited: list) -> list: """ Use depth first search to find all vertices being in the same component as initial vertex >>> dfs(test_graph_1, 0, 5 * [False]) [0, 1, 3, 2] >>> dfs(test_graph_2, 0, 6 * [False]) [0, 1, 3, 2] """ visited[vert] = True connected_verts = [] for neighbour in graph[vert]: if not visited[neighbour]: connected_verts += dfs(graph, neighbour, visited) return [vert] + connected_verts def connected_components(graph: dict) -> list: """ This function takes graph as a parameter and then returns the list of connected components >>> connected_components(test_graph_1) [[0, 1, 3, 2], [4, 5, 6]] >>> connected_components(test_graph_2) [[0, 1, 3, 2], [4], [5]] """ graph_size = len(graph) visited = graph_size * [False] components_list = [] for i in range(graph_size): if not visited[i]: i_connected = dfs(graph, i, visited) components_list.append(i_connected) return components_list if __name__ == "__main__": import doctest doctest.testmod()
""" https://en.wikipedia.org/wiki/Component_(graph_theory) Finding connected components in graph """ test_graph_1 = {0: [1, 2], 1: [0, 3], 2: [0], 3: [1], 4: [5, 6], 5: [4, 6], 6: [4, 5]} test_graph_2 = {0: [1, 2, 3], 1: [0, 3], 2: [0], 3: [0, 1], 4: [], 5: []} def dfs(graph: dict, vert: int, visited: list) -> list: """ Use depth first search to find all vertices being in the same component as initial vertex >>> dfs(test_graph_1, 0, 5 * [False]) [0, 1, 3, 2] >>> dfs(test_graph_2, 0, 6 * [False]) [0, 1, 3, 2] """ visited[vert] = True connected_verts = [] for neighbour in graph[vert]: if not visited[neighbour]: connected_verts += dfs(graph, neighbour, visited) return [vert] + connected_verts def connected_components(graph: dict) -> list: """ This function takes graph as a parameter and then returns the list of connected components >>> connected_components(test_graph_1) [[0, 1, 3, 2], [4, 5, 6]] >>> connected_components(test_graph_2) [[0, 1, 3, 2], [4], [5]] """ graph_size = len(graph) visited = graph_size * [False] components_list = [] for i in range(graph_size): if not visited[i]: i_connected = dfs(graph, i, visited) components_list.append(i_connected) return components_list if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" author: Christian Bender date: 21.12.2017 class: XORCipher This class implements the XOR-cipher algorithm and provides some useful methods for encrypting and decrypting strings and files. Overview about methods - encrypt : list of char - decrypt : list of char - encrypt_string : str - decrypt_string : str - encrypt_file : boolean - decrypt_file : boolean """ from __future__ import annotations class XORCipher: def __init__(self, key: int = 0): """ simple constructor that receives a key or uses default key = 0 """ # private field self.__key = key def encrypt(self, content: str, key: int) -> list[str]: """ input: 'content' of type string and 'key' of type int output: encrypted string 'content' as a list of chars if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key is an appropriate size key %= 255 return [chr(ord(ch) ^ key) for ch in content] def decrypt(self, content: str, key: int) -> list[str]: """ input: 'content' of type list and 'key' of type int output: decrypted string 'content' as a list of chars if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, list) key = key or self.__key or 1 # make sure key is an appropriate size key %= 255 return [chr(ord(ch) ^ key) for ch in content] def encrypt_string(self, content: str, key: int = 0) -> str: """ input: 'content' of type string and 'key' of type int output: encrypted string 'content' if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key can be any size while key > 255: key -= 255 # This will be returned ans = "" for ch in content: ans += chr(ord(ch) ^ key) return ans def decrypt_string(self, content: str, key: int = 0) -> str: """ input: 'content' of type string and 'key' of type int output: decrypted string 'content' if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key can be any size while key > 255: key -= 255 # This will be returned ans = "" for ch in content: ans += chr(ord(ch) ^ key) return ans def encrypt_file(self, file: str, key: int = 0) -> bool: """ input: filename (str) and a key (int) output: returns true if encrypt process was successful otherwise false if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(file, str) and isinstance(key, int) try: with open(file) as fin: with open("encrypt.out", "w+") as fout: # actual encrypt-process for line in fin: fout.write(self.encrypt_string(line, key)) except OSError: return False return True def decrypt_file(self, file: str, key: int) -> bool: """ input: filename (str) and a key (int) output: returns true if decrypt process was successful otherwise false if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(file, str) and isinstance(key, int) try: with open(file) as fin: with open("decrypt.out", "w+") as fout: # actual encrypt-process for line in fin: fout.write(self.decrypt_string(line, key)) except OSError: return False return True # Tests # crypt = XORCipher() # key = 67 # # test encrypt # print(crypt.encrypt("hallo welt",key)) # # test decrypt # print(crypt.decrypt(crypt.encrypt("hallo welt",key), key)) # # test encrypt_string # print(crypt.encrypt_string("hallo welt",key)) # # test decrypt_string # print(crypt.decrypt_string(crypt.encrypt_string("hallo welt",key),key)) # if (crypt.encrypt_file("test.txt",key)): # print("encrypt successful") # else: # print("encrypt unsuccessful") # if (crypt.decrypt_file("encrypt.out",key)): # print("decrypt successful") # else: # print("decrypt unsuccessful")
""" author: Christian Bender date: 21.12.2017 class: XORCipher This class implements the XOR-cipher algorithm and provides some useful methods for encrypting and decrypting strings and files. Overview about methods - encrypt : list of char - decrypt : list of char - encrypt_string : str - decrypt_string : str - encrypt_file : boolean - decrypt_file : boolean """ from __future__ import annotations class XORCipher: def __init__(self, key: int = 0): """ simple constructor that receives a key or uses default key = 0 """ # private field self.__key = key def encrypt(self, content: str, key: int) -> list[str]: """ input: 'content' of type string and 'key' of type int output: encrypted string 'content' as a list of chars if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key is an appropriate size key %= 255 return [chr(ord(ch) ^ key) for ch in content] def decrypt(self, content: str, key: int) -> list[str]: """ input: 'content' of type list and 'key' of type int output: decrypted string 'content' as a list of chars if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, list) key = key or self.__key or 1 # make sure key is an appropriate size key %= 255 return [chr(ord(ch) ^ key) for ch in content] def encrypt_string(self, content: str, key: int = 0) -> str: """ input: 'content' of type string and 'key' of type int output: encrypted string 'content' if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key can be any size while key > 255: key -= 255 # This will be returned ans = "" for ch in content: ans += chr(ord(ch) ^ key) return ans def decrypt_string(self, content: str, key: int = 0) -> str: """ input: 'content' of type string and 'key' of type int output: decrypted string 'content' if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(key, int) and isinstance(content, str) key = key or self.__key or 1 # make sure key can be any size while key > 255: key -= 255 # This will be returned ans = "" for ch in content: ans += chr(ord(ch) ^ key) return ans def encrypt_file(self, file: str, key: int = 0) -> bool: """ input: filename (str) and a key (int) output: returns true if encrypt process was successful otherwise false if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(file, str) and isinstance(key, int) try: with open(file) as fin: with open("encrypt.out", "w+") as fout: # actual encrypt-process for line in fin: fout.write(self.encrypt_string(line, key)) except OSError: return False return True def decrypt_file(self, file: str, key: int) -> bool: """ input: filename (str) and a key (int) output: returns true if decrypt process was successful otherwise false if key not passed the method uses the key by the constructor. otherwise key = 1 """ # precondition assert isinstance(file, str) and isinstance(key, int) try: with open(file) as fin: with open("decrypt.out", "w+") as fout: # actual encrypt-process for line in fin: fout.write(self.decrypt_string(line, key)) except OSError: return False return True # Tests # crypt = XORCipher() # key = 67 # # test encrypt # print(crypt.encrypt("hallo welt",key)) # # test decrypt # print(crypt.decrypt(crypt.encrypt("hallo welt",key), key)) # # test encrypt_string # print(crypt.encrypt_string("hallo welt",key)) # # test decrypt_string # print(crypt.decrypt_string(crypt.encrypt_string("hallo welt",key),key)) # if (crypt.encrypt_file("test.txt",key)): # print("encrypt successful") # else: # print("encrypt unsuccessful") # if (crypt.decrypt_file("encrypt.out",key)): # print("decrypt successful") # else: # print("decrypt unsuccessful")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/usr/bin/env python3 import os try: from .build_directory_md import good_file_paths except ImportError: from build_directory_md import good_file_paths # type: ignore filepaths = list(good_file_paths()) assert filepaths, "good_file_paths() failed!" upper_files = [file for file in filepaths if file != file.lower()] if upper_files: print(f"{len(upper_files)} files contain uppercase characters:") print("\n".join(upper_files) + "\n") space_files = [file for file in filepaths if " " in file] if space_files: print(f"{len(space_files)} files contain space characters:") print("\n".join(space_files) + "\n") hyphen_files = [file for file in filepaths if "-" in file] if hyphen_files: print(f"{len(hyphen_files)} files contain hyphen characters:") print("\n".join(hyphen_files) + "\n") nodir_files = [file for file in filepaths if os.sep not in file] if nodir_files: print(f"{len(nodir_files)} files are not in a directory:") print("\n".join(nodir_files) + "\n") bad_files = len(upper_files + space_files + hyphen_files + nodir_files) if bad_files: import sys sys.exit(bad_files)
#!/usr/bin/env python3 import os try: from .build_directory_md import good_file_paths except ImportError: from build_directory_md import good_file_paths # type: ignore filepaths = list(good_file_paths()) assert filepaths, "good_file_paths() failed!" upper_files = [file for file in filepaths if file != file.lower()] if upper_files: print(f"{len(upper_files)} files contain uppercase characters:") print("\n".join(upper_files) + "\n") space_files = [file for file in filepaths if " " in file] if space_files: print(f"{len(space_files)} files contain space characters:") print("\n".join(space_files) + "\n") hyphen_files = [file for file in filepaths if "-" in file] if hyphen_files: print(f"{len(hyphen_files)} files contain hyphen characters:") print("\n".join(hyphen_files) + "\n") nodir_files = [file for file in filepaths if os.sep not in file] if nodir_files: print(f"{len(nodir_files)} files are not in a directory:") print("\n".join(nodir_files) + "\n") bad_files = len(upper_files + space_files + hyphen_files + nodir_files) if bad_files: import sys sys.exit(bad_files)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Checks if a system of forces is in static equilibrium. """ from __future__ import annotations from numpy import array, cos, cross, ndarray, radians, sin def polar_force( magnitude: float, angle: float, radian_mode: bool = False ) -> list[float]: """ Resolves force along rectangular components. (force, angle) => (force_x, force_y) >>> polar_force(10, 45) [7.0710678118654755, 7.071067811865475] >>> polar_force(10, 3.14, radian_mode=True) [-9.999987317275394, 0.01592652916486828] """ if radian_mode: return [magnitude * cos(angle), magnitude * sin(angle)] return [magnitude * cos(radians(angle)), magnitude * sin(radians(angle))] def in_static_equilibrium( forces: ndarray, location: ndarray, eps: float = 10 ** -1 ) -> bool: """ Check if a system is in equilibrium. It takes two numpy.array objects. forces ==> [ [force1_x, force1_y], [force2_x, force2_y], ....] location ==> [ [x1, y1], [x2, y2], ....] >>> force = array([[1, 1], [-1, 2]]) >>> location = array([[1, 0], [10, 0]]) >>> in_static_equilibrium(force, location) False """ # summation of moments is zero moments: ndarray = cross(location, forces) sum_moments: float = sum(moments) return abs(sum_moments) < eps if __name__ == "__main__": # Test to check if it works forces = array( [polar_force(718.4, 180 - 30), polar_force(879.54, 45), polar_force(100, -90)] ) location = array([[0, 0], [0, 0], [0, 0]]) assert in_static_equilibrium(forces, location) # Problem 1 in image_data/2D_problems.jpg forces = array( [ polar_force(30 * 9.81, 15), polar_force(215, 180 - 45), polar_force(264, 90 - 30), ] ) location = array([[0, 0], [0, 0], [0, 0]]) assert in_static_equilibrium(forces, location) # Problem in image_data/2D_problems_1.jpg forces = array([[0, -2000], [0, -1200], [0, 15600], [0, -12400]]) location = array([[0, 0], [6, 0], [10, 0], [12, 0]]) assert in_static_equilibrium(forces, location) import doctest doctest.testmod()
""" Checks if a system of forces is in static equilibrium. """ from __future__ import annotations from numpy import array, cos, cross, ndarray, radians, sin def polar_force( magnitude: float, angle: float, radian_mode: bool = False ) -> list[float]: """ Resolves force along rectangular components. (force, angle) => (force_x, force_y) >>> polar_force(10, 45) [7.0710678118654755, 7.071067811865475] >>> polar_force(10, 3.14, radian_mode=True) [-9.999987317275394, 0.01592652916486828] """ if radian_mode: return [magnitude * cos(angle), magnitude * sin(angle)] return [magnitude * cos(radians(angle)), magnitude * sin(radians(angle))] def in_static_equilibrium( forces: ndarray, location: ndarray, eps: float = 10 ** -1 ) -> bool: """ Check if a system is in equilibrium. It takes two numpy.array objects. forces ==> [ [force1_x, force1_y], [force2_x, force2_y], ....] location ==> [ [x1, y1], [x2, y2], ....] >>> force = array([[1, 1], [-1, 2]]) >>> location = array([[1, 0], [10, 0]]) >>> in_static_equilibrium(force, location) False """ # summation of moments is zero moments: ndarray = cross(location, forces) sum_moments: float = sum(moments) return abs(sum_moments) < eps if __name__ == "__main__": # Test to check if it works forces = array( [polar_force(718.4, 180 - 30), polar_force(879.54, 45), polar_force(100, -90)] ) location = array([[0, 0], [0, 0], [0, 0]]) assert in_static_equilibrium(forces, location) # Problem 1 in image_data/2D_problems.jpg forces = array( [ polar_force(30 * 9.81, 15), polar_force(215, 180 - 45), polar_force(264, 90 - 30), ] ) location = array([[0, 0], [0, 0], [0, 0]]) assert in_static_equilibrium(forces, location) # Problem in image_data/2D_problems_1.jpg forces = array([[0, -2000], [0, -1200], [0, 15600], [0, -12400]]) location = array([[0, 0], [6, 0], [10, 0], [12, 0]]) assert in_static_equilibrium(forces, location) import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import json import requests from .fetch_github_info import AUTHENTICATED_USER_ENDPOINT, fetch_github_info def test_fetch_github_info(monkeypatch): class FakeResponse: def __init__(self, content) -> None: assert isinstance(content, (bytes, str)) self.content = content def json(self): return json.loads(self.content) def mock_response(*args, **kwargs): assert args[0] == AUTHENTICATED_USER_ENDPOINT assert "Authorization" in kwargs["headers"] assert kwargs["headers"]["Authorization"].startswith("token ") assert "Accept" in kwargs["headers"] return FakeResponse(b'{"login":"test","id":1}') monkeypatch.setattr(requests, "get", mock_response) result = fetch_github_info("token") assert result["login"] == "test" assert result["id"] == 1
import json import requests from .fetch_github_info import AUTHENTICATED_USER_ENDPOINT, fetch_github_info def test_fetch_github_info(monkeypatch): class FakeResponse: def __init__(self, content) -> None: assert isinstance(content, (bytes, str)) self.content = content def json(self): return json.loads(self.content) def mock_response(*args, **kwargs): assert args[0] == AUTHENTICATED_USER_ENDPOINT assert "Authorization" in kwargs["headers"] assert kwargs["headers"]["Authorization"].startswith("token ") assert "Accept" in kwargs["headers"] return FakeResponse(b'{"login":"test","id":1}') monkeypatch.setattr(requests, "get", mock_response) result = fetch_github_info("token") assert result["login"] == "test" assert result["id"] == 1
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# Created by susmith98 from collections import Counter from timeit import timeit # Problem Description: # Check if characters of the given string can be rearranged to form a palindrome. # Counter is faster for long strings and non-Counter is faster for short strings. def can_string_be_rearranged_as_palindrome_counter( input_str: str = "", ) -> bool: """ A Palindrome is a String that reads the same forward as it does backwards. Examples of Palindromes mom, dad, malayalam >>> can_string_be_rearranged_as_palindrome_counter("Momo") True >>> can_string_be_rearranged_as_palindrome_counter("Mother") False >>> can_string_be_rearranged_as_palindrome_counter("Father") False >>> can_string_be_rearranged_as_palindrome_counter("A man a plan a canal Panama") True """ return sum(c % 2 for c in Counter(input_str.replace(" ", "").lower()).values()) < 2 def can_string_be_rearranged_as_palindrome(input_str: str = "") -> bool: """ A Palindrome is a String that reads the same forward as it does backwards. Examples of Palindromes mom, dad, malayalam >>> can_string_be_rearranged_as_palindrome("Momo") True >>> can_string_be_rearranged_as_palindrome("Mother") False >>> can_string_be_rearranged_as_palindrome("Father") False >>> can_string_be_rearranged_as_palindrome_counter("A man a plan a canal Panama") True """ if len(input_str) == 0: return True lower_case_input_str = input_str.replace(" ", "").lower() # character_freq_dict: Stores the frequency of every character in the input string character_freq_dict: dict[str, int] = {} for character in lower_case_input_str: character_freq_dict[character] = character_freq_dict.get(character, 0) + 1 """ Above line of code is equivalent to: 1) Getting the frequency of current character till previous index >>> character_freq = character_freq_dict.get(character, 0) 2) Incrementing the frequency of current character by 1 >>> character_freq = character_freq + 1 3) Updating the frequency of current character >>> character_freq_dict[character] = character_freq """ """ OBSERVATIONS: Even length palindrome -> Every character appears even no.of times. Odd length palindrome -> Every character appears even no.of times except for one character. LOGIC: Step 1: We'll count number of characters that appear odd number of times i.e oddChar Step 2:If we find more than 1 character that appears odd number of times, It is not possible to rearrange as a palindrome """ oddChar = 0 for character_count in character_freq_dict.values(): if character_count % 2: oddChar += 1 if oddChar > 1: return False return True def benchmark(input_str: str = "") -> None: """ Benchmark code for comparing above 2 functions """ print("\nFor string = ", input_str, ":") print( "> can_string_be_rearranged_as_palindrome_counter()", "\tans =", can_string_be_rearranged_as_palindrome_counter(input_str), "\ttime =", timeit( "z.can_string_be_rearranged_as_palindrome_counter(z.check_str)", setup="import __main__ as z", ), "seconds", ) print( "> can_string_be_rearranged_as_palindrome()", "\tans =", can_string_be_rearranged_as_palindrome(input_str), "\ttime =", timeit( "z.can_string_be_rearranged_as_palindrome(z.check_str)", setup="import __main__ as z", ), "seconds", ) if __name__ == "__main__": check_str = input( "Enter string to determine if it can be rearranged as a palindrome or not: " ).strip() benchmark(check_str) status = can_string_be_rearranged_as_palindrome_counter(check_str) print(f"{check_str} can {'' if status else 'not '}be rearranged as a palindrome")
# Created by susmith98 from collections import Counter from timeit import timeit # Problem Description: # Check if characters of the given string can be rearranged to form a palindrome. # Counter is faster for long strings and non-Counter is faster for short strings. def can_string_be_rearranged_as_palindrome_counter( input_str: str = "", ) -> bool: """ A Palindrome is a String that reads the same forward as it does backwards. Examples of Palindromes mom, dad, malayalam >>> can_string_be_rearranged_as_palindrome_counter("Momo") True >>> can_string_be_rearranged_as_palindrome_counter("Mother") False >>> can_string_be_rearranged_as_palindrome_counter("Father") False >>> can_string_be_rearranged_as_palindrome_counter("A man a plan a canal Panama") True """ return sum(c % 2 for c in Counter(input_str.replace(" ", "").lower()).values()) < 2 def can_string_be_rearranged_as_palindrome(input_str: str = "") -> bool: """ A Palindrome is a String that reads the same forward as it does backwards. Examples of Palindromes mom, dad, malayalam >>> can_string_be_rearranged_as_palindrome("Momo") True >>> can_string_be_rearranged_as_palindrome("Mother") False >>> can_string_be_rearranged_as_palindrome("Father") False >>> can_string_be_rearranged_as_palindrome_counter("A man a plan a canal Panama") True """ if len(input_str) == 0: return True lower_case_input_str = input_str.replace(" ", "").lower() # character_freq_dict: Stores the frequency of every character in the input string character_freq_dict: dict[str, int] = {} for character in lower_case_input_str: character_freq_dict[character] = character_freq_dict.get(character, 0) + 1 """ Above line of code is equivalent to: 1) Getting the frequency of current character till previous index >>> character_freq = character_freq_dict.get(character, 0) 2) Incrementing the frequency of current character by 1 >>> character_freq = character_freq + 1 3) Updating the frequency of current character >>> character_freq_dict[character] = character_freq """ """ OBSERVATIONS: Even length palindrome -> Every character appears even no.of times. Odd length palindrome -> Every character appears even no.of times except for one character. LOGIC: Step 1: We'll count number of characters that appear odd number of times i.e oddChar Step 2:If we find more than 1 character that appears odd number of times, It is not possible to rearrange as a palindrome """ oddChar = 0 for character_count in character_freq_dict.values(): if character_count % 2: oddChar += 1 if oddChar > 1: return False return True def benchmark(input_str: str = "") -> None: """ Benchmark code for comparing above 2 functions """ print("\nFor string = ", input_str, ":") print( "> can_string_be_rearranged_as_palindrome_counter()", "\tans =", can_string_be_rearranged_as_palindrome_counter(input_str), "\ttime =", timeit( "z.can_string_be_rearranged_as_palindrome_counter(z.check_str)", setup="import __main__ as z", ), "seconds", ) print( "> can_string_be_rearranged_as_palindrome()", "\tans =", can_string_be_rearranged_as_palindrome(input_str), "\ttime =", timeit( "z.can_string_be_rearranged_as_palindrome(z.check_str)", setup="import __main__ as z", ), "seconds", ) if __name__ == "__main__": check_str = input( "Enter string to determine if it can be rearranged as a palindrome or not: " ).strip() benchmark(check_str) status = can_string_be_rearranged_as_palindrome_counter(check_str) print(f"{check_str} can {'' if status else 'not '}be rearranged as a palindrome")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# To get an insight into Greedy Algorithm through the Knapsack problem """ A shopkeeper has bags of wheat that each have different weights and different profits. eg. profit 5 8 7 1 12 3 4 weight 2 7 1 6 4 2 5 max_weight 100 Constraints: max_weight > 0 profit[i] >= 0 weight[i] >= 0 Calculate the maximum profit that the shopkeeper can make given maxmum weight that can be carried. """ def calc_profit(profit: list, weight: list, max_weight: int) -> int: """ Function description is as follows- :param profit: Take a list of profits :param weight: Take a list of weight if bags corresponding to the profits :param max_weight: Maximum weight that could be carried :return: Maximum expected gain >>> calc_profit([1, 2, 3], [3, 4, 5], 15) 6 >>> calc_profit([10, 9 , 8], [3 ,4 , 5], 25) 27 """ if len(profit) != len(weight): raise ValueError("The length of profit and weight must be same.") if max_weight <= 0: raise ValueError("max_weight must greater than zero.") if any(p < 0 for p in profit): raise ValueError("Profit can not be negative.") if any(w < 0 for w in weight): raise ValueError("Weight can not be negative.") # List created to store profit gained for the 1kg in case of each weight # respectively. Calculate and append profit/weight for each element. profit_by_weight = [p / w for p, w in zip(profit, weight)] # Creating a copy of the list and sorting profit/weight in ascending order sorted_profit_by_weight = sorted(profit_by_weight) # declaring useful variables length = len(sorted_profit_by_weight) limit = 0 gain = 0 i = 0 # loop till the total weight do not reach max limit e.g. 15 kg and till i<length while limit <= max_weight and i < length: # flag value for encountered greatest element in sorted_profit_by_weight biggest_profit_by_weight = sorted_profit_by_weight[length - i - 1] """ Calculate the index of the biggest_profit_by_weight in profit_by_weight list. This will give the index of the first encountered element which is same as of biggest_profit_by_weight. There may be one or more values same as that of biggest_profit_by_weight but index always encounter the very first element only. To curb this alter the values in profit_by_weight once they are used here it is done to -1 because neither profit nor weight can be in negative. """ index = profit_by_weight.index(biggest_profit_by_weight) profit_by_weight[index] = -1 # check if the weight encountered is less than the total weight # encountered before. if max_weight - limit >= weight[index]: limit += weight[index] # Adding profit gained for the given weight 1 === # weight[index]/weight[index] gain += 1 * profit[index] else: # Since the weight encountered is greater than limit, therefore take the # required number of remaining kgs and calculate profit for it. # weight remaining / weight[index] gain += (max_weight - limit) / weight[index] * profit[index] break i += 1 return gain if __name__ == "__main__": print( "Input profits, weights, and then max_weight (all positive ints) separated by " "spaces." ) profit = [int(x) for x in input("Input profits separated by spaces: ").split()] weight = [int(x) for x in input("Input weights separated by spaces: ").split()] max_weight = int(input("Max weight allowed: ")) # Function Call calc_profit(profit, weight, max_weight)
# To get an insight into Greedy Algorithm through the Knapsack problem """ A shopkeeper has bags of wheat that each have different weights and different profits. eg. profit 5 8 7 1 12 3 4 weight 2 7 1 6 4 2 5 max_weight 100 Constraints: max_weight > 0 profit[i] >= 0 weight[i] >= 0 Calculate the maximum profit that the shopkeeper can make given maxmum weight that can be carried. """ def calc_profit(profit: list, weight: list, max_weight: int) -> int: """ Function description is as follows- :param profit: Take a list of profits :param weight: Take a list of weight if bags corresponding to the profits :param max_weight: Maximum weight that could be carried :return: Maximum expected gain >>> calc_profit([1, 2, 3], [3, 4, 5], 15) 6 >>> calc_profit([10, 9 , 8], [3 ,4 , 5], 25) 27 """ if len(profit) != len(weight): raise ValueError("The length of profit and weight must be same.") if max_weight <= 0: raise ValueError("max_weight must greater than zero.") if any(p < 0 for p in profit): raise ValueError("Profit can not be negative.") if any(w < 0 for w in weight): raise ValueError("Weight can not be negative.") # List created to store profit gained for the 1kg in case of each weight # respectively. Calculate and append profit/weight for each element. profit_by_weight = [p / w for p, w in zip(profit, weight)] # Creating a copy of the list and sorting profit/weight in ascending order sorted_profit_by_weight = sorted(profit_by_weight) # declaring useful variables length = len(sorted_profit_by_weight) limit = 0 gain = 0 i = 0 # loop till the total weight do not reach max limit e.g. 15 kg and till i<length while limit <= max_weight and i < length: # flag value for encountered greatest element in sorted_profit_by_weight biggest_profit_by_weight = sorted_profit_by_weight[length - i - 1] """ Calculate the index of the biggest_profit_by_weight in profit_by_weight list. This will give the index of the first encountered element which is same as of biggest_profit_by_weight. There may be one or more values same as that of biggest_profit_by_weight but index always encounter the very first element only. To curb this alter the values in profit_by_weight once they are used here it is done to -1 because neither profit nor weight can be in negative. """ index = profit_by_weight.index(biggest_profit_by_weight) profit_by_weight[index] = -1 # check if the weight encountered is less than the total weight # encountered before. if max_weight - limit >= weight[index]: limit += weight[index] # Adding profit gained for the given weight 1 === # weight[index]/weight[index] gain += 1 * profit[index] else: # Since the weight encountered is greater than limit, therefore take the # required number of remaining kgs and calculate profit for it. # weight remaining / weight[index] gain += (max_weight - limit) / weight[index] * profit[index] break i += 1 return gain if __name__ == "__main__": print( "Input profits, weights, and then max_weight (all positive ints) separated by " "spaces." ) profit = [int(x) for x in input("Input profits separated by spaces: ").split()] weight = [int(x) for x in input("Input weights separated by spaces: ").split()] max_weight = int(input("Max weight allowed: ")) # Function Call calc_profit(profit, weight, max_weight)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Given an array of integer elements and an integer 'k', we are required to find the maximum sum of 'k' consecutive elements in the array. Instead of using a nested for loop, in a Brute force approach we will use a technique called 'Window sliding technique' where the nested loops can be converted to a single loop to reduce time complexity. """ from __future__ import annotations def max_sum_in_array(array: list[int], k: int) -> int: """ Returns the maximum sum of k consecutive elements >>> arr = [1, 4, 2, 10, 2, 3, 1, 0, 20] >>> k = 4 >>> max_sum_in_array(arr, k) 24 >>> k = 10 >>> max_sum_in_array(arr,k) Traceback (most recent call last): ... ValueError: Invalid Input >>> arr = [1, 4, 2, 10, 2, 13, 1, 0, 2] >>> k = 4 >>> max_sum_in_array(arr, k) 27 """ if len(array) < k or k < 0: raise ValueError("Invalid Input") max_sum = current_sum = sum(array[:k]) for i in range(len(array) - k): current_sum = current_sum - array[i] + array[i + k] max_sum = max(max_sum, current_sum) return max_sum if __name__ == "__main__": from doctest import testmod from random import randint testmod() array = [randint(-1000, 1000) for i in range(100)] k = randint(0, 110) print(f"The maximum sum of {k} consecutive elements is {max_sum_in_array(array,k)}")
""" Given an array of integer elements and an integer 'k', we are required to find the maximum sum of 'k' consecutive elements in the array. Instead of using a nested for loop, in a Brute force approach we will use a technique called 'Window sliding technique' where the nested loops can be converted to a single loop to reduce time complexity. """ from __future__ import annotations def max_sum_in_array(array: list[int], k: int) -> int: """ Returns the maximum sum of k consecutive elements >>> arr = [1, 4, 2, 10, 2, 3, 1, 0, 20] >>> k = 4 >>> max_sum_in_array(arr, k) 24 >>> k = 10 >>> max_sum_in_array(arr,k) Traceback (most recent call last): ... ValueError: Invalid Input >>> arr = [1, 4, 2, 10, 2, 13, 1, 0, 2] >>> k = 4 >>> max_sum_in_array(arr, k) 27 """ if len(array) < k or k < 0: raise ValueError("Invalid Input") max_sum = current_sum = sum(array[:k]) for i in range(len(array) - k): current_sum = current_sum - array[i] + array[i + k] max_sum = max(max_sum, current_sum) return max_sum if __name__ == "__main__": from doctest import testmod from random import randint testmod() array = [randint(-1000, 1000) for i in range(100)] k = randint(0, 110) print(f"The maximum sum of {k} consecutive elements is {max_sum_in_array(array,k)}")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from math import asin, atan, cos, radians, sin, sqrt, tan def haversine_distance(lat1: float, lon1: float, lat2: float, lon2: float) -> float: """ Calculate great circle distance between two points in a sphere, given longitudes and latitudes https://en.wikipedia.org/wiki/Haversine_formula We know that the globe is "sort of" spherical, so a path between two points isn't exactly a straight line. We need to account for the Earth's curvature when calculating distance from point A to B. This effect is negligible for small distances but adds up as distance increases. The Haversine method treats the earth as a sphere which allows us to "project" the two points A and B onto the surface of that sphere and approximate the spherical distance between them. Since the Earth is not a perfect sphere, other methods which model the Earth's ellipsoidal nature are more accurate but a quick and modifiable computation like Haversine can be handy for shorter range distances. Args: lat1, lon1: latitude and longitude of coordinate 1 lat2, lon2: latitude and longitude of coordinate 2 Returns: geographical distance between two points in metres >>> from collections import namedtuple >>> point_2d = namedtuple("point_2d", "lat lon") >>> SAN_FRANCISCO = point_2d(37.774856, -122.424227) >>> YOSEMITE = point_2d(37.864742, -119.537521) >>> f"{haversine_distance(*SAN_FRANCISCO, *YOSEMITE):0,.0f} meters" '254,352 meters' """ # CONSTANTS per WGS84 https://en.wikipedia.org/wiki/World_Geodetic_System # Distance in metres(m) AXIS_A = 6378137.0 AXIS_B = 6356752.314245 RADIUS = 6378137 # Equation parameters # Equation https://en.wikipedia.org/wiki/Haversine_formula#Formulation flattening = (AXIS_A - AXIS_B) / AXIS_A phi_1 = atan((1 - flattening) * tan(radians(lat1))) phi_2 = atan((1 - flattening) * tan(radians(lat2))) lambda_1 = radians(lon1) lambda_2 = radians(lon2) # Equation sin_sq_phi = sin((phi_2 - phi_1) / 2) sin_sq_lambda = sin((lambda_2 - lambda_1) / 2) # Square both values sin_sq_phi *= sin_sq_phi sin_sq_lambda *= sin_sq_lambda h_value = sqrt(sin_sq_phi + (cos(phi_1) * cos(phi_2) * sin_sq_lambda)) return 2 * RADIUS * asin(h_value) if __name__ == "__main__": import doctest doctest.testmod()
from math import asin, atan, cos, radians, sin, sqrt, tan def haversine_distance(lat1: float, lon1: float, lat2: float, lon2: float) -> float: """ Calculate great circle distance between two points in a sphere, given longitudes and latitudes https://en.wikipedia.org/wiki/Haversine_formula We know that the globe is "sort of" spherical, so a path between two points isn't exactly a straight line. We need to account for the Earth's curvature when calculating distance from point A to B. This effect is negligible for small distances but adds up as distance increases. The Haversine method treats the earth as a sphere which allows us to "project" the two points A and B onto the surface of that sphere and approximate the spherical distance between them. Since the Earth is not a perfect sphere, other methods which model the Earth's ellipsoidal nature are more accurate but a quick and modifiable computation like Haversine can be handy for shorter range distances. Args: lat1, lon1: latitude and longitude of coordinate 1 lat2, lon2: latitude and longitude of coordinate 2 Returns: geographical distance between two points in metres >>> from collections import namedtuple >>> point_2d = namedtuple("point_2d", "lat lon") >>> SAN_FRANCISCO = point_2d(37.774856, -122.424227) >>> YOSEMITE = point_2d(37.864742, -119.537521) >>> f"{haversine_distance(*SAN_FRANCISCO, *YOSEMITE):0,.0f} meters" '254,352 meters' """ # CONSTANTS per WGS84 https://en.wikipedia.org/wiki/World_Geodetic_System # Distance in metres(m) AXIS_A = 6378137.0 AXIS_B = 6356752.314245 RADIUS = 6378137 # Equation parameters # Equation https://en.wikipedia.org/wiki/Haversine_formula#Formulation flattening = (AXIS_A - AXIS_B) / AXIS_A phi_1 = atan((1 - flattening) * tan(radians(lat1))) phi_2 = atan((1 - flattening) * tan(radians(lat2))) lambda_1 = radians(lon1) lambda_2 = radians(lon2) # Equation sin_sq_phi = sin((phi_2 - phi_1) / 2) sin_sq_lambda = sin((lambda_2 - lambda_1) / 2) # Square both values sin_sq_phi *= sin_sq_phi sin_sq_lambda *= sin_sq_lambda h_value = sqrt(sin_sq_phi + (cos(phi_1) * cos(phi_2) * sin_sq_lambda)) return 2 * RADIUS * asin(h_value) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" This is a pure Python implementation of the merge-insertion sort algorithm Source: https://en.wikipedia.org/wiki/Graham_scan For doctests run following command: python3 -m doctest -v graham_scan.py """ from __future__ import annotations from collections import deque from enum import Enum from math import atan2, degrees from sys import maxsize def graham_scan(points: list[tuple[int, int]]) -> list[tuple[int, int]]: """Pure implementation of graham scan algorithm in Python :param points: The unique points on coordinates. :return: The points on convex hell. Examples: >>> graham_scan([(9, 6), (3, 1), (0, 0), (5, 5), (5, 2), (7, 0), (3, 3), (1, 4)]) [(0, 0), (7, 0), (9, 6), (5, 5), (1, 4)] >>> graham_scan([(0, 0), (1, 0), (1, 1), (0, 1)]) [(0, 0), (1, 0), (1, 1), (0, 1)] >>> graham_scan([(0, 0), (1, 1), (2, 2), (3, 3), (-1, 2)]) [(0, 0), (1, 1), (2, 2), (3, 3), (-1, 2)] >>> graham_scan([(-100, 20), (99, 3), (1, 10000001), (5133186, -25), (-66, -4)]) [(5133186, -25), (1, 10000001), (-100, 20), (-66, -4)] """ if len(points) <= 2: # There is no convex hull raise ValueError("graham_scan: argument must contain more than 3 points.") if len(points) == 3: return points # find the lowest and the most left point minidx = 0 miny, minx = maxsize, maxsize for i, point in enumerate(points): x = point[0] y = point[1] if y < miny: miny = y minx = x minidx = i if y == miny: if x < minx: minx = x minidx = i # remove the lowest and the most left point from points for preparing for sort points.pop(minidx) def angle_comparer(point: tuple[int, int], minx: int, miny: int) -> float: """Return the angle toward to point from (minx, miny) :param point: The target point minx: The starting point's x miny: The starting point's y :return: the angle Examples: >>> angle_comparer((1,1), 0, 0) 45.0 >>> angle_comparer((100,1), 10, 10) -5.710593137499642 >>> angle_comparer((5,5), 2, 3) 33.690067525979785 """ # sort the points accorgind to the angle from the lowest and the most left point x = point[0] y = point[1] angle = degrees(atan2(y - miny, x - minx)) return angle sorted_points = sorted(points, key=lambda point: angle_comparer(point, minx, miny)) # This insert actually costs complexity, # and you should instead add (minx, miny) into stack later. # I'm using insert just for easy understanding. sorted_points.insert(0, (minx, miny)) # traversal from the lowest and the most left point in anti-clockwise direction # if direction gets right, the previous point is not the convex hull. class Direction(Enum): left = 1 straight = 2 right = 3 def check_direction( starting: tuple[int, int], via: tuple[int, int], target: tuple[int, int] ) -> Direction: """Return the direction toward to the line from via to target from starting :param starting: The starting point via: The via point target: The target point :return: the Direction Examples: >>> check_direction((1,1), (2,2), (3,3)) Direction.straight >>> check_direction((60,1), (-50,199), (30,2)) Direction.left >>> check_direction((0,0), (5,5), (10,0)) Direction.right """ x0, y0 = starting x1, y1 = via x2, y2 = target via_angle = degrees(atan2(y1 - y0, x1 - x0)) if via_angle < 0: via_angle += 360 target_angle = degrees(atan2(y2 - y0, x2 - x0)) if target_angle < 0: target_angle += 360 # t- # \ \ # \ v # \| # s # via_angle is always lower than target_angle, if direction is left. # If they are same, it means they are on a same line of convex hull. if target_angle > via_angle: return Direction.left elif target_angle == via_angle: return Direction.straight else: return Direction.right stack: deque[tuple[int, int]] = deque() stack.append(sorted_points[0]) stack.append(sorted_points[1]) stack.append(sorted_points[2]) # In any ways, the first 3 points line are towards left. # Because we sort them the angle from minx, miny. current_direction = Direction.left for i in range(3, len(sorted_points)): while True: starting = stack[-2] via = stack[-1] target = sorted_points[i] next_direction = check_direction(starting, via, target) if next_direction == Direction.left: current_direction = Direction.left break if next_direction == Direction.straight: if current_direction == Direction.left: # We keep current_direction as left. # Because if the straight line keeps as straight, # we want to know if this straight line is towards left. break elif current_direction == Direction.right: # If the straight line is towards right, # every previous points on those straigh line is not convex hull. stack.pop() if next_direction == Direction.right: stack.pop() stack.append(sorted_points[i]) return list(stack)
""" This is a pure Python implementation of the merge-insertion sort algorithm Source: https://en.wikipedia.org/wiki/Graham_scan For doctests run following command: python3 -m doctest -v graham_scan.py """ from __future__ import annotations from collections import deque from enum import Enum from math import atan2, degrees from sys import maxsize def graham_scan(points: list[tuple[int, int]]) -> list[tuple[int, int]]: """Pure implementation of graham scan algorithm in Python :param points: The unique points on coordinates. :return: The points on convex hell. Examples: >>> graham_scan([(9, 6), (3, 1), (0, 0), (5, 5), (5, 2), (7, 0), (3, 3), (1, 4)]) [(0, 0), (7, 0), (9, 6), (5, 5), (1, 4)] >>> graham_scan([(0, 0), (1, 0), (1, 1), (0, 1)]) [(0, 0), (1, 0), (1, 1), (0, 1)] >>> graham_scan([(0, 0), (1, 1), (2, 2), (3, 3), (-1, 2)]) [(0, 0), (1, 1), (2, 2), (3, 3), (-1, 2)] >>> graham_scan([(-100, 20), (99, 3), (1, 10000001), (5133186, -25), (-66, -4)]) [(5133186, -25), (1, 10000001), (-100, 20), (-66, -4)] """ if len(points) <= 2: # There is no convex hull raise ValueError("graham_scan: argument must contain more than 3 points.") if len(points) == 3: return points # find the lowest and the most left point minidx = 0 miny, minx = maxsize, maxsize for i, point in enumerate(points): x = point[0] y = point[1] if y < miny: miny = y minx = x minidx = i if y == miny: if x < minx: minx = x minidx = i # remove the lowest and the most left point from points for preparing for sort points.pop(minidx) def angle_comparer(point: tuple[int, int], minx: int, miny: int) -> float: """Return the angle toward to point from (minx, miny) :param point: The target point minx: The starting point's x miny: The starting point's y :return: the angle Examples: >>> angle_comparer((1,1), 0, 0) 45.0 >>> angle_comparer((100,1), 10, 10) -5.710593137499642 >>> angle_comparer((5,5), 2, 3) 33.690067525979785 """ # sort the points accorgind to the angle from the lowest and the most left point x = point[0] y = point[1] angle = degrees(atan2(y - miny, x - minx)) return angle sorted_points = sorted(points, key=lambda point: angle_comparer(point, minx, miny)) # This insert actually costs complexity, # and you should instead add (minx, miny) into stack later. # I'm using insert just for easy understanding. sorted_points.insert(0, (minx, miny)) # traversal from the lowest and the most left point in anti-clockwise direction # if direction gets right, the previous point is not the convex hull. class Direction(Enum): left = 1 straight = 2 right = 3 def check_direction( starting: tuple[int, int], via: tuple[int, int], target: tuple[int, int] ) -> Direction: """Return the direction toward to the line from via to target from starting :param starting: The starting point via: The via point target: The target point :return: the Direction Examples: >>> check_direction((1,1), (2,2), (3,3)) Direction.straight >>> check_direction((60,1), (-50,199), (30,2)) Direction.left >>> check_direction((0,0), (5,5), (10,0)) Direction.right """ x0, y0 = starting x1, y1 = via x2, y2 = target via_angle = degrees(atan2(y1 - y0, x1 - x0)) if via_angle < 0: via_angle += 360 target_angle = degrees(atan2(y2 - y0, x2 - x0)) if target_angle < 0: target_angle += 360 # t- # \ \ # \ v # \| # s # via_angle is always lower than target_angle, if direction is left. # If they are same, it means they are on a same line of convex hull. if target_angle > via_angle: return Direction.left elif target_angle == via_angle: return Direction.straight else: return Direction.right stack: deque[tuple[int, int]] = deque() stack.append(sorted_points[0]) stack.append(sorted_points[1]) stack.append(sorted_points[2]) # In any ways, the first 3 points line are towards left. # Because we sort them the angle from minx, miny. current_direction = Direction.left for i in range(3, len(sorted_points)): while True: starting = stack[-2] via = stack[-1] target = sorted_points[i] next_direction = check_direction(starting, via, target) if next_direction == Direction.left: current_direction = Direction.left break if next_direction == Direction.straight: if current_direction == Direction.left: # We keep current_direction as left. # Because if the straight line keeps as straight, # we want to know if this straight line is towards left. break elif current_direction == Direction.right: # If the straight line is towards right, # every previous points on those straigh line is not convex hull. stack.pop() if next_direction == Direction.right: stack.pop() stack.append(sorted_points[i]) return list(stack)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Implementation of gaussian filter algorithm """ from itertools import product from cv2 import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey from numpy import dot, exp, mgrid, pi, ravel, square, uint8, zeros def gen_gaussian_kernel(k_size, sigma): center = k_size // 2 x, y = mgrid[0 - center : k_size - center, 0 - center : k_size - center] g = 1 / (2 * pi * sigma) * exp(-(square(x) + square(y)) / (2 * square(sigma))) return g def gaussian_filter(image, k_size, sigma): height, width = image.shape[0], image.shape[1] # dst image height and width dst_height = height - k_size + 1 dst_width = width - k_size + 1 # im2col, turn the k_size*k_size pixels into a row and np.vstack all rows image_array = zeros((dst_height * dst_width, k_size * k_size)) row = 0 for i, j in product(range(dst_height), range(dst_width)): window = ravel(image[i : i + k_size, j : j + k_size]) image_array[row, :] = window row += 1 # turn the kernel into shape(k*k, 1) gaussian_kernel = gen_gaussian_kernel(k_size, sigma) filter_array = ravel(gaussian_kernel) # reshape and get the dst image dst = dot(image_array, filter_array).reshape(dst_height, dst_width).astype(uint8) return dst if __name__ == "__main__": # read original image img = imread(r"../image_data/lena.jpg") # turn image in gray scale value gray = cvtColor(img, COLOR_BGR2GRAY) # get values with two different mask size gaussian3x3 = gaussian_filter(gray, 3, sigma=1) gaussian5x5 = gaussian_filter(gray, 5, sigma=0.8) # show result images imshow("gaussian filter with 3x3 mask", gaussian3x3) imshow("gaussian filter with 5x5 mask", gaussian5x5) waitKey()
""" Implementation of gaussian filter algorithm """ from itertools import product from cv2 import COLOR_BGR2GRAY, cvtColor, imread, imshow, waitKey from numpy import dot, exp, mgrid, pi, ravel, square, uint8, zeros def gen_gaussian_kernel(k_size, sigma): center = k_size // 2 x, y = mgrid[0 - center : k_size - center, 0 - center : k_size - center] g = 1 / (2 * pi * sigma) * exp(-(square(x) + square(y)) / (2 * square(sigma))) return g def gaussian_filter(image, k_size, sigma): height, width = image.shape[0], image.shape[1] # dst image height and width dst_height = height - k_size + 1 dst_width = width - k_size + 1 # im2col, turn the k_size*k_size pixels into a row and np.vstack all rows image_array = zeros((dst_height * dst_width, k_size * k_size)) row = 0 for i, j in product(range(dst_height), range(dst_width)): window = ravel(image[i : i + k_size, j : j + k_size]) image_array[row, :] = window row += 1 # turn the kernel into shape(k*k, 1) gaussian_kernel = gen_gaussian_kernel(k_size, sigma) filter_array = ravel(gaussian_kernel) # reshape and get the dst image dst = dot(image_array, filter_array).reshape(dst_height, dst_width).astype(uint8) return dst if __name__ == "__main__": # read original image img = imread(r"../image_data/lena.jpg") # turn image in gray scale value gray = cvtColor(img, COLOR_BGR2GRAY) # get values with two different mask size gaussian3x3 = gaussian_filter(gray, 3, sigma=1) gaussian5x5 = gaussian_filter(gray, 5, sigma=0.8) # show result images imshow("gaussian filter with 3x3 mask", gaussian3x3) imshow("gaussian filter with 5x5 mask", gaussian5x5) waitKey()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def quick_sort(data: list) -> list: """ >>> for data in ([2, 1, 0], [2.2, 1.1, 0], "quick_sort"): ... quick_sort(data) == sorted(data) True True True """ if len(data) <= 1: return data else: return ( quick_sort([e for e in data[1:] if e <= data[0]]) + [data[0]] + quick_sort([e for e in data[1:] if e > data[0]]) ) if __name__ == "__main__": import doctest doctest.testmod()
def quick_sort(data: list) -> list: """ >>> for data in ([2, 1, 0], [2.2, 1.1, 0], "quick_sort"): ... quick_sort(data) == sorted(data) True True True """ if len(data) <= 1: return data else: return ( quick_sort([e for e in data[1:] if e <= data[0]]) + [data[0]] + quick_sort([e for e in data[1:] if e > data[0]]) ) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
############################# # Author: Aravind Kashyap # File: lis.py # comments: This programme outputs the Longest Strictly Increasing Subsequence in # O(NLogN) Where N is the Number of elements in the list ############################# from __future__ import annotations def CeilIndex(v, l, r, key): # noqa: E741 while r - l > 1: m = (l + r) // 2 if v[m] >= key: r = m else: l = m # noqa: E741 return r def LongestIncreasingSubsequenceLength(v: list[int]) -> int: """ >>> LongestIncreasingSubsequenceLength([2, 5, 3, 7, 11, 8, 10, 13, 6]) 6 >>> LongestIncreasingSubsequenceLength([]) 0 >>> LongestIncreasingSubsequenceLength([0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, ... 11, 7, 15]) 6 >>> LongestIncreasingSubsequenceLength([5, 4, 3, 2, 1]) 1 """ if len(v) == 0: return 0 tail = [0] * len(v) length = 1 tail[0] = v[0] for i in range(1, len(v)): if v[i] < tail[0]: tail[0] = v[i] elif v[i] > tail[length - 1]: tail[length] = v[i] length += 1 else: tail[CeilIndex(tail, -1, length - 1, v[i])] = v[i] return length if __name__ == "__main__": import doctest doctest.testmod()
############################# # Author: Aravind Kashyap # File: lis.py # comments: This programme outputs the Longest Strictly Increasing Subsequence in # O(NLogN) Where N is the Number of elements in the list ############################# from __future__ import annotations def CeilIndex(v, l, r, key): # noqa: E741 while r - l > 1: m = (l + r) // 2 if v[m] >= key: r = m else: l = m # noqa: E741 return r def LongestIncreasingSubsequenceLength(v: list[int]) -> int: """ >>> LongestIncreasingSubsequenceLength([2, 5, 3, 7, 11, 8, 10, 13, 6]) 6 >>> LongestIncreasingSubsequenceLength([]) 0 >>> LongestIncreasingSubsequenceLength([0, 8, 4, 12, 2, 10, 6, 14, 1, 9, 5, 13, 3, ... 11, 7, 15]) 6 >>> LongestIncreasingSubsequenceLength([5, 4, 3, 2, 1]) 1 """ if len(v) == 0: return 0 tail = [0] * len(v) length = 1 tail[0] = v[0] for i in range(1, len(v)): if v[i] < tail[0]: tail[0] = v[i] elif v[i] > tail[length - 1]: tail[length] = v[i] length += 1 else: tail[CeilIndex(tail, -1, length - 1, v[i])] = v[i] return length if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
"""Queue represented by a Python list""" class Queue: def __init__(self): self.entries = [] self.length = 0 self.front = 0 def __str__(self): printed = "<" + str(self.entries)[1:-1] + ">" return printed """Enqueues {@code item} @param item item to enqueue""" def put(self, item): self.entries.append(item) self.length = self.length + 1 """Dequeues {@code item} @requirement: |self.length| > 0 @return dequeued item that was dequeued""" def get(self): self.length = self.length - 1 dequeued = self.entries[self.front] # self.front-=1 # self.entries = self.entries[self.front:] self.entries = self.entries[1:] return dequeued """Rotates the queue {@code rotation} times @param rotation number of times to rotate queue""" def rotate(self, rotation): for i in range(rotation): self.put(self.get()) """Enqueues {@code item} @return item at front of self.entries""" def get_front(self): return self.entries[0] """Returns the length of this.entries""" def size(self): return self.length
"""Queue represented by a Python list""" class Queue: def __init__(self): self.entries = [] self.length = 0 self.front = 0 def __str__(self): printed = "<" + str(self.entries)[1:-1] + ">" return printed """Enqueues {@code item} @param item item to enqueue""" def put(self, item): self.entries.append(item) self.length = self.length + 1 """Dequeues {@code item} @requirement: |self.length| > 0 @return dequeued item that was dequeued""" def get(self): self.length = self.length - 1 dequeued = self.entries[self.front] # self.front-=1 # self.entries = self.entries[self.front:] self.entries = self.entries[1:] return dequeued """Rotates the queue {@code rotation} times @param rotation number of times to rotate queue""" def rotate(self, rotation): for i in range(rotation): self.put(self.get()) """Enqueues {@code item} @return item at front of self.entries""" def get_front(self): return self.entries[0] """Returns the length of this.entries""" def size(self): return self.length
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def dencrypt(s: str, n: int = 13) -> str: """ https://en.wikipedia.org/wiki/ROT13 >>> msg = "My secret bank account number is 173-52946 so don't tell anyone!!" >>> s = dencrypt(msg) >>> s "Zl frperg onax nppbhag ahzore vf 173-52946 fb qba'g gryy nalbar!!" >>> dencrypt(s) == msg True """ out = "" for c in s: if "A" <= c <= "Z": out += chr(ord("A") + (ord(c) - ord("A") + n) % 26) elif "a" <= c <= "z": out += chr(ord("a") + (ord(c) - ord("a") + n) % 26) else: out += c return out def main() -> None: s0 = input("Enter message: ") s1 = dencrypt(s0, 13) print("Encryption:", s1) s2 = dencrypt(s1, 13) print("Decryption: ", s2) if __name__ == "__main__": import doctest doctest.testmod() main()
def dencrypt(s: str, n: int = 13) -> str: """ https://en.wikipedia.org/wiki/ROT13 >>> msg = "My secret bank account number is 173-52946 so don't tell anyone!!" >>> s = dencrypt(msg) >>> s "Zl frperg onax nppbhag ahzore vf 173-52946 fb qba'g gryy nalbar!!" >>> dencrypt(s) == msg True """ out = "" for c in s: if "A" <= c <= "Z": out += chr(ord("A") + (ord(c) - ord("A") + n) % 26) elif "a" <= c <= "z": out += chr(ord("a") + (ord(c) - ord("a") + n) % 26) else: out += c return out def main() -> None: s0 = input("Enter message: ") s1 = dencrypt(s0, 13) print("Encryption:", s1) s2 = dencrypt(s1, 13) print("Decryption: ", s2) if __name__ == "__main__": import doctest doctest.testmod() main()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" LCS Problem Statement: Given two sequences, find the length of longest subsequence present in both of them. A subsequence is a sequence that appears in the same relative order, but not necessarily continuous. Example:"abc", "abg" are subsequences of "abcdefgh". """ def longest_common_subsequence(x: str, y: str): """ Finds the longest common subsequence between two strings. Also returns the The subsequence found Parameters ---------- x: str, one of the strings y: str, the other string Returns ------- L[m][n]: int, the length of the longest subsequence. Also equal to len(seq) Seq: str, the subsequence found >>> longest_common_subsequence("programming", "gaming") (6, 'gaming') >>> longest_common_subsequence("physics", "smartphone") (2, 'ph') >>> longest_common_subsequence("computer", "food") (1, 'o') """ # find the length of strings assert x is not None assert y is not None m = len(x) n = len(y) # declaring the array for storing the dp values L = [[0] * (n + 1) for _ in range(m + 1)] for i in range(1, m + 1): for j in range(1, n + 1): if x[i - 1] == y[j - 1]: match = 1 else: match = 0 L[i][j] = max(L[i - 1][j], L[i][j - 1], L[i - 1][j - 1] + match) seq = "" i, j = m, n while i > 0 and j > 0: if x[i - 1] == y[j - 1]: match = 1 else: match = 0 if L[i][j] == L[i - 1][j - 1] + match: if match == 1: seq = x[i - 1] + seq i -= 1 j -= 1 elif L[i][j] == L[i - 1][j]: i -= 1 else: j -= 1 return L[m][n], seq if __name__ == "__main__": a = "AGGTAB" b = "GXTXAYB" expected_ln = 4 expected_subseq = "GTAB" ln, subseq = longest_common_subsequence(a, b) print("len =", ln, ", sub-sequence =", subseq) import doctest doctest.testmod()
""" LCS Problem Statement: Given two sequences, find the length of longest subsequence present in both of them. A subsequence is a sequence that appears in the same relative order, but not necessarily continuous. Example:"abc", "abg" are subsequences of "abcdefgh". """ def longest_common_subsequence(x: str, y: str): """ Finds the longest common subsequence between two strings. Also returns the The subsequence found Parameters ---------- x: str, one of the strings y: str, the other string Returns ------- L[m][n]: int, the length of the longest subsequence. Also equal to len(seq) Seq: str, the subsequence found >>> longest_common_subsequence("programming", "gaming") (6, 'gaming') >>> longest_common_subsequence("physics", "smartphone") (2, 'ph') >>> longest_common_subsequence("computer", "food") (1, 'o') """ # find the length of strings assert x is not None assert y is not None m = len(x) n = len(y) # declaring the array for storing the dp values L = [[0] * (n + 1) for _ in range(m + 1)] for i in range(1, m + 1): for j in range(1, n + 1): if x[i - 1] == y[j - 1]: match = 1 else: match = 0 L[i][j] = max(L[i - 1][j], L[i][j - 1], L[i - 1][j - 1] + match) seq = "" i, j = m, n while i > 0 and j > 0: if x[i - 1] == y[j - 1]: match = 1 else: match = 0 if L[i][j] == L[i - 1][j - 1] + match: if match == 1: seq = x[i - 1] + seq i -= 1 j -= 1 elif L[i][j] == L[i - 1][j]: i -= 1 else: j -= 1 return L[m][n], seq if __name__ == "__main__": a = "AGGTAB" b = "GXTXAYB" expected_ln = 4 expected_subseq = "GTAB" ln, subseq = longest_common_subsequence(a, b) print("len =", ln, ", sub-sequence =", subseq) import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Program to join a list of strings with a given separator """ def join(separator: str, separated: list[str]) -> str: """ >>> join("", ["a", "b", "c", "d"]) 'abcd' >>> join("#", ["a", "b", "c", "d"]) 'a#b#c#d' >>> join("#", "a") 'a' >>> join(" ", ["You", "are", "amazing!"]) 'You are amazing!' >>> join("#", ["a", "b", "c", 1]) Traceback (most recent call last): ... Exception: join() accepts only strings to be joined """ joined = "" for word_or_phrase in separated: if not isinstance(word_or_phrase, str): raise Exception("join() accepts only strings to be joined") joined += word_or_phrase + separator return joined.strip(separator) if __name__ == "__main__": from doctest import testmod testmod()
""" Program to join a list of strings with a given separator """ def join(separator: str, separated: list[str]) -> str: """ >>> join("", ["a", "b", "c", "d"]) 'abcd' >>> join("#", ["a", "b", "c", "d"]) 'a#b#c#d' >>> join("#", "a") 'a' >>> join(" ", ["You", "are", "amazing!"]) 'You are amazing!' >>> join("#", ["a", "b", "c", 1]) Traceback (most recent call last): ... Exception: join() accepts only strings to be joined """ joined = "" for word_or_phrase in separated: if not isinstance(word_or_phrase, str): raise Exception("join() accepts only strings to be joined") joined += word_or_phrase + separator return joined.strip(separator) if __name__ == "__main__": from doctest import testmod testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import sys """ Dynamic Programming Implementation of Matrix Chain Multiplication Time Complexity: O(n^3) Space Complexity: O(n^2) """ def MatrixChainOrder(array): N = len(array) Matrix = [[0 for x in range(N)] for x in range(N)] Sol = [[0 for x in range(N)] for x in range(N)] for ChainLength in range(2, N): for a in range(1, N - ChainLength + 1): b = a + ChainLength - 1 Matrix[a][b] = sys.maxsize for c in range(a, b): cost = ( Matrix[a][c] + Matrix[c + 1][b] + array[a - 1] * array[c] * array[b] ) if cost < Matrix[a][b]: Matrix[a][b] = cost Sol[a][b] = c return Matrix, Sol # Print order of matrix with Ai as Matrix def PrintOptimalSolution(OptimalSolution, i, j): if i == j: print("A" + str(i), end=" ") else: print("(", end=" ") PrintOptimalSolution(OptimalSolution, i, OptimalSolution[i][j]) PrintOptimalSolution(OptimalSolution, OptimalSolution[i][j] + 1, j) print(")", end=" ") def main(): array = [30, 35, 15, 5, 10, 20, 25] n = len(array) # Size of matrix created from above array will be # 30*35 35*15 15*5 5*10 10*20 20*25 Matrix, OptimalSolution = MatrixChainOrder(array) print("No. of Operation required: " + str(Matrix[1][n - 1])) PrintOptimalSolution(OptimalSolution, 1, n - 1) if __name__ == "__main__": main()
import sys """ Dynamic Programming Implementation of Matrix Chain Multiplication Time Complexity: O(n^3) Space Complexity: O(n^2) """ def MatrixChainOrder(array): N = len(array) Matrix = [[0 for x in range(N)] for x in range(N)] Sol = [[0 for x in range(N)] for x in range(N)] for ChainLength in range(2, N): for a in range(1, N - ChainLength + 1): b = a + ChainLength - 1 Matrix[a][b] = sys.maxsize for c in range(a, b): cost = ( Matrix[a][c] + Matrix[c + 1][b] + array[a - 1] * array[c] * array[b] ) if cost < Matrix[a][b]: Matrix[a][b] = cost Sol[a][b] = c return Matrix, Sol # Print order of matrix with Ai as Matrix def PrintOptimalSolution(OptimalSolution, i, j): if i == j: print("A" + str(i), end=" ") else: print("(", end=" ") PrintOptimalSolution(OptimalSolution, i, OptimalSolution[i][j]) PrintOptimalSolution(OptimalSolution, OptimalSolution[i][j] + 1, j) print(")", end=" ") def main(): array = [30, 35, 15, 5, 10, 20, 25] n = len(array) # Size of matrix created from above array will be # 30*35 35*15 15*5 5*10 10*20 20*25 Matrix, OptimalSolution = MatrixChainOrder(array) print("No. of Operation required: " + str(Matrix[1][n - 1])) PrintOptimalSolution(OptimalSolution, 1, n - 1) if __name__ == "__main__": main()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def isSumSubset(arr, arrLen, requiredSum): """ >>> isSumSubset([2, 4, 6, 8], 4, 5) False >>> isSumSubset([2, 4, 6, 8], 4, 14) True """ # a subset value says 1 if that subset sum can be formed else 0 # initially no subsets can be formed hence False/0 subset = [[False for i in range(requiredSum + 1)] for i in range(arrLen + 1)] # for each arr value, a sum of zero(0) can be formed by not taking any element # hence True/1 for i in range(arrLen + 1): subset[i][0] = True # sum is not zero and set is empty then false for i in range(1, requiredSum + 1): subset[0][i] = False for i in range(1, arrLen + 1): for j in range(1, requiredSum + 1): if arr[i - 1] > j: subset[i][j] = subset[i - 1][j] if arr[i - 1] <= j: subset[i][j] = subset[i - 1][j] or subset[i - 1][j - arr[i - 1]] # uncomment to print the subset # for i in range(arrLen+1): # print(subset[i]) print(subset[arrLen][requiredSum]) if __name__ == "__main__": import doctest doctest.testmod()
def isSumSubset(arr, arrLen, requiredSum): """ >>> isSumSubset([2, 4, 6, 8], 4, 5) False >>> isSumSubset([2, 4, 6, 8], 4, 14) True """ # a subset value says 1 if that subset sum can be formed else 0 # initially no subsets can be formed hence False/0 subset = [[False for i in range(requiredSum + 1)] for i in range(arrLen + 1)] # for each arr value, a sum of zero(0) can be formed by not taking any element # hence True/1 for i in range(arrLen + 1): subset[i][0] = True # sum is not zero and set is empty then false for i in range(1, requiredSum + 1): subset[0][i] = False for i in range(1, arrLen + 1): for j in range(1, requiredSum + 1): if arr[i - 1] > j: subset[i][j] = subset[i - 1][j] if arr[i - 1] <= j: subset[i][j] = subset[i - 1][j] or subset[i - 1][j - arr[i - 1]] # uncomment to print the subset # for i in range(arrLen+1): # print(subset[i]) print(subset[arrLen][requiredSum]) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/bin/sh # # An example hook script to prepare the commit log message. # Called by "git commit" with the name of the file that has the # commit message, followed by the description of the commit # message's source. The hook's purpose is to edit the commit # message file. If the hook fails with a non-zero status, # the commit is aborted. # # To enable this hook, rename this file to "prepare-commit-msg". # This hook includes three examples. The first one removes the # "# Please enter the commit message..." help message. # # The second includes the output of "git diff --name-status -r" # into the message, just before the "git status" output. It is # commented because it doesn't cope with --amend or with squashed # commits. # # The third example adds a Signed-off-by line to the message, that can # still be edited. This is rarely a good idea. COMMIT_MSG_FILE=$1 COMMIT_SOURCE=$2 SHA1=$3 /usr/bin/perl -i.bak -ne 'print unless(m/^. Please enter the commit message/..m/^#$/)' "$COMMIT_MSG_FILE" # case "$COMMIT_SOURCE,$SHA1" in # ,|template,) # /usr/bin/perl -i.bak -pe ' # print "\n" . `git diff --cached --name-status -r` # if /^#/ && $first++ == 0' "$COMMIT_MSG_FILE" ;; # *) ;; # esac # SOB=$(git var GIT_COMMITTER_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p') # git interpret-trailers --in-place --trailer "$SOB" "$COMMIT_MSG_FILE" # if test -z "$COMMIT_SOURCE" # then # /usr/bin/perl -i.bak -pe 'print "\n" if !$first_line++' "$COMMIT_MSG_FILE" # fi
#!/bin/sh # # An example hook script to prepare the commit log message. # Called by "git commit" with the name of the file that has the # commit message, followed by the description of the commit # message's source. The hook's purpose is to edit the commit # message file. If the hook fails with a non-zero status, # the commit is aborted. # # To enable this hook, rename this file to "prepare-commit-msg". # This hook includes three examples. The first one removes the # "# Please enter the commit message..." help message. # # The second includes the output of "git diff --name-status -r" # into the message, just before the "git status" output. It is # commented because it doesn't cope with --amend or with squashed # commits. # # The third example adds a Signed-off-by line to the message, that can # still be edited. This is rarely a good idea. COMMIT_MSG_FILE=$1 COMMIT_SOURCE=$2 SHA1=$3 /usr/bin/perl -i.bak -ne 'print unless(m/^. Please enter the commit message/..m/^#$/)' "$COMMIT_MSG_FILE" # case "$COMMIT_SOURCE,$SHA1" in # ,|template,) # /usr/bin/perl -i.bak -pe ' # print "\n" . `git diff --cached --name-status -r` # if /^#/ && $first++ == 0' "$COMMIT_MSG_FILE" ;; # *) ;; # esac # SOB=$(git var GIT_COMMITTER_IDENT | sed -n 's/^\(.*>\).*$/Signed-off-by: \1/p') # git interpret-trailers --in-place --trailer "$SOB" "$COMMIT_MSG_FILE" # if test -z "$COMMIT_SOURCE" # then # /usr/bin/perl -i.bak -pe 'print "\n" if !$first_line++' "$COMMIT_MSG_FILE" # fi
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Description The Koch snowflake is a fractal curve and one of the earliest fractals to have been described. The Koch snowflake can be built up iteratively, in a sequence of stages. The first stage is an equilateral triangle, and each successive stage is formed by adding outward bends to each side of the previous stage, making smaller equilateral triangles. This can be achieved through the following steps for each line: 1. divide the line segment into three segments of equal length. 2. draw an equilateral triangle that has the middle segment from step 1 as its base and points outward. 3. remove the line segment that is the base of the triangle from step 2. (description adapted from https://en.wikipedia.org/wiki/Koch_snowflake ) (for a more detailed explanation and an implementation in the Processing language, see https://natureofcode.com/book/chapter-8-fractals/ #84-the-koch-curve-and-the-arraylist-technique ) Requirements (pip): - matplotlib - numpy """ from __future__ import annotations import matplotlib.pyplot as plt # type: ignore import numpy # initial triangle of Koch snowflake VECTOR_1 = numpy.array([0, 0]) VECTOR_2 = numpy.array([0.5, 0.8660254]) VECTOR_3 = numpy.array([1, 0]) INITIAL_VECTORS = [VECTOR_1, VECTOR_2, VECTOR_3, VECTOR_1] # uncomment for simple Koch curve instead of Koch snowflake # INITIAL_VECTORS = [VECTOR_1, VECTOR_3] def iterate(initial_vectors: list[numpy.ndarray], steps: int) -> list[numpy.ndarray]: """ Go through the number of iterations determined by the argument "steps". Be careful with high values (above 5) since the time to calculate increases exponentially. >>> iterate([numpy.array([0, 0]), numpy.array([1, 0])], 1) [array([0, 0]), array([0.33333333, 0. ]), array([0.5 , \ 0.28867513]), array([0.66666667, 0. ]), array([1, 0])] """ vectors = initial_vectors for i in range(steps): vectors = iteration_step(vectors) return vectors def iteration_step(vectors: list[numpy.ndarray]) -> list[numpy.ndarray]: """ Loops through each pair of adjacent vectors. Each line between two adjacent vectors is divided into 4 segments by adding 3 additional vectors in-between the original two vectors. The vector in the middle is constructed through a 60 degree rotation so it is bent outwards. >>> iteration_step([numpy.array([0, 0]), numpy.array([1, 0])]) [array([0, 0]), array([0.33333333, 0. ]), array([0.5 , \ 0.28867513]), array([0.66666667, 0. ]), array([1, 0])] """ new_vectors = [] for i, start_vector in enumerate(vectors[:-1]): end_vector = vectors[i + 1] new_vectors.append(start_vector) difference_vector = end_vector - start_vector new_vectors.append(start_vector + difference_vector / 3) new_vectors.append( start_vector + difference_vector / 3 + rotate(difference_vector / 3, 60) ) new_vectors.append(start_vector + difference_vector * 2 / 3) new_vectors.append(vectors[-1]) return new_vectors def rotate(vector: numpy.ndarray, angle_in_degrees: float) -> numpy.ndarray: """ Standard rotation of a 2D vector with a rotation matrix (see https://en.wikipedia.org/wiki/Rotation_matrix ) >>> rotate(numpy.array([1, 0]), 60) array([0.5 , 0.8660254]) >>> rotate(numpy.array([1, 0]), 90) array([6.123234e-17, 1.000000e+00]) """ theta = numpy.radians(angle_in_degrees) c, s = numpy.cos(theta), numpy.sin(theta) rotation_matrix = numpy.array(((c, -s), (s, c))) return numpy.dot(rotation_matrix, vector) def plot(vectors: list[numpy.ndarray]) -> None: """ Utility function to plot the vectors using matplotlib.pyplot No doctest was implemented since this function does not have a return value """ # avoid stretched display of graph axes = plt.gca() axes.set_aspect("equal") # matplotlib.pyplot.plot takes a list of all x-coordinates and a list of all # y-coordinates as inputs, which are constructed from the vector-list using # zip() x_coordinates, y_coordinates = zip(*vectors) plt.plot(x_coordinates, y_coordinates) plt.show() if __name__ == "__main__": import doctest doctest.testmod() processed_vectors = iterate(INITIAL_VECTORS, 5) plot(processed_vectors)
""" Description The Koch snowflake is a fractal curve and one of the earliest fractals to have been described. The Koch snowflake can be built up iteratively, in a sequence of stages. The first stage is an equilateral triangle, and each successive stage is formed by adding outward bends to each side of the previous stage, making smaller equilateral triangles. This can be achieved through the following steps for each line: 1. divide the line segment into three segments of equal length. 2. draw an equilateral triangle that has the middle segment from step 1 as its base and points outward. 3. remove the line segment that is the base of the triangle from step 2. (description adapted from https://en.wikipedia.org/wiki/Koch_snowflake ) (for a more detailed explanation and an implementation in the Processing language, see https://natureofcode.com/book/chapter-8-fractals/ #84-the-koch-curve-and-the-arraylist-technique ) Requirements (pip): - matplotlib - numpy """ from __future__ import annotations import matplotlib.pyplot as plt # type: ignore import numpy # initial triangle of Koch snowflake VECTOR_1 = numpy.array([0, 0]) VECTOR_2 = numpy.array([0.5, 0.8660254]) VECTOR_3 = numpy.array([1, 0]) INITIAL_VECTORS = [VECTOR_1, VECTOR_2, VECTOR_3, VECTOR_1] # uncomment for simple Koch curve instead of Koch snowflake # INITIAL_VECTORS = [VECTOR_1, VECTOR_3] def iterate(initial_vectors: list[numpy.ndarray], steps: int) -> list[numpy.ndarray]: """ Go through the number of iterations determined by the argument "steps". Be careful with high values (above 5) since the time to calculate increases exponentially. >>> iterate([numpy.array([0, 0]), numpy.array([1, 0])], 1) [array([0, 0]), array([0.33333333, 0. ]), array([0.5 , \ 0.28867513]), array([0.66666667, 0. ]), array([1, 0])] """ vectors = initial_vectors for i in range(steps): vectors = iteration_step(vectors) return vectors def iteration_step(vectors: list[numpy.ndarray]) -> list[numpy.ndarray]: """ Loops through each pair of adjacent vectors. Each line between two adjacent vectors is divided into 4 segments by adding 3 additional vectors in-between the original two vectors. The vector in the middle is constructed through a 60 degree rotation so it is bent outwards. >>> iteration_step([numpy.array([0, 0]), numpy.array([1, 0])]) [array([0, 0]), array([0.33333333, 0. ]), array([0.5 , \ 0.28867513]), array([0.66666667, 0. ]), array([1, 0])] """ new_vectors = [] for i, start_vector in enumerate(vectors[:-1]): end_vector = vectors[i + 1] new_vectors.append(start_vector) difference_vector = end_vector - start_vector new_vectors.append(start_vector + difference_vector / 3) new_vectors.append( start_vector + difference_vector / 3 + rotate(difference_vector / 3, 60) ) new_vectors.append(start_vector + difference_vector * 2 / 3) new_vectors.append(vectors[-1]) return new_vectors def rotate(vector: numpy.ndarray, angle_in_degrees: float) -> numpy.ndarray: """ Standard rotation of a 2D vector with a rotation matrix (see https://en.wikipedia.org/wiki/Rotation_matrix ) >>> rotate(numpy.array([1, 0]), 60) array([0.5 , 0.8660254]) >>> rotate(numpy.array([1, 0]), 90) array([6.123234e-17, 1.000000e+00]) """ theta = numpy.radians(angle_in_degrees) c, s = numpy.cos(theta), numpy.sin(theta) rotation_matrix = numpy.array(((c, -s), (s, c))) return numpy.dot(rotation_matrix, vector) def plot(vectors: list[numpy.ndarray]) -> None: """ Utility function to plot the vectors using matplotlib.pyplot No doctest was implemented since this function does not have a return value """ # avoid stretched display of graph axes = plt.gca() axes.set_aspect("equal") # matplotlib.pyplot.plot takes a list of all x-coordinates and a list of all # y-coordinates as inputs, which are constructed from the vector-list using # zip() x_coordinates, y_coordinates = zip(*vectors) plt.plot(x_coordinates, y_coordinates) plt.show() if __name__ == "__main__": import doctest doctest.testmod() processed_vectors = iterate(INITIAL_VECTORS, 5) plot(processed_vectors)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Project Euler Problem 5: https://projecteuler.net/problem=5 Smallest multiple 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is _evenly divisible_ by all of the numbers from 1 to 20? References: - https://en.wiktionary.org/wiki/evenly_divisible """ def solution(n: int = 20) -> int: """ Returns the smallest positive number that is evenly divisible (divisible with no remainder) by all of the numbers from 1 to n. >>> solution(10) 2520 >>> solution(15) 360360 >>> solution(22) 232792560 >>> solution(3.4) 6 >>> solution(0) Traceback (most recent call last): ... ValueError: Parameter n must be greater than or equal to one. >>> solution(-17) Traceback (most recent call last): ... ValueError: Parameter n must be greater than or equal to one. >>> solution([]) Traceback (most recent call last): ... TypeError: Parameter n must be int or castable to int. >>> solution("asd") Traceback (most recent call last): ... TypeError: Parameter n must be int or castable to int. """ try: n = int(n) except (TypeError, ValueError): raise TypeError("Parameter n must be int or castable to int.") if n <= 0: raise ValueError("Parameter n must be greater than or equal to one.") i = 0 while 1: i += n * (n - 1) nfound = 0 for j in range(2, n): if i % j != 0: nfound = 1 break if nfound == 0: if i == 0: i = 1 return i if __name__ == "__main__": print(f"{solution() = }")
""" Project Euler Problem 5: https://projecteuler.net/problem=5 Smallest multiple 2520 is the smallest number that can be divided by each of the numbers from 1 to 10 without any remainder. What is the smallest positive number that is _evenly divisible_ by all of the numbers from 1 to 20? References: - https://en.wiktionary.org/wiki/evenly_divisible """ def solution(n: int = 20) -> int: """ Returns the smallest positive number that is evenly divisible (divisible with no remainder) by all of the numbers from 1 to n. >>> solution(10) 2520 >>> solution(15) 360360 >>> solution(22) 232792560 >>> solution(3.4) 6 >>> solution(0) Traceback (most recent call last): ... ValueError: Parameter n must be greater than or equal to one. >>> solution(-17) Traceback (most recent call last): ... ValueError: Parameter n must be greater than or equal to one. >>> solution([]) Traceback (most recent call last): ... TypeError: Parameter n must be int or castable to int. >>> solution("asd") Traceback (most recent call last): ... TypeError: Parameter n must be int or castable to int. """ try: n = int(n) except (TypeError, ValueError): raise TypeError("Parameter n must be int or castable to int.") if n <= 0: raise ValueError("Parameter n must be greater than or equal to one.") i = 0 while 1: i += n * (n - 1) nfound = 0 for j in range(2, n): if i % j != 0: nfound = 1 break if nfound == 0: if i == 0: i = 1 return i if __name__ == "__main__": print(f"{solution() = }")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# Author: Phyllipe Bezerra (https://github.com/pmba) clothes = { 0: "underwear", 1: "pants", 2: "belt", 3: "suit", 4: "shoe", 5: "socks", 6: "shirt", 7: "tie", 8: "watch", } graph = [[1, 4], [2, 4], [3], [], [], [4], [2, 7], [3], []] visited = [0 for x in range(len(graph))] stack = [] def print_stack(stack, clothes): order = 1 while stack: current_clothing = stack.pop() print(order, clothes[current_clothing]) order += 1 def depth_first_search(u, visited, graph): visited[u] = 1 for v in graph[u]: if not visited[v]: depth_first_search(v, visited, graph) stack.append(u) def topological_sort(graph, visited): for v in range(len(graph)): if not visited[v]: depth_first_search(v, visited, graph) if __name__ == "__main__": topological_sort(graph, visited) print(stack) print_stack(stack, clothes)
# Author: Phyllipe Bezerra (https://github.com/pmba) clothes = { 0: "underwear", 1: "pants", 2: "belt", 3: "suit", 4: "shoe", 5: "socks", 6: "shirt", 7: "tie", 8: "watch", } graph = [[1, 4], [2, 4], [3], [], [], [4], [2, 7], [3], []] visited = [0 for x in range(len(graph))] stack = [] def print_stack(stack, clothes): order = 1 while stack: current_clothing = stack.pop() print(order, clothes[current_clothing]) order += 1 def depth_first_search(u, visited, graph): visited[u] = 1 for v in graph[u]: if not visited[v]: depth_first_search(v, visited, graph) stack.append(u) def topological_sort(graph, visited): for v in range(len(graph)): if not visited[v]: depth_first_search(v, visited, graph) if __name__ == "__main__": topological_sort(graph, visited) print(stack) print_stack(stack, clothes)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Project Euler Problem 27 https://projecteuler.net/problem=27 Problem Statement: Euler discovered the remarkable quadratic formula: n2 + n + 41 It turns out that the formula will produce 40 primes for the consecutive values n = 0 to 39. However, when n = 40, 402 + 40 + 41 = 40(40 + 1) + 41 is divisible by 41, and certainly when n = 41, 412 + 41 + 41 is clearly divisible by 41. The incredible formula n2 − 79n + 1601 was discovered, which produces 80 primes for the consecutive values n = 0 to 79. The product of the coefficients, −79 and 1601, is −126479. Considering quadratics of the form: n² + an + b, where |a| &lt; 1000 and |b| &lt; 1000 where |n| is the modulus/absolute value of ne.g. |11| = 11 and |−4| = 4 Find the product of the coefficients, a and b, for the quadratic expression that produces the maximum number of primes for consecutive values of n, starting with n = 0. """ import math def is_prime(k: int) -> bool: """ Determine if a number is prime >>> is_prime(10) False >>> is_prime(11) True """ if k < 2 or k % 2 == 0: return False elif k == 2: return True else: for x in range(3, int(math.sqrt(k) + 1), 2): if k % x == 0: return False return True def solution(a_limit: int = 1000, b_limit: int = 1000) -> int: """ >>> solution(1000, 1000) -59231 >>> solution(200, 1000) -59231 >>> solution(200, 200) -4925 >>> solution(-1000, 1000) 0 >>> solution(-1000, -1000) 0 """ longest = [0, 0, 0] # length, a, b for a in range((a_limit * -1) + 1, a_limit): for b in range(2, b_limit): if is_prime(b): count = 0 n = 0 while is_prime((n ** 2) + (a * n) + b): count += 1 n += 1 if count > longest[0]: longest = [count, a, b] ans = longest[1] * longest[2] return ans if __name__ == "__main__": print(solution(1000, 1000))
""" Project Euler Problem 27 https://projecteuler.net/problem=27 Problem Statement: Euler discovered the remarkable quadratic formula: n2 + n + 41 It turns out that the formula will produce 40 primes for the consecutive values n = 0 to 39. However, when n = 40, 402 + 40 + 41 = 40(40 + 1) + 41 is divisible by 41, and certainly when n = 41, 412 + 41 + 41 is clearly divisible by 41. The incredible formula n2 − 79n + 1601 was discovered, which produces 80 primes for the consecutive values n = 0 to 79. The product of the coefficients, −79 and 1601, is −126479. Considering quadratics of the form: n² + an + b, where |a| &lt; 1000 and |b| &lt; 1000 where |n| is the modulus/absolute value of ne.g. |11| = 11 and |−4| = 4 Find the product of the coefficients, a and b, for the quadratic expression that produces the maximum number of primes for consecutive values of n, starting with n = 0. """ import math def is_prime(k: int) -> bool: """ Determine if a number is prime >>> is_prime(10) False >>> is_prime(11) True """ if k < 2 or k % 2 == 0: return False elif k == 2: return True else: for x in range(3, int(math.sqrt(k) + 1), 2): if k % x == 0: return False return True def solution(a_limit: int = 1000, b_limit: int = 1000) -> int: """ >>> solution(1000, 1000) -59231 >>> solution(200, 1000) -59231 >>> solution(200, 200) -4925 >>> solution(-1000, 1000) 0 >>> solution(-1000, -1000) 0 """ longest = [0, 0, 0] # length, a, b for a in range((a_limit * -1) + 1, a_limit): for b in range(2, b_limit): if is_prime(b): count = 0 n = 0 while is_prime((n ** 2) + (a * n) + b): count += 1 n += 1 if count > longest[0]: longest = [count, a, b] ans = longest[1] * longest[2] return ans if __name__ == "__main__": print(solution(1000, 1000))
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import numpy as np def power_iteration( input_matrix: np.ndarray, vector: np.ndarray, error_tol: float = 1e-12, max_iterations: int = 100, ) -> tuple[float, np.ndarray]: """ Power Iteration. Find the largest eignevalue and corresponding eigenvector of matrix input_matrix given a random vector in the same space. Will work so long as vector has component of largest eigenvector. input_matrix must be symmetric. Input input_matrix: input matrix whose largest eigenvalue we will find. Numpy array. np.shape(input_matrix) == (N,N). vector: random initial vector in same space as matrix. Numpy array. np.shape(vector) == (N,) or (N,1) Output largest_eigenvalue: largest eigenvalue of the matrix input_matrix. Float. Scalar. largest_eigenvector: eigenvector corresponding to largest_eigenvalue. Numpy array. np.shape(largest_eigenvector) == (N,) or (N,1). >>> import numpy as np >>> input_matrix = np.array([ ... [41, 4, 20], ... [ 4, 26, 30], ... [20, 30, 50] ... ]) >>> vector = np.array([41,4,20]) >>> power_iteration(input_matrix,vector) (79.66086378788381, array([0.44472726, 0.46209842, 0.76725662])) """ # Ensure matrix is square. assert np.shape(input_matrix)[0] == np.shape(input_matrix)[1] # Ensure proper dimensionality. assert np.shape(input_matrix)[0] == np.shape(vector)[0] # Set convergence to False. Will define convergence when we exceed max_iterations # or when we have small changes from one iteration to next. convergence = False lamda_previous = 0 iterations = 0 error = 1e12 while not convergence: # Multiple matrix by the vector. w = np.dot(input_matrix, vector) # Normalize the resulting output vector. vector = w / np.linalg.norm(w) # Find rayleigh quotient # (faster than usual b/c we know vector is normalized already) lamda = np.dot(vector.T, np.dot(input_matrix, vector)) # Check convergence. error = np.abs(lamda - lamda_previous) / lamda iterations += 1 if error <= error_tol or iterations >= max_iterations: convergence = True lamda_previous = lamda return lamda, vector def test_power_iteration() -> None: """ >>> test_power_iteration() # self running tests """ # Our implementation. input_matrix = np.array([[41, 4, 20], [4, 26, 30], [20, 30, 50]]) vector = np.array([41, 4, 20]) eigen_value, eigen_vector = power_iteration(input_matrix, vector) # Numpy implementation. # Get eigen values and eigen vectors using built in numpy # eigh (eigh used for symmetric or hermetian matrices). eigen_values, eigen_vectors = np.linalg.eigh(input_matrix) # Last eigen value is the maximum one. eigen_value_max = eigen_values[-1] # Last column in this matrix is eigen vector corresponding to largest eigen value. eigen_vector_max = eigen_vectors[:, -1] # Check our implementation and numpy gives close answers. assert np.abs(eigen_value - eigen_value_max) <= 1e-6 # Take absolute values element wise of each eigenvector. # as they are only unique to a minus sign. assert np.linalg.norm(np.abs(eigen_vector) - np.abs(eigen_vector_max)) <= 1e-6 if __name__ == "__main__": import doctest doctest.testmod() test_power_iteration()
import numpy as np def power_iteration( input_matrix: np.ndarray, vector: np.ndarray, error_tol: float = 1e-12, max_iterations: int = 100, ) -> tuple[float, np.ndarray]: """ Power Iteration. Find the largest eignevalue and corresponding eigenvector of matrix input_matrix given a random vector in the same space. Will work so long as vector has component of largest eigenvector. input_matrix must be symmetric. Input input_matrix: input matrix whose largest eigenvalue we will find. Numpy array. np.shape(input_matrix) == (N,N). vector: random initial vector in same space as matrix. Numpy array. np.shape(vector) == (N,) or (N,1) Output largest_eigenvalue: largest eigenvalue of the matrix input_matrix. Float. Scalar. largest_eigenvector: eigenvector corresponding to largest_eigenvalue. Numpy array. np.shape(largest_eigenvector) == (N,) or (N,1). >>> import numpy as np >>> input_matrix = np.array([ ... [41, 4, 20], ... [ 4, 26, 30], ... [20, 30, 50] ... ]) >>> vector = np.array([41,4,20]) >>> power_iteration(input_matrix,vector) (79.66086378788381, array([0.44472726, 0.46209842, 0.76725662])) """ # Ensure matrix is square. assert np.shape(input_matrix)[0] == np.shape(input_matrix)[1] # Ensure proper dimensionality. assert np.shape(input_matrix)[0] == np.shape(vector)[0] # Set convergence to False. Will define convergence when we exceed max_iterations # or when we have small changes from one iteration to next. convergence = False lamda_previous = 0 iterations = 0 error = 1e12 while not convergence: # Multiple matrix by the vector. w = np.dot(input_matrix, vector) # Normalize the resulting output vector. vector = w / np.linalg.norm(w) # Find rayleigh quotient # (faster than usual b/c we know vector is normalized already) lamda = np.dot(vector.T, np.dot(input_matrix, vector)) # Check convergence. error = np.abs(lamda - lamda_previous) / lamda iterations += 1 if error <= error_tol or iterations >= max_iterations: convergence = True lamda_previous = lamda return lamda, vector def test_power_iteration() -> None: """ >>> test_power_iteration() # self running tests """ # Our implementation. input_matrix = np.array([[41, 4, 20], [4, 26, 30], [20, 30, 50]]) vector = np.array([41, 4, 20]) eigen_value, eigen_vector = power_iteration(input_matrix, vector) # Numpy implementation. # Get eigen values and eigen vectors using built in numpy # eigh (eigh used for symmetric or hermetian matrices). eigen_values, eigen_vectors = np.linalg.eigh(input_matrix) # Last eigen value is the maximum one. eigen_value_max = eigen_values[-1] # Last column in this matrix is eigen vector corresponding to largest eigen value. eigen_vector_max = eigen_vectors[:, -1] # Check our implementation and numpy gives close answers. assert np.abs(eigen_value - eigen_value_max) <= 1e-6 # Take absolute values element wise of each eigenvector. # as they are only unique to a minus sign. assert np.linalg.norm(np.abs(eigen_vector) - np.abs(eigen_vector_max)) <= 1e-6 if __name__ == "__main__": import doctest doctest.testmod() test_power_iteration()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Is IP v4 address valid? A valid IP address must be four octets in the form of A.B.C.D, where A,B,C and D are numbers from 0-254 for example: 192.168.23.1, 172.254.254.254 are valid IP address 192.168.255.0, 255.192.3.121 are invalid IP address """ def is_ip_v4_address_valid(ip_v4_address: str) -> bool: """ print "Valid IP address" If IP is valid. or print "Invalid IP address" If IP is invalid. >>> is_ip_v4_address_valid("192.168.0.23") True >>> is_ip_v4_address_valid("192.255.15.8") False >>> is_ip_v4_address_valid("172.100.0.8") True >>> is_ip_v4_address_valid("254.255.0.255") False >>> is_ip_v4_address_valid("1.2.33333333.4") False >>> is_ip_v4_address_valid("1.2.-3.4") False >>> is_ip_v4_address_valid("1.2.3") False >>> is_ip_v4_address_valid("1.2.3.4.5") False >>> is_ip_v4_address_valid("1.2.A.4") False >>> is_ip_v4_address_valid("0.0.0.0") True >>> is_ip_v4_address_valid("1.2.3.") False """ octets = [int(i) for i in ip_v4_address.split(".") if i.isdigit()] return len(octets) == 4 and all(0 <= int(octet) <= 254 for octet in octets) if __name__ == "__main__": ip = input().strip() valid_or_invalid = "valid" if is_ip_v4_address_valid(ip) else "invalid" print(f"{ip} is a {valid_or_invalid} IP v4 address.")
""" Is IP v4 address valid? A valid IP address must be four octets in the form of A.B.C.D, where A,B,C and D are numbers from 0-254 for example: 192.168.23.1, 172.254.254.254 are valid IP address 192.168.255.0, 255.192.3.121 are invalid IP address """ def is_ip_v4_address_valid(ip_v4_address: str) -> bool: """ print "Valid IP address" If IP is valid. or print "Invalid IP address" If IP is invalid. >>> is_ip_v4_address_valid("192.168.0.23") True >>> is_ip_v4_address_valid("192.255.15.8") False >>> is_ip_v4_address_valid("172.100.0.8") True >>> is_ip_v4_address_valid("254.255.0.255") False >>> is_ip_v4_address_valid("1.2.33333333.4") False >>> is_ip_v4_address_valid("1.2.-3.4") False >>> is_ip_v4_address_valid("1.2.3") False >>> is_ip_v4_address_valid("1.2.3.4.5") False >>> is_ip_v4_address_valid("1.2.A.4") False >>> is_ip_v4_address_valid("0.0.0.0") True >>> is_ip_v4_address_valid("1.2.3.") False """ octets = [int(i) for i in ip_v4_address.split(".") if i.isdigit()] return len(octets) == 4 and all(0 <= int(octet) <= 254 for octet in octets) if __name__ == "__main__": ip = input().strip() valid_or_invalid = "valid" if is_ip_v4_address_valid(ip) else "invalid" print(f"{ip} is a {valid_or_invalid} IP v4 address.")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import unittest from knapsack import greedy_knapsack as kp class TestClass(unittest.TestCase): """ Test cases for knapsack """ def test_sorted(self): """ kp.calc_profit takes the required argument (profit, weight, max_weight) and returns whether the answer matches to the expected ones """ profit = [10, 20, 30, 40, 50, 60] weight = [2, 4, 6, 8, 10, 12] max_weight = 100 self.assertEqual(kp.calc_profit(profit, weight, max_weight), 210) def test_negative_max_weight(self): """ Returns ValueError for any negative max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = -15 self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_negative_profit_value(self): """ Returns ValueError for any negative profit value in the list :return: ValueError """ # profit = [10, -20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Weight can not be negative.") def test_negative_weight_value(self): """ Returns ValueError for any negative weight value in the list :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, -4, 6, -8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Profit can not be negative.") def test_null_max_weight(self): """ Returns ValueError for any zero max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = null self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_unequal_list_length(self): """ Returns IndexError if length of lists (profit and weight) are unequal. :return: IndexError """ # profit = [10, 20, 30, 40, 50] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 100 self.assertRaisesRegex( IndexError, "The length of profit and weight must be same." ) if __name__ == "__main__": unittest.main()
import unittest from knapsack import greedy_knapsack as kp class TestClass(unittest.TestCase): """ Test cases for knapsack """ def test_sorted(self): """ kp.calc_profit takes the required argument (profit, weight, max_weight) and returns whether the answer matches to the expected ones """ profit = [10, 20, 30, 40, 50, 60] weight = [2, 4, 6, 8, 10, 12] max_weight = 100 self.assertEqual(kp.calc_profit(profit, weight, max_weight), 210) def test_negative_max_weight(self): """ Returns ValueError for any negative max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = -15 self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_negative_profit_value(self): """ Returns ValueError for any negative profit value in the list :return: ValueError """ # profit = [10, -20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Weight can not be negative.") def test_negative_weight_value(self): """ Returns ValueError for any negative weight value in the list :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, -4, 6, -8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Profit can not be negative.") def test_null_max_weight(self): """ Returns ValueError for any zero max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = null self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_unequal_list_length(self): """ Returns IndexError if length of lists (profit and weight) are unequal. :return: IndexError """ # profit = [10, 20, 30, 40, 50] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 100 self.assertRaisesRegex( IndexError, "The length of profit and weight must be same." ) if __name__ == "__main__": unittest.main()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from typing import Callable def bisection(function: Callable[[float], float], a: float, b: float) -> float: """ finds where function becomes 0 in [a,b] using bolzano >>> bisection(lambda x: x ** 3 - 1, -5, 5) 1.0000000149011612 >>> bisection(lambda x: x ** 3 - 1, 2, 1000) Traceback (most recent call last): ... ValueError: could not find root in given interval. >>> bisection(lambda x: x ** 2 - 4 * x + 3, 0, 2) 1.0 >>> bisection(lambda x: x ** 2 - 4 * x + 3, 2, 4) 3.0 >>> bisection(lambda x: x ** 2 - 4 * x + 3, 4, 1000) Traceback (most recent call last): ... ValueError: could not find root in given interval. """ start: float = a end: float = b if function(a) == 0: # one of the a or b is a root for the function return a elif function(b) == 0: return b elif ( function(a) * function(b) > 0 ): # if none of these are root and they are both positive or negative, # then this algorithm can't find the root raise ValueError("could not find root in given interval.") else: mid: float = start + (end - start) / 2.0 while abs(start - mid) > 10 ** -7: # until precisely equals to 10^-7 if function(mid) == 0: return mid elif function(mid) * function(start) < 0: end = mid else: start = mid mid = start + (end - start) / 2.0 return mid def f(x: float) -> float: return x ** 3 - 2 * x - 5 if __name__ == "__main__": print(bisection(f, 1, 1000)) import doctest doctest.testmod()
from typing import Callable def bisection(function: Callable[[float], float], a: float, b: float) -> float: """ finds where function becomes 0 in [a,b] using bolzano >>> bisection(lambda x: x ** 3 - 1, -5, 5) 1.0000000149011612 >>> bisection(lambda x: x ** 3 - 1, 2, 1000) Traceback (most recent call last): ... ValueError: could not find root in given interval. >>> bisection(lambda x: x ** 2 - 4 * x + 3, 0, 2) 1.0 >>> bisection(lambda x: x ** 2 - 4 * x + 3, 2, 4) 3.0 >>> bisection(lambda x: x ** 2 - 4 * x + 3, 4, 1000) Traceback (most recent call last): ... ValueError: could not find root in given interval. """ start: float = a end: float = b if function(a) == 0: # one of the a or b is a root for the function return a elif function(b) == 0: return b elif ( function(a) * function(b) > 0 ): # if none of these are root and they are both positive or negative, # then this algorithm can't find the root raise ValueError("could not find root in given interval.") else: mid: float = start + (end - start) / 2.0 while abs(start - mid) > 10 ** -7: # until precisely equals to 10^-7 if function(mid) == 0: return mid elif function(mid) * function(start) < 0: end = mid else: start = mid mid = start + (end - start) / 2.0 return mid def f(x: float) -> float: return x ** 3 - 2 * x - 5 if __name__ == "__main__": print(bisection(f, 1, 1000)) import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Project Euler Problem 1: https://projecteuler.net/problem=1 Multiples of 3 and 5 If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. """ def solution(n: int = 1000) -> int: """ Returns the sum of all the multiples of 3 or 5 below n. >>> solution(3) 0 >>> solution(4) 3 >>> solution(10) 23 >>> solution(600) 83700 >>> solution(-7) 0 """ return sum(e for e in range(3, n) if e % 3 == 0 or e % 5 == 0) if __name__ == "__main__": print(f"{solution() = }")
""" Project Euler Problem 1: https://projecteuler.net/problem=1 Multiples of 3 and 5 If we list all the natural numbers below 10 that are multiples of 3 or 5, we get 3, 5, 6 and 9. The sum of these multiples is 23. Find the sum of all the multiples of 3 or 5 below 1000. """ def solution(n: int = 1000) -> int: """ Returns the sum of all the multiples of 3 or 5 below n. >>> solution(3) 0 >>> solution(4) 3 >>> solution(10) 23 >>> solution(600) 83700 >>> solution(-7) 0 """ return sum(e for e in range(3, n) if e % 3 == 0 or e % 5 == 0) if __name__ == "__main__": print(f"{solution() = }")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Project Euler Problem 57: https://projecteuler.net/problem=57 It is possible to show that the square root of two can be expressed as an infinite continued fraction. sqrt(2) = 1 + 1 / (2 + 1 / (2 + 1 / (2 + ...))) By expanding this for the first four iterations, we get: 1 + 1 / 2 = 3 / 2 = 1.5 1 + 1 / (2 + 1 / 2} = 7 / 5 = 1.4 1 + 1 / (2 + 1 / (2 + 1 / 2)) = 17 / 12 = 1.41666... 1 + 1 / (2 + 1 / (2 + 1 / (2 + 1 / 2))) = 41/ 29 = 1.41379... The next three expansions are 99/70, 239/169, and 577/408, but the eighth expansion, 1393/985, is the first example where the number of digits in the numerator exceeds the number of digits in the denominator. In the first one-thousand expansions, how many fractions contain a numerator with more digits than the denominator? """ def solution(n: int = 1000) -> int: """ returns number of fractions containing a numerator with more digits than the denominator in the first n expansions. >>> solution(14) 2 >>> solution(100) 15 >>> solution(10000) 1508 """ prev_numerator, prev_denominator = 1, 1 result = [] for i in range(1, n + 1): numerator = prev_numerator + 2 * prev_denominator denominator = prev_numerator + prev_denominator if len(str(numerator)) > len(str(denominator)): result.append(i) prev_numerator = numerator prev_denominator = denominator return len(result) if __name__ == "__main__": print(f"{solution() = }")
""" Project Euler Problem 57: https://projecteuler.net/problem=57 It is possible to show that the square root of two can be expressed as an infinite continued fraction. sqrt(2) = 1 + 1 / (2 + 1 / (2 + 1 / (2 + ...))) By expanding this for the first four iterations, we get: 1 + 1 / 2 = 3 / 2 = 1.5 1 + 1 / (2 + 1 / 2} = 7 / 5 = 1.4 1 + 1 / (2 + 1 / (2 + 1 / 2)) = 17 / 12 = 1.41666... 1 + 1 / (2 + 1 / (2 + 1 / (2 + 1 / 2))) = 41/ 29 = 1.41379... The next three expansions are 99/70, 239/169, and 577/408, but the eighth expansion, 1393/985, is the first example where the number of digits in the numerator exceeds the number of digits in the denominator. In the first one-thousand expansions, how many fractions contain a numerator with more digits than the denominator? """ def solution(n: int = 1000) -> int: """ returns number of fractions containing a numerator with more digits than the denominator in the first n expansions. >>> solution(14) 2 >>> solution(100) 15 >>> solution(10000) 1508 """ prev_numerator, prev_denominator = 1, 1 result = [] for i in range(1, n + 1): numerator = prev_numerator + 2 * prev_denominator denominator = prev_numerator + prev_denominator if len(str(numerator)) > len(str(denominator)): result.append(i) prev_numerator = numerator prev_denominator = denominator return len(result) if __name__ == "__main__": print(f"{solution() = }")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" https://en.wikipedia.org/wiki/Best-first_search#Greedy_BFS """ from __future__ import annotations Path = list[tuple[int, int]] grid = [ [0, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0, 0], # 0 are free path whereas 1's are obstacles [0, 0, 0, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0], [1, 0, 1, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0], ] delta = ([-1, 0], [0, -1], [1, 0], [0, 1]) # up, left, down, right class Node: """ >>> k = Node(0, 0, 4, 5, 0, None) >>> k.calculate_heuristic() 9 >>> n = Node(1, 4, 3, 4, 2, None) >>> n.calculate_heuristic() 2 >>> l = [k, n] >>> n == l[0] False >>> l.sort() >>> n == l[0] True """ def __init__( self, pos_x: int, pos_y: int, goal_x: int, goal_y: int, g_cost: float, parent: Node | None, ): self.pos_x = pos_x self.pos_y = pos_y self.pos = (pos_y, pos_x) self.goal_x = goal_x self.goal_y = goal_y self.g_cost = g_cost self.parent = parent self.f_cost = self.calculate_heuristic() def calculate_heuristic(self) -> float: """ The heuristic here is the Manhattan Distance Could elaborate to offer more than one choice """ dy = abs(self.pos_x - self.goal_x) dx = abs(self.pos_y - self.goal_y) return dx + dy def __lt__(self, other) -> bool: return self.f_cost < other.f_cost class GreedyBestFirst: """ >>> gbf = GreedyBestFirst((0, 0), (len(grid) - 1, len(grid[0]) - 1)) >>> [x.pos for x in gbf.get_successors(gbf.start)] [(1, 0), (0, 1)] >>> (gbf.start.pos_y + delta[3][0], gbf.start.pos_x + delta[3][1]) (0, 1) >>> (gbf.start.pos_y + delta[2][0], gbf.start.pos_x + delta[2][1]) (1, 0) >>> gbf.retrace_path(gbf.start) [(0, 0)] >>> gbf.search() # doctest: +NORMALIZE_WHITESPACE [(0, 0), (1, 0), (2, 0), (3, 0), (3, 1), (4, 1), (5, 1), (6, 1), (6, 2), (6, 3), (5, 3), (5, 4), (5, 5), (6, 5), (6, 6)] """ def __init__(self, start: tuple[int, int], goal: tuple[int, int]): self.start = Node(start[1], start[0], goal[1], goal[0], 0, None) self.target = Node(goal[1], goal[0], goal[1], goal[0], 99999, None) self.open_nodes = [self.start] self.closed_nodes: list[Node] = [] self.reached = False def search(self) -> Path | None: """ Search for the path, if a path is not found, only the starting position is returned """ while self.open_nodes: # Open Nodes are sorted using __lt__ self.open_nodes.sort() current_node = self.open_nodes.pop(0) if current_node.pos == self.target.pos: self.reached = True return self.retrace_path(current_node) self.closed_nodes.append(current_node) successors = self.get_successors(current_node) for child_node in successors: if child_node in self.closed_nodes: continue if child_node not in self.open_nodes: self.open_nodes.append(child_node) else: # retrieve the best current path better_node = self.open_nodes.pop(self.open_nodes.index(child_node)) if child_node.g_cost < better_node.g_cost: self.open_nodes.append(child_node) else: self.open_nodes.append(better_node) if not self.reached: return [self.start.pos] return None def get_successors(self, parent: Node) -> list[Node]: """ Returns a list of successors (both in the grid and free spaces) """ successors = [] for action in delta: pos_x = parent.pos_x + action[1] pos_y = parent.pos_y + action[0] if not (0 <= pos_x <= len(grid[0]) - 1 and 0 <= pos_y <= len(grid) - 1): continue if grid[pos_y][pos_x] != 0: continue successors.append( Node( pos_x, pos_y, self.target.pos_y, self.target.pos_x, parent.g_cost + 1, parent, ) ) return successors def retrace_path(self, node: Node | None) -> Path: """ Retrace the path from parents to parents until start node """ current_node = node path = [] while current_node is not None: path.append((current_node.pos_y, current_node.pos_x)) current_node = current_node.parent path.reverse() return path if __name__ == "__main__": init = (0, 0) goal = (len(grid) - 1, len(grid[0]) - 1) for elem in grid: print(elem) print("------") greedy_bf = GreedyBestFirst(init, goal) path = greedy_bf.search() if path: for pos_x, pos_y in path: grid[pos_x][pos_y] = 2 for elem in grid: print(elem)
""" https://en.wikipedia.org/wiki/Best-first_search#Greedy_BFS """ from __future__ import annotations Path = list[tuple[int, int]] grid = [ [0, 0, 0, 0, 0, 0, 0], [0, 1, 0, 0, 0, 0, 0], # 0 are free path whereas 1's are obstacles [0, 0, 0, 0, 0, 0, 0], [0, 0, 1, 0, 0, 0, 0], [1, 0, 1, 0, 0, 0, 0], [0, 0, 0, 0, 0, 0, 0], [0, 0, 0, 0, 1, 0, 0], ] delta = ([-1, 0], [0, -1], [1, 0], [0, 1]) # up, left, down, right class Node: """ >>> k = Node(0, 0, 4, 5, 0, None) >>> k.calculate_heuristic() 9 >>> n = Node(1, 4, 3, 4, 2, None) >>> n.calculate_heuristic() 2 >>> l = [k, n] >>> n == l[0] False >>> l.sort() >>> n == l[0] True """ def __init__( self, pos_x: int, pos_y: int, goal_x: int, goal_y: int, g_cost: float, parent: Node | None, ): self.pos_x = pos_x self.pos_y = pos_y self.pos = (pos_y, pos_x) self.goal_x = goal_x self.goal_y = goal_y self.g_cost = g_cost self.parent = parent self.f_cost = self.calculate_heuristic() def calculate_heuristic(self) -> float: """ The heuristic here is the Manhattan Distance Could elaborate to offer more than one choice """ dy = abs(self.pos_x - self.goal_x) dx = abs(self.pos_y - self.goal_y) return dx + dy def __lt__(self, other) -> bool: return self.f_cost < other.f_cost class GreedyBestFirst: """ >>> gbf = GreedyBestFirst((0, 0), (len(grid) - 1, len(grid[0]) - 1)) >>> [x.pos for x in gbf.get_successors(gbf.start)] [(1, 0), (0, 1)] >>> (gbf.start.pos_y + delta[3][0], gbf.start.pos_x + delta[3][1]) (0, 1) >>> (gbf.start.pos_y + delta[2][0], gbf.start.pos_x + delta[2][1]) (1, 0) >>> gbf.retrace_path(gbf.start) [(0, 0)] >>> gbf.search() # doctest: +NORMALIZE_WHITESPACE [(0, 0), (1, 0), (2, 0), (3, 0), (3, 1), (4, 1), (5, 1), (6, 1), (6, 2), (6, 3), (5, 3), (5, 4), (5, 5), (6, 5), (6, 6)] """ def __init__(self, start: tuple[int, int], goal: tuple[int, int]): self.start = Node(start[1], start[0], goal[1], goal[0], 0, None) self.target = Node(goal[1], goal[0], goal[1], goal[0], 99999, None) self.open_nodes = [self.start] self.closed_nodes: list[Node] = [] self.reached = False def search(self) -> Path | None: """ Search for the path, if a path is not found, only the starting position is returned """ while self.open_nodes: # Open Nodes are sorted using __lt__ self.open_nodes.sort() current_node = self.open_nodes.pop(0) if current_node.pos == self.target.pos: self.reached = True return self.retrace_path(current_node) self.closed_nodes.append(current_node) successors = self.get_successors(current_node) for child_node in successors: if child_node in self.closed_nodes: continue if child_node not in self.open_nodes: self.open_nodes.append(child_node) else: # retrieve the best current path better_node = self.open_nodes.pop(self.open_nodes.index(child_node)) if child_node.g_cost < better_node.g_cost: self.open_nodes.append(child_node) else: self.open_nodes.append(better_node) if not self.reached: return [self.start.pos] return None def get_successors(self, parent: Node) -> list[Node]: """ Returns a list of successors (both in the grid and free spaces) """ successors = [] for action in delta: pos_x = parent.pos_x + action[1] pos_y = parent.pos_y + action[0] if not (0 <= pos_x <= len(grid[0]) - 1 and 0 <= pos_y <= len(grid) - 1): continue if grid[pos_y][pos_x] != 0: continue successors.append( Node( pos_x, pos_y, self.target.pos_y, self.target.pos_x, parent.g_cost + 1, parent, ) ) return successors def retrace_path(self, node: Node | None) -> Path: """ Retrace the path from parents to parents until start node """ current_node = node path = [] while current_node is not None: path.append((current_node.pos_y, current_node.pos_x)) current_node = current_node.parent path.reverse() return path if __name__ == "__main__": init = (0, 0) goal = (len(grid) - 1, len(grid[0]) - 1) for elem in grid: print(elem) print("------") greedy_bf = GreedyBestFirst(init, goal) path = greedy_bf.search() if path: for pos_x, pos_y in path: grid[pos_x][pos_y] = 2 for elem in grid: print(elem)
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" 2D Transformations are regularly used in Linear Algebra. I have added the codes for reflection, projection, scaling and rotation 2D matrices. scaling(5) = [[5.0, 0.0], [0.0, 5.0]] rotation(45) = [[0.5253219888177297, -0.8509035245341184], [0.8509035245341184, 0.5253219888177297]] projection(45) = [[0.27596319193541496, 0.446998331800279], [0.446998331800279, 0.7240368080645851]] reflection(45) = [[0.05064397763545947, 0.893996663600558], [0.893996663600558, 0.7018070490682369]] """ from math import cos, sin def scaling(scaling_factor: float) -> list[list[float]]: """ >>> scaling(5) [[5.0, 0.0], [0.0, 5.0]] """ scaling_factor = float(scaling_factor) return [[scaling_factor * int(x == y) for x in range(2)] for y in range(2)] def rotation(angle: float) -> list[list[float]]: """ >>> rotation(45) # doctest: +NORMALIZE_WHITESPACE [[0.5253219888177297, -0.8509035245341184], [0.8509035245341184, 0.5253219888177297]] """ c, s = cos(angle), sin(angle) return [[c, -s], [s, c]] def projection(angle: float) -> list[list[float]]: """ >>> projection(45) # doctest: +NORMALIZE_WHITESPACE [[0.27596319193541496, 0.446998331800279], [0.446998331800279, 0.7240368080645851]] """ c, s = cos(angle), sin(angle) cs = c * s return [[c * c, cs], [cs, s * s]] def reflection(angle: float) -> list[list[float]]: """ >>> reflection(45) # doctest: +NORMALIZE_WHITESPACE [[0.05064397763545947, 0.893996663600558], [0.893996663600558, 0.7018070490682369]] """ c, s = cos(angle), sin(angle) cs = c * s return [[2 * c - 1, 2 * cs], [2 * cs, 2 * s - 1]] print(f" {scaling(5) = }") print(f" {rotation(45) = }") print(f"{projection(45) = }") print(f"{reflection(45) = }")
""" 2D Transformations are regularly used in Linear Algebra. I have added the codes for reflection, projection, scaling and rotation 2D matrices. scaling(5) = [[5.0, 0.0], [0.0, 5.0]] rotation(45) = [[0.5253219888177297, -0.8509035245341184], [0.8509035245341184, 0.5253219888177297]] projection(45) = [[0.27596319193541496, 0.446998331800279], [0.446998331800279, 0.7240368080645851]] reflection(45) = [[0.05064397763545947, 0.893996663600558], [0.893996663600558, 0.7018070490682369]] """ from math import cos, sin def scaling(scaling_factor: float) -> list[list[float]]: """ >>> scaling(5) [[5.0, 0.0], [0.0, 5.0]] """ scaling_factor = float(scaling_factor) return [[scaling_factor * int(x == y) for x in range(2)] for y in range(2)] def rotation(angle: float) -> list[list[float]]: """ >>> rotation(45) # doctest: +NORMALIZE_WHITESPACE [[0.5253219888177297, -0.8509035245341184], [0.8509035245341184, 0.5253219888177297]] """ c, s = cos(angle), sin(angle) return [[c, -s], [s, c]] def projection(angle: float) -> list[list[float]]: """ >>> projection(45) # doctest: +NORMALIZE_WHITESPACE [[0.27596319193541496, 0.446998331800279], [0.446998331800279, 0.7240368080645851]] """ c, s = cos(angle), sin(angle) cs = c * s return [[c * c, cs], [cs, s * s]] def reflection(angle: float) -> list[list[float]]: """ >>> reflection(45) # doctest: +NORMALIZE_WHITESPACE [[0.05064397763545947, 0.893996663600558], [0.893996663600558, 0.7018070490682369]] """ c, s = cos(angle), sin(angle) cs = c * s return [[2 * c - 1, 2 * cs], [2 * cs, 2 * s - 1]] print(f" {scaling(5) = }") print(f" {rotation(45) = }") print(f"{projection(45) = }") print(f"{reflection(45) = }")
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" A Python implementation of the quick select algorithm, which is efficient for calculating the value that would appear in the index of a list if it would be sorted, even if it is not already sorted https://en.wikipedia.org/wiki/Quickselect """ import random def _partition(data: list, pivot) -> tuple: """ Three way partition the data into smaller, equal and greater lists, in relationship to the pivot :param data: The data to be sorted (a list) :param pivot: The value to partition the data on :return: Three list: smaller, equal and greater """ less, equal, greater = [], [], [] for element in data: if element < pivot: less.append(element) elif element > pivot: greater.append(element) else: equal.append(element) return less, equal, greater def quick_select(items: list, index: int): """ >>> quick_select([2, 4, 5, 7, 899, 54, 32], 5) 54 >>> quick_select([2, 4, 5, 7, 899, 54, 32], 1) 4 >>> quick_select([5, 4, 3, 2], 2) 4 >>> quick_select([3, 5, 7, 10, 2, 12], 3) 7 """ # index = len(items) // 2 when trying to find the median # (value of index when items is sorted) # invalid input if index >= len(items) or index < 0: return None pivot = items[random.randint(0, len(items) - 1)] count = 0 smaller, equal, larger = _partition(items, pivot) count = len(equal) m = len(smaller) # index is the pivot if m <= index < m + count: return pivot # must be in smaller elif m > index: return quick_select(smaller, index) # must be in larger else: return quick_select(larger, index - (m + count))
""" A Python implementation of the quick select algorithm, which is efficient for calculating the value that would appear in the index of a list if it would be sorted, even if it is not already sorted https://en.wikipedia.org/wiki/Quickselect """ import random def _partition(data: list, pivot) -> tuple: """ Three way partition the data into smaller, equal and greater lists, in relationship to the pivot :param data: The data to be sorted (a list) :param pivot: The value to partition the data on :return: Three list: smaller, equal and greater """ less, equal, greater = [], [], [] for element in data: if element < pivot: less.append(element) elif element > pivot: greater.append(element) else: equal.append(element) return less, equal, greater def quick_select(items: list, index: int): """ >>> quick_select([2, 4, 5, 7, 899, 54, 32], 5) 54 >>> quick_select([2, 4, 5, 7, 899, 54, 32], 1) 4 >>> quick_select([5, 4, 3, 2], 2) 4 >>> quick_select([3, 5, 7, 10, 2, 12], 3) 7 """ # index = len(items) // 2 when trying to find the median # (value of index when items is sorted) # invalid input if index >= len(items) or index < 0: return None pivot = items[random.randint(0, len(items) - 1)] count = 0 smaller, equal, larger = _partition(items, pivot) count = len(equal) m = len(smaller) # index is the pivot if m <= index < m + count: return pivot # must be in smaller elif m > index: return quick_select(smaller, index) # must be in larger else: return quick_select(larger, index - (m + count))
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from collections import deque from math import floor from random import random from time import time # the default weight is 1 if not assigned but all the implementation is weighted class DirectedGraph: def __init__(self): self.graph = {} # adding vertices and edges # adding the weight is optional # handles repetition def add_pair(self, u, v, w=1): if self.graph.get(u): if self.graph[u].count([w, v]) == 0: self.graph[u].append([w, v]) else: self.graph[u] = [[w, v]] if not self.graph.get(v): self.graph[v] = [] def all_nodes(self): return list(self.graph) # handles if the input does not exist def remove_pair(self, u, v): if self.graph.get(u): for _ in self.graph[u]: if _[1] == v: self.graph[u].remove(_) # if no destination is meant the default value is -1 def dfs(self, s=-2, d=-1): if s == d: return [] stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: if node[1] == d: visited.append(d) return visited else: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return visited # c is the count of nodes you want and if you leave it or pass -1 to the function # the count will be random from 10 to 10000 def fill_graph_randomly(self, c=-1): if c == -1: c = floor(random() * 10000) + 10 for i in range(c): # every vertex has max 100 edges for _ in range(floor(random() * 102) + 1): n = floor(random() * c) + 1 if n != i: self.add_pair(i, n, 1) def bfs(self, s=-2): d = deque() visited = [] if s == -2: s = list(self.graph)[0] d.append(s) visited.append(s) while d: s = d.popleft() if len(self.graph[s]) != 0: for node in self.graph[s]: if visited.count(node[1]) < 1: d.append(node[1]) visited.append(node[1]) return visited def in_degree(self, u): count = 0 for x in self.graph: for y in self.graph[x]: if y[1] == u: count += 1 return count def out_degree(self, u): return len(self.graph[u]) def topological_sort(self, s=-2): stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s sorted_nodes = [] while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: sorted_nodes.append(stack.pop()) if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return sorted_nodes def cycle_nodes(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack = len(stack) - 1 while True and len_stack >= 0: if stack[len_stack] == node[1]: anticipating_nodes.add(node[1]) break else: anticipating_nodes.add(stack[len_stack]) len_stack -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return list(anticipating_nodes) def has_cycle(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack_minus_one = len(stack) - 1 while True and len_stack_minus_one >= 0: if stack[len_stack_minus_one] == node[1]: anticipating_nodes.add(node[1]) break else: return True # TODO:The following code is unreachable. anticipating_nodes.add(stack[len_stack_minus_one]) len_stack_minus_one -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return False def dfs_time(self, s=-2, e=-1): begin = time() self.dfs(s, e) end = time() return end - begin def bfs_time(self, s=-2): begin = time() self.bfs(s) end = time() return end - begin class Graph: def __init__(self): self.graph = {} # adding vertices and edges # adding the weight is optional # handles repetition def add_pair(self, u, v, w=1): # check if the u exists if self.graph.get(u): # if there already is a edge if self.graph[u].count([w, v]) == 0: self.graph[u].append([w, v]) else: # if u does not exist self.graph[u] = [[w, v]] # add the other way if self.graph.get(v): # if there already is a edge if self.graph[v].count([w, u]) == 0: self.graph[v].append([w, u]) else: # if u does not exist self.graph[v] = [[w, u]] # handles if the input does not exist def remove_pair(self, u, v): if self.graph.get(u): for _ in self.graph[u]: if _[1] == v: self.graph[u].remove(_) # the other way round if self.graph.get(v): for _ in self.graph[v]: if _[1] == u: self.graph[v].remove(_) # if no destination is meant the default value is -1 def dfs(self, s=-2, d=-1): if s == d: return [] stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: if node[1] == d: visited.append(d) return visited else: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return visited # c is the count of nodes you want and if you leave it or pass -1 to the function # the count will be random from 10 to 10000 def fill_graph_randomly(self, c=-1): if c == -1: c = floor(random() * 10000) + 10 for i in range(c): # every vertex has max 100 edges for _ in range(floor(random() * 102) + 1): n = floor(random() * c) + 1 if n != i: self.add_pair(i, n, 1) def bfs(self, s=-2): d = deque() visited = [] if s == -2: s = list(self.graph)[0] d.append(s) visited.append(s) while d: s = d.popleft() if len(self.graph[s]) != 0: for node in self.graph[s]: if visited.count(node[1]) < 1: d.append(node[1]) visited.append(node[1]) return visited def degree(self, u): return len(self.graph[u]) def cycle_nodes(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack = len(stack) - 1 while True and len_stack >= 0: if stack[len_stack] == node[1]: anticipating_nodes.add(node[1]) break else: anticipating_nodes.add(stack[len_stack]) len_stack -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return list(anticipating_nodes) def has_cycle(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack_minus_one = len(stack) - 1 while True and len_stack_minus_one >= 0: if stack[len_stack_minus_one] == node[1]: anticipating_nodes.add(node[1]) break else: return True # TODO: the following code is unreachable # is this meant to be called in the else ? anticipating_nodes.add(stack[len_stack_minus_one]) len_stack_minus_one -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return False def all_nodes(self): return list(self.graph) def dfs_time(self, s=-2, e=-1): begin = time() self.dfs(s, e) end = time() return end - begin def bfs_time(self, s=-2): begin = time() self.bfs(s) end = time() return end - begin
from collections import deque from math import floor from random import random from time import time # the default weight is 1 if not assigned but all the implementation is weighted class DirectedGraph: def __init__(self): self.graph = {} # adding vertices and edges # adding the weight is optional # handles repetition def add_pair(self, u, v, w=1): if self.graph.get(u): if self.graph[u].count([w, v]) == 0: self.graph[u].append([w, v]) else: self.graph[u] = [[w, v]] if not self.graph.get(v): self.graph[v] = [] def all_nodes(self): return list(self.graph) # handles if the input does not exist def remove_pair(self, u, v): if self.graph.get(u): for _ in self.graph[u]: if _[1] == v: self.graph[u].remove(_) # if no destination is meant the default value is -1 def dfs(self, s=-2, d=-1): if s == d: return [] stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: if node[1] == d: visited.append(d) return visited else: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return visited # c is the count of nodes you want and if you leave it or pass -1 to the function # the count will be random from 10 to 10000 def fill_graph_randomly(self, c=-1): if c == -1: c = floor(random() * 10000) + 10 for i in range(c): # every vertex has max 100 edges for _ in range(floor(random() * 102) + 1): n = floor(random() * c) + 1 if n != i: self.add_pair(i, n, 1) def bfs(self, s=-2): d = deque() visited = [] if s == -2: s = list(self.graph)[0] d.append(s) visited.append(s) while d: s = d.popleft() if len(self.graph[s]) != 0: for node in self.graph[s]: if visited.count(node[1]) < 1: d.append(node[1]) visited.append(node[1]) return visited def in_degree(self, u): count = 0 for x in self.graph: for y in self.graph[x]: if y[1] == u: count += 1 return count def out_degree(self, u): return len(self.graph[u]) def topological_sort(self, s=-2): stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s sorted_nodes = [] while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: sorted_nodes.append(stack.pop()) if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return sorted_nodes def cycle_nodes(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack = len(stack) - 1 while True and len_stack >= 0: if stack[len_stack] == node[1]: anticipating_nodes.add(node[1]) break else: anticipating_nodes.add(stack[len_stack]) len_stack -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return list(anticipating_nodes) def has_cycle(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack_minus_one = len(stack) - 1 while True and len_stack_minus_one >= 0: if stack[len_stack_minus_one] == node[1]: anticipating_nodes.add(node[1]) break else: return True # TODO:The following code is unreachable. anticipating_nodes.add(stack[len_stack_minus_one]) len_stack_minus_one -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return False def dfs_time(self, s=-2, e=-1): begin = time() self.dfs(s, e) end = time() return end - begin def bfs_time(self, s=-2): begin = time() self.bfs(s) end = time() return end - begin class Graph: def __init__(self): self.graph = {} # adding vertices and edges # adding the weight is optional # handles repetition def add_pair(self, u, v, w=1): # check if the u exists if self.graph.get(u): # if there already is a edge if self.graph[u].count([w, v]) == 0: self.graph[u].append([w, v]) else: # if u does not exist self.graph[u] = [[w, v]] # add the other way if self.graph.get(v): # if there already is a edge if self.graph[v].count([w, u]) == 0: self.graph[v].append([w, u]) else: # if u does not exist self.graph[v] = [[w, u]] # handles if the input does not exist def remove_pair(self, u, v): if self.graph.get(u): for _ in self.graph[u]: if _[1] == v: self.graph[u].remove(_) # the other way round if self.graph.get(v): for _ in self.graph[v]: if _[1] == u: self.graph[v].remove(_) # if no destination is meant the default value is -1 def dfs(self, s=-2, d=-1): if s == d: return [] stack = [] visited = [] if s == -2: s = list(self.graph)[0] stack.append(s) visited.append(s) ss = s while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if visited.count(node[1]) < 1: if node[1] == d: visited.append(d) return visited else: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() if len(stack) != 0: s = stack[len(stack) - 1] else: s = ss # check if se have reached the starting point if len(stack) == 0: return visited # c is the count of nodes you want and if you leave it or pass -1 to the function # the count will be random from 10 to 10000 def fill_graph_randomly(self, c=-1): if c == -1: c = floor(random() * 10000) + 10 for i in range(c): # every vertex has max 100 edges for _ in range(floor(random() * 102) + 1): n = floor(random() * c) + 1 if n != i: self.add_pair(i, n, 1) def bfs(self, s=-2): d = deque() visited = [] if s == -2: s = list(self.graph)[0] d.append(s) visited.append(s) while d: s = d.popleft() if len(self.graph[s]) != 0: for node in self.graph[s]: if visited.count(node[1]) < 1: d.append(node[1]) visited.append(node[1]) return visited def degree(self, u): return len(self.graph[u]) def cycle_nodes(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack = len(stack) - 1 while True and len_stack >= 0: if stack[len_stack] == node[1]: anticipating_nodes.add(node[1]) break else: anticipating_nodes.add(stack[len_stack]) len_stack -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return list(anticipating_nodes) def has_cycle(self): stack = [] visited = [] s = list(self.graph)[0] stack.append(s) visited.append(s) parent = -2 indirect_parents = [] ss = s on_the_way_back = False anticipating_nodes = set() while True: # check if there is any non isolated nodes if len(self.graph[s]) != 0: ss = s for node in self.graph[s]: if ( visited.count(node[1]) > 0 and node[1] != parent and indirect_parents.count(node[1]) > 0 and not on_the_way_back ): len_stack_minus_one = len(stack) - 1 while True and len_stack_minus_one >= 0: if stack[len_stack_minus_one] == node[1]: anticipating_nodes.add(node[1]) break else: return True # TODO: the following code is unreachable # is this meant to be called in the else ? anticipating_nodes.add(stack[len_stack_minus_one]) len_stack_minus_one -= 1 if visited.count(node[1]) < 1: stack.append(node[1]) visited.append(node[1]) ss = node[1] break # check if all the children are visited if s == ss: stack.pop() on_the_way_back = True if len(stack) != 0: s = stack[len(stack) - 1] else: on_the_way_back = False indirect_parents.append(parent) parent = s s = ss # check if se have reached the starting point if len(stack) == 0: return False def all_nodes(self): return list(self.graph) def dfs_time(self, s=-2, e=-1): begin = time() self.dfs(s, e) end = time() return end - begin def bfs_time(self, s=-2): begin = time() self.bfs(s) end = time() return end - begin
-1
TheAlgorithms/Python
5,814
[Mypy] fix other/least_recently_used
### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
spazm
"2021-11-11T00:34:03Z"
"2021-11-16T14:01:18Z"
9b9405fdcdc5ba9fc16a53f8ae6be081d4f5582a
551c65766d1594ecd7e127ac288ed23b9e89b8c3
[Mypy] fix other/least_recently_used. ### Describe your change: + fix bug in dq_removal code. Needed to pass key to .remove() rather than index. + remove incorrect annotation to make the `__init__` an abstract function. + Annotate all functions and class `Generic[T]` + Expand example to show creating a `LRUCache` over concrete and mixed types. + Adds doctest to LRUCache class + Adds assert test in main. Previously opened as #5656 Closes: #4052 #### Before ``` % git checkout master Your branch is up to date with 'origin/master'. % mypy --ignore-missing-imports --install-types least_recently_used.py least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" Found 1 error in 1 file (checked 1 source file) ``` ``` % mypy --strict least_recently_used.py least_recently_used.py:27: error: Function is missing a type annotation least_recently_used.py:33: error: Unsupported right operand type for in ("object") least_recently_used.py:34: error: Argument 1 to "len" has incompatible type "object"; expected "Sized" least_recently_used.py:35: error: "object" has no attribute "pop" least_recently_used.py:36: error: "object" has no attribute "remove" least_recently_used.py:39: error: Need type annotation for "key" least_recently_used.py:39: error: Argument 1 to "enumerate" has incompatible type "object"; expected "Iterable[<nothing>]" least_recently_used.py:43: error: "object" has no attribute "remove" least_recently_used.py:45: error: "object" has no attribute "appendleft" least_recently_used.py:46: error: "object" has no attribute "add" least_recently_used.py:48: error: Function is missing a return type annotation least_recently_used.py:48: note: Use "-> None" if function does not return a value least_recently_used.py:52: error: "object" has no attribute "__iter__"; maybe "__str__" or "__dir__"? (not iterable) least_recently_used.py:57: error: Cannot instantiate abstract class "LRUCache" with abstract attribute "__init__" least_recently_used.py:58: error: Call to untyped function "refer" in typed context least_recently_used.py:59: error: Call to untyped function "refer" in typed context least_recently_used.py:60: error: Call to untyped function "refer" in typed context least_recently_used.py:61: error: Call to untyped function "refer" in typed context least_recently_used.py:62: error: Call to untyped function "refer" in typed context least_recently_used.py:63: error: Call to untyped function "refer" in typed context least_recently_used.py:64: error: Call to untyped function "display" in typed context Found 20 errors in 1 file (checked 1 source file) ``` #### After ``` % git checkout mypy-fix-other-least_recently_used Switched to branch 'mypy-fix-other-least_recently_used' Your branch is up to date with 'origin/mypy-fix-other-least_recently_used'. % mypy --strict least_recently_used.py Success: no issues found in 1 source file ``` * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [ ] All new Python files are placed inside an existing directory. * [ ] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [ ] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
## Arithmetic Analysis * [Bisection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/bisection.py) * [Gaussian Elimination](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/gaussian_elimination.py) * [In Static Equilibrium](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/in_static_equilibrium.py) * [Intersection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/intersection.py) * [Jacobi Iteration Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/jacobi_iteration_method.py) * [Lu Decomposition](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/lu_decomposition.py) * [Newton Forward Interpolation](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_forward_interpolation.py) * [Newton Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_method.py) * [Newton Raphson](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_raphson.py) * [Secant Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/secant_method.py) ## Audio Filters * [Butterworth Filter](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/butterworth_filter.py) * [Iir Filter](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/iir_filter.py) * [Show Response](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/show_response.py) ## Backtracking * [All Combinations](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_combinations.py) * [All Permutations](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_permutations.py) * [All Subsequences](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_subsequences.py) * [Coloring](https://github.com/TheAlgorithms/Python/blob/master/backtracking/coloring.py) * [Hamiltonian Cycle](https://github.com/TheAlgorithms/Python/blob/master/backtracking/hamiltonian_cycle.py) * [Knight Tour](https://github.com/TheAlgorithms/Python/blob/master/backtracking/knight_tour.py) * [Minimax](https://github.com/TheAlgorithms/Python/blob/master/backtracking/minimax.py) * [N Queens](https://github.com/TheAlgorithms/Python/blob/master/backtracking/n_queens.py) * [N Queens Math](https://github.com/TheAlgorithms/Python/blob/master/backtracking/n_queens_math.py) * [Rat In Maze](https://github.com/TheAlgorithms/Python/blob/master/backtracking/rat_in_maze.py) * [Sudoku](https://github.com/TheAlgorithms/Python/blob/master/backtracking/sudoku.py) * [Sum Of Subsets](https://github.com/TheAlgorithms/Python/blob/master/backtracking/sum_of_subsets.py) ## Bit Manipulation * [Binary And Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_and_operator.py) * [Binary Count Setbits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_count_setbits.py) * [Binary Count Trailing Zeros](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_count_trailing_zeros.py) * [Binary Or Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_or_operator.py) * [Binary Shifts](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_shifts.py) * [Binary Twos Complement](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_twos_complement.py) * [Binary Xor Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_xor_operator.py) * [Count 1S Brian Kernighan Method](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/count_1s_brian_kernighan_method.py) * [Count Number Of One Bits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/count_number_of_one_bits.py) * [Gray Code Sequence](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/gray_code_sequence.py) * [Reverse Bits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/reverse_bits.py) * [Single Bit Manipulation Operations](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/single_bit_manipulation_operations.py) ## Blockchain * [Chinese Remainder Theorem](https://github.com/TheAlgorithms/Python/blob/master/blockchain/chinese_remainder_theorem.py) * [Diophantine Equation](https://github.com/TheAlgorithms/Python/blob/master/blockchain/diophantine_equation.py) * [Modular Division](https://github.com/TheAlgorithms/Python/blob/master/blockchain/modular_division.py) ## Boolean Algebra * [Quine Mc Cluskey](https://github.com/TheAlgorithms/Python/blob/master/boolean_algebra/quine_mc_cluskey.py) ## Cellular Automata * [Conways Game Of Life](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/conways_game_of_life.py) * [Game Of Life](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/game_of_life.py) * [Nagel Schrekenberg](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/nagel_schrekenberg.py) * [One Dimensional](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/one_dimensional.py) ## Ciphers * [A1Z26](https://github.com/TheAlgorithms/Python/blob/master/ciphers/a1z26.py) * [Affine Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/affine_cipher.py) * [Atbash](https://github.com/TheAlgorithms/Python/blob/master/ciphers/atbash.py) * [Baconian Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/baconian_cipher.py) * [Base16](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base16.py) * [Base32](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base32.py) * [Base64](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base64.py) * [Base85](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base85.py) * [Beaufort Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/beaufort_cipher.py) * [Bifid](https://github.com/TheAlgorithms/Python/blob/master/ciphers/bifid.py) * [Brute Force Caesar Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/brute_force_caesar_cipher.py) * [Caesar Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/caesar_cipher.py) * [Cryptomath Module](https://github.com/TheAlgorithms/Python/blob/master/ciphers/cryptomath_module.py) * [Decrypt Caesar With Chi Squared](https://github.com/TheAlgorithms/Python/blob/master/ciphers/decrypt_caesar_with_chi_squared.py) * [Deterministic Miller Rabin](https://github.com/TheAlgorithms/Python/blob/master/ciphers/deterministic_miller_rabin.py) * [Diffie](https://github.com/TheAlgorithms/Python/blob/master/ciphers/diffie.py) * [Diffie Hellman](https://github.com/TheAlgorithms/Python/blob/master/ciphers/diffie_hellman.py) * [Elgamal Key Generator](https://github.com/TheAlgorithms/Python/blob/master/ciphers/elgamal_key_generator.py) * [Enigma Machine2](https://github.com/TheAlgorithms/Python/blob/master/ciphers/enigma_machine2.py) * [Hill Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/hill_cipher.py) * [Mixed Keyword Cypher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/mixed_keyword_cypher.py) * [Mono Alphabetic Ciphers](https://github.com/TheAlgorithms/Python/blob/master/ciphers/mono_alphabetic_ciphers.py) * [Morse Code](https://github.com/TheAlgorithms/Python/blob/master/ciphers/morse_code.py) * [Onepad Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/onepad_cipher.py) * [Playfair Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/playfair_cipher.py) * [Polybius](https://github.com/TheAlgorithms/Python/blob/master/ciphers/polybius.py) * [Porta Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/porta_cipher.py) * [Rabin Miller](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rabin_miller.py) * [Rail Fence Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rail_fence_cipher.py) * [Rot13](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rot13.py) * [Rsa Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_cipher.py) * [Rsa Factorization](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_factorization.py) * [Rsa Key Generator](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_key_generator.py) * [Shuffled Shift Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/shuffled_shift_cipher.py) * [Simple Keyword Cypher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/simple_keyword_cypher.py) * [Simple Substitution Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/simple_substitution_cipher.py) * [Trafid Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/trafid_cipher.py) * [Transposition Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/transposition_cipher.py) * [Transposition Cipher Encrypt Decrypt File](https://github.com/TheAlgorithms/Python/blob/master/ciphers/transposition_cipher_encrypt_decrypt_file.py) * [Vigenere Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/vigenere_cipher.py) * [Xor Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/xor_cipher.py) ## Compression * [Burrows Wheeler](https://github.com/TheAlgorithms/Python/blob/master/compression/burrows_wheeler.py) * [Huffman](https://github.com/TheAlgorithms/Python/blob/master/compression/huffman.py) * [Lempel Ziv](https://github.com/TheAlgorithms/Python/blob/master/compression/lempel_ziv.py) * [Lempel Ziv Decompress](https://github.com/TheAlgorithms/Python/blob/master/compression/lempel_ziv_decompress.py) * [Peak Signal To Noise Ratio](https://github.com/TheAlgorithms/Python/blob/master/compression/peak_signal_to_noise_ratio.py) ## Computer Vision * [Cnn Classification](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/cnn_classification.py) * [Flip Augmentation](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/flip_augmentation.py) * [Harris Corner](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/harris_corner.py) * [Mean Threshold](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/mean_threshold.py) * [Mosaic Augmentation](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/mosaic_augmentation.py) ## Conversions * [Binary To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_decimal.py) * [Binary To Hexadecimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_hexadecimal.py) * [Binary To Octal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_octal.py) * [Decimal To Any](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_any.py) * [Decimal To Binary](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_binary.py) * [Decimal To Binary Recursion](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_binary_recursion.py) * [Decimal To Hexadecimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_hexadecimal.py) * [Decimal To Octal](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_octal.py) * [Hex To Bin](https://github.com/TheAlgorithms/Python/blob/master/conversions/hex_to_bin.py) * [Hexadecimal To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/hexadecimal_to_decimal.py) * [Length Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/length_conversion.py) * [Molecular Chemistry](https://github.com/TheAlgorithms/Python/blob/master/conversions/molecular_chemistry.py) * [Octal To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/octal_to_decimal.py) * [Prefix Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/prefix_conversions.py) * [Pressure Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/pressure_conversions.py) * [Rgb Hsv Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/rgb_hsv_conversion.py) * [Roman Numerals](https://github.com/TheAlgorithms/Python/blob/master/conversions/roman_numerals.py) * [Temperature Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/temperature_conversions.py) * [Volume Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/volume_conversions.py) * [Weight Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/weight_conversion.py) ## Data Structures * Binary Tree * [Avl Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/avl_tree.py) * [Basic Binary Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/basic_binary_tree.py) * [Binary Search Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_search_tree.py) * [Binary Search Tree Recursive](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_search_tree_recursive.py) * [Binary Tree Mirror](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_tree_mirror.py) * [Binary Tree Traversals](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_tree_traversals.py) * [Fenwick Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/fenwick_tree.py) * [Lazy Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/lazy_segment_tree.py) * [Lowest Common Ancestor](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/lowest_common_ancestor.py) * [Merge Two Binary Trees](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/merge_two_binary_trees.py) * [Non Recursive Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/non_recursive_segment_tree.py) * [Number Of Possible Binary Trees](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/number_of_possible_binary_trees.py) * [Red Black Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/red_black_tree.py) * [Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/segment_tree.py) * [Segment Tree Other](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/segment_tree_other.py) * [Treap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/treap.py) * [Wavelet Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/wavelet_tree.py) * Disjoint Set * [Alternate Disjoint Set](https://github.com/TheAlgorithms/Python/blob/master/data_structures/disjoint_set/alternate_disjoint_set.py) * [Disjoint Set](https://github.com/TheAlgorithms/Python/blob/master/data_structures/disjoint_set/disjoint_set.py) * Hashing * [Double Hash](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/double_hash.py) * [Hash Table](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/hash_table.py) * [Hash Table With Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/hash_table_with_linked_list.py) * Number Theory * [Prime Numbers](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/number_theory/prime_numbers.py) * [Quadratic Probing](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/quadratic_probing.py) * Heap * [Binomial Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/binomial_heap.py) * [Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/heap.py) * [Heap Generic](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/heap_generic.py) * [Max Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/max_heap.py) * [Min Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/min_heap.py) * [Randomized Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/randomized_heap.py) * [Skew Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/skew_heap.py) * Linked List * [Circular Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/circular_linked_list.py) * [Deque Doubly](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/deque_doubly.py) * [Doubly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/doubly_linked_list.py) * [Doubly Linked List Two](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/doubly_linked_list_two.py) * [From Sequence](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/from_sequence.py) * [Has Loop](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/has_loop.py) * [Is Palindrome](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/is_palindrome.py) * [Merge Two Lists](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/merge_two_lists.py) * [Middle Element Of Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/middle_element_of_linked_list.py) * [Print Reverse](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/print_reverse.py) * [Singly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/singly_linked_list.py) * [Skip List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/skip_list.py) * [Swap Nodes](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/swap_nodes.py) * Queue * [Circular Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/circular_queue.py) * [Circular Queue Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/circular_queue_linked_list.py) * [Double Ended Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/double_ended_queue.py) * [Linked Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/linked_queue.py) * [Priority Queue Using List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/priority_queue_using_list.py) * [Queue On List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/queue_on_list.py) * [Queue On Pseudo Stack](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/queue_on_pseudo_stack.py) * Stacks * [Balanced Parentheses](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/balanced_parentheses.py) * [Dijkstras Two Stack Algorithm](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/dijkstras_two_stack_algorithm.py) * [Evaluate Postfix Notations](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/evaluate_postfix_notations.py) * [Infix To Postfix Conversion](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/infix_to_postfix_conversion.py) * [Infix To Prefix Conversion](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/infix_to_prefix_conversion.py) * [Next Greater Element](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/next_greater_element.py) * [Postfix Evaluation](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/postfix_evaluation.py) * [Prefix Evaluation](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/prefix_evaluation.py) * [Stack](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack.py) * [Stack With Doubly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack_with_doubly_linked_list.py) * [Stack With Singly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack_with_singly_linked_list.py) * [Stock Span Problem](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stock_span_problem.py) * Trie * [Trie](https://github.com/TheAlgorithms/Python/blob/master/data_structures/trie/trie.py) ## Digital Image Processing * [Change Brightness](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/change_brightness.py) * [Change Contrast](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/change_contrast.py) * [Convert To Negative](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/convert_to_negative.py) * Dithering * [Burkes](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/dithering/burkes.py) * Edge Detection * [Canny](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/edge_detection/canny.py) * Filters * [Bilateral Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/bilateral_filter.py) * [Convolve](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/convolve.py) * [Gabor Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/gabor_filter.py) * [Gaussian Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/gaussian_filter.py) * [Median Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/median_filter.py) * [Sobel Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/sobel_filter.py) * Histogram Equalization * [Histogram Stretch](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/histogram_equalization/histogram_stretch.py) * [Index Calculation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/index_calculation.py) * Morphological Operations * [Dilation Operation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/morphological_operations/dilation_operation.py) * [Erosion Operation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/morphological_operations/erosion_operation.py) * Resize * [Resize](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/resize/resize.py) * Rotation * [Rotation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/rotation/rotation.py) * [Sepia](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/sepia.py) * [Test Digital Image Processing](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/test_digital_image_processing.py) ## Divide And Conquer * [Closest Pair Of Points](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/closest_pair_of_points.py) * [Convex Hull](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/convex_hull.py) * [Heaps Algorithm](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/heaps_algorithm.py) * [Heaps Algorithm Iterative](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/heaps_algorithm_iterative.py) * [Inversions](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/inversions.py) * [Kth Order Statistic](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/kth_order_statistic.py) * [Max Difference Pair](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/max_difference_pair.py) * [Max Subarray Sum](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/max_subarray_sum.py) * [Mergesort](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/mergesort.py) * [Peak](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/peak.py) * [Power](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/power.py) * [Strassen Matrix Multiplication](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/strassen_matrix_multiplication.py) ## Dynamic Programming * [Abbreviation](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/abbreviation.py) * [All Construct](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/all_construct.py) * [Bitmask](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/bitmask.py) * [Catalan Numbers](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/catalan_numbers.py) * [Climbing Stairs](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/climbing_stairs.py) * [Edit Distance](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/edit_distance.py) * [Factorial](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/factorial.py) * [Fast Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fast_fibonacci.py) * [Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fibonacci.py) * [Floyd Warshall](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/floyd_warshall.py) * [Fractional Knapsack](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fractional_knapsack.py) * [Fractional Knapsack 2](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fractional_knapsack_2.py) * [Integer Partition](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/integer_partition.py) * [Iterating Through Submasks](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/iterating_through_submasks.py) * [Knapsack](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/knapsack.py) * [Longest Common Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_common_subsequence.py) * [Longest Increasing Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_increasing_subsequence.py) * [Longest Increasing Subsequence O(Nlogn)](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_increasing_subsequence_o(nlogn).py) * [Longest Sub Array](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_sub_array.py) * [Matrix Chain Order](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/matrix_chain_order.py) * [Max Non Adjacent Sum](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_non_adjacent_sum.py) * [Max Sub Array](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_sub_array.py) * [Max Sum Contiguous Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_sum_contiguous_subsequence.py) * [Minimum Coin Change](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_coin_change.py) * [Minimum Cost Path](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_cost_path.py) * [Minimum Partition](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_partition.py) * [Minimum Steps To One](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_steps_to_one.py) * [Optimal Binary Search Tree](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/optimal_binary_search_tree.py) * [Rod Cutting](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/rod_cutting.py) * [Subset Generation](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/subset_generation.py) * [Sum Of Subset](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/sum_of_subset.py) ## Electronics * [Carrier Concentration](https://github.com/TheAlgorithms/Python/blob/master/electronics/carrier_concentration.py) * [Coulombs Law](https://github.com/TheAlgorithms/Python/blob/master/electronics/coulombs_law.py) * [Electric Power](https://github.com/TheAlgorithms/Python/blob/master/electronics/electric_power.py) * [Ohms Law](https://github.com/TheAlgorithms/Python/blob/master/electronics/ohms_law.py) ## File Transfer * [Receive File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/receive_file.py) * [Send File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/send_file.py) * Tests * [Test Send File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/tests/test_send_file.py) ## Financial * [Equated Monthly Installments](https://github.com/TheAlgorithms/Python/blob/master/financial/equated_monthly_installments.py) * [Interest](https://github.com/TheAlgorithms/Python/blob/master/financial/interest.py) ## Fractals * [Julia Sets](https://github.com/TheAlgorithms/Python/blob/master/fractals/julia_sets.py) * [Koch Snowflake](https://github.com/TheAlgorithms/Python/blob/master/fractals/koch_snowflake.py) * [Mandelbrot](https://github.com/TheAlgorithms/Python/blob/master/fractals/mandelbrot.py) * [Sierpinski Triangle](https://github.com/TheAlgorithms/Python/blob/master/fractals/sierpinski_triangle.py) ## Fuzzy Logic * [Fuzzy Operations](https://github.com/TheAlgorithms/Python/blob/master/fuzzy_logic/fuzzy_operations.py) ## Genetic Algorithm * [Basic String](https://github.com/TheAlgorithms/Python/blob/master/genetic_algorithm/basic_string.py) ## Geodesy * [Haversine Distance](https://github.com/TheAlgorithms/Python/blob/master/geodesy/haversine_distance.py) * [Lamberts Ellipsoidal Distance](https://github.com/TheAlgorithms/Python/blob/master/geodesy/lamberts_ellipsoidal_distance.py) ## Graphics * [Bezier Curve](https://github.com/TheAlgorithms/Python/blob/master/graphics/bezier_curve.py) * [Vector3 For 2D Rendering](https://github.com/TheAlgorithms/Python/blob/master/graphics/vector3_for_2d_rendering.py) ## Graphs * [A Star](https://github.com/TheAlgorithms/Python/blob/master/graphs/a_star.py) * [Articulation Points](https://github.com/TheAlgorithms/Python/blob/master/graphs/articulation_points.py) * [Basic Graphs](https://github.com/TheAlgorithms/Python/blob/master/graphs/basic_graphs.py) * [Bellman Ford](https://github.com/TheAlgorithms/Python/blob/master/graphs/bellman_ford.py) * [Bfs Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/bfs_shortest_path.py) * [Bfs Zero One Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/bfs_zero_one_shortest_path.py) * [Bidirectional A Star](https://github.com/TheAlgorithms/Python/blob/master/graphs/bidirectional_a_star.py) * [Bidirectional Breadth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/bidirectional_breadth_first_search.py) * [Boruvka](https://github.com/TheAlgorithms/Python/blob/master/graphs/boruvka.py) * [Breadth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search.py) * [Breadth First Search 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search_2.py) * [Breadth First Search Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search_shortest_path.py) * [Check Bipartite Graph Bfs](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_bipartite_graph_bfs.py) * [Check Bipartite Graph Dfs](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_bipartite_graph_dfs.py) * [Check Cycle](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_cycle.py) * [Connected Components](https://github.com/TheAlgorithms/Python/blob/master/graphs/connected_components.py) * [Depth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/depth_first_search.py) * [Depth First Search 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/depth_first_search_2.py) * [Dijkstra](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra.py) * [Dijkstra 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra_2.py) * [Dijkstra Algorithm](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra_algorithm.py) * [Dinic](https://github.com/TheAlgorithms/Python/blob/master/graphs/dinic.py) * [Directed And Undirected (Weighted) Graph](https://github.com/TheAlgorithms/Python/blob/master/graphs/directed_and_undirected_(weighted)_graph.py) * [Edmonds Karp Multiple Source And Sink](https://github.com/TheAlgorithms/Python/blob/master/graphs/edmonds_karp_multiple_source_and_sink.py) * [Eulerian Path And Circuit For Undirected Graph](https://github.com/TheAlgorithms/Python/blob/master/graphs/eulerian_path_and_circuit_for_undirected_graph.py) * [Even Tree](https://github.com/TheAlgorithms/Python/blob/master/graphs/even_tree.py) * [Finding Bridges](https://github.com/TheAlgorithms/Python/blob/master/graphs/finding_bridges.py) * [Frequent Pattern Graph Miner](https://github.com/TheAlgorithms/Python/blob/master/graphs/frequent_pattern_graph_miner.py) * [G Topological Sort](https://github.com/TheAlgorithms/Python/blob/master/graphs/g_topological_sort.py) * [Gale Shapley Bigraph](https://github.com/TheAlgorithms/Python/blob/master/graphs/gale_shapley_bigraph.py) * [Graph List](https://github.com/TheAlgorithms/Python/blob/master/graphs/graph_list.py) * [Graph Matrix](https://github.com/TheAlgorithms/Python/blob/master/graphs/graph_matrix.py) * [Graphs Floyd Warshall](https://github.com/TheAlgorithms/Python/blob/master/graphs/graphs_floyd_warshall.py) * [Greedy Best First](https://github.com/TheAlgorithms/Python/blob/master/graphs/greedy_best_first.py) * [Greedy Min Vertex Cover](https://github.com/TheAlgorithms/Python/blob/master/graphs/greedy_min_vertex_cover.py) * [Kahns Algorithm Long](https://github.com/TheAlgorithms/Python/blob/master/graphs/kahns_algorithm_long.py) * [Kahns Algorithm Topo](https://github.com/TheAlgorithms/Python/blob/master/graphs/kahns_algorithm_topo.py) * [Karger](https://github.com/TheAlgorithms/Python/blob/master/graphs/karger.py) * [Markov Chain](https://github.com/TheAlgorithms/Python/blob/master/graphs/markov_chain.py) * [Matching Min Vertex Cover](https://github.com/TheAlgorithms/Python/blob/master/graphs/matching_min_vertex_cover.py) * [Minimum Spanning Tree Boruvka](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_boruvka.py) * [Minimum Spanning Tree Kruskal](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_kruskal.py) * [Minimum Spanning Tree Kruskal2](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_kruskal2.py) * [Minimum Spanning Tree Prims](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_prims.py) * [Minimum Spanning Tree Prims2](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_prims2.py) * [Multi Heuristic Astar](https://github.com/TheAlgorithms/Python/blob/master/graphs/multi_heuristic_astar.py) * [Page Rank](https://github.com/TheAlgorithms/Python/blob/master/graphs/page_rank.py) * [Prim](https://github.com/TheAlgorithms/Python/blob/master/graphs/prim.py) * [Random Graph Generator](https://github.com/TheAlgorithms/Python/blob/master/graphs/random_graph_generator.py) * [Scc Kosaraju](https://github.com/TheAlgorithms/Python/blob/master/graphs/scc_kosaraju.py) * [Strongly Connected Components](https://github.com/TheAlgorithms/Python/blob/master/graphs/strongly_connected_components.py) * [Tarjans Scc](https://github.com/TheAlgorithms/Python/blob/master/graphs/tarjans_scc.py) * Tests * [Test Min Spanning Tree Kruskal](https://github.com/TheAlgorithms/Python/blob/master/graphs/tests/test_min_spanning_tree_kruskal.py) * [Test Min Spanning Tree Prim](https://github.com/TheAlgorithms/Python/blob/master/graphs/tests/test_min_spanning_tree_prim.py) ## Greedy Methods * [Optimal Merge Pattern](https://github.com/TheAlgorithms/Python/blob/master/greedy_methods/optimal_merge_pattern.py) ## Hashes * [Adler32](https://github.com/TheAlgorithms/Python/blob/master/hashes/adler32.py) * [Chaos Machine](https://github.com/TheAlgorithms/Python/blob/master/hashes/chaos_machine.py) * [Djb2](https://github.com/TheAlgorithms/Python/blob/master/hashes/djb2.py) * [Enigma Machine](https://github.com/TheAlgorithms/Python/blob/master/hashes/enigma_machine.py) * [Hamming Code](https://github.com/TheAlgorithms/Python/blob/master/hashes/hamming_code.py) * [Luhn](https://github.com/TheAlgorithms/Python/blob/master/hashes/luhn.py) * [Md5](https://github.com/TheAlgorithms/Python/blob/master/hashes/md5.py) * [Sdbm](https://github.com/TheAlgorithms/Python/blob/master/hashes/sdbm.py) * [Sha1](https://github.com/TheAlgorithms/Python/blob/master/hashes/sha1.py) * [Sha256](https://github.com/TheAlgorithms/Python/blob/master/hashes/sha256.py) ## Knapsack * [Greedy Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/greedy_knapsack.py) * [Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/knapsack.py) * Tests * [Test Greedy Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/tests/test_greedy_knapsack.py) * [Test Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/tests/test_knapsack.py) ## Linear Algebra * Src * [Conjugate Gradient](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/conjugate_gradient.py) * [Lib](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/lib.py) * [Polynom For Points](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/polynom_for_points.py) * [Power Iteration](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/power_iteration.py) * [Rayleigh Quotient](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/rayleigh_quotient.py) * [Schur Complement](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/schur_complement.py) * [Test Linear Algebra](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/test_linear_algebra.py) * [Transformations 2D](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/transformations_2d.py) ## Machine Learning * [Astar](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/astar.py) * [Data Transformations](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/data_transformations.py) * [Decision Tree](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/decision_tree.py) * Forecasting * [Run](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/forecasting/run.py) * [Gaussian Naive Bayes](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gaussian_naive_bayes.py) * [Gradient Boosting Regressor](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gradient_boosting_regressor.py) * [Gradient Descent](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gradient_descent.py) * [K Means Clust](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/k_means_clust.py) * [K Nearest Neighbours](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/k_nearest_neighbours.py) * [Knn Sklearn](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/knn_sklearn.py) * [Linear Discriminant Analysis](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_discriminant_analysis.py) * [Linear Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_regression.py) * Local Weighted Learning * [Local Weighted Learning](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/local_weighted_learning/local_weighted_learning.py) * [Logistic Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/logistic_regression.py) * Lstm * [Lstm Prediction](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/lstm/lstm_prediction.py) * [Multilayer Perceptron Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/multilayer_perceptron_classifier.py) * [Polymonial Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/polymonial_regression.py) * [Random Forest Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/random_forest_classifier.py) * [Random Forest Regressor](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/random_forest_regressor.py) * [Scoring Functions](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/scoring_functions.py) * [Sequential Minimum Optimization](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/sequential_minimum_optimization.py) * [Similarity Search](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/similarity_search.py) * [Support Vector Machines](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/support_vector_machines.py) * [Word Frequency Functions](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/word_frequency_functions.py) ## Maths * [3N Plus 1](https://github.com/TheAlgorithms/Python/blob/master/maths/3n_plus_1.py) * [Abs](https://github.com/TheAlgorithms/Python/blob/master/maths/abs.py) * [Abs Max](https://github.com/TheAlgorithms/Python/blob/master/maths/abs_max.py) * [Abs Min](https://github.com/TheAlgorithms/Python/blob/master/maths/abs_min.py) * [Add](https://github.com/TheAlgorithms/Python/blob/master/maths/add.py) * [Aliquot Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/aliquot_sum.py) * [Allocation Number](https://github.com/TheAlgorithms/Python/blob/master/maths/allocation_number.py) * [Area](https://github.com/TheAlgorithms/Python/blob/master/maths/area.py) * [Area Under Curve](https://github.com/TheAlgorithms/Python/blob/master/maths/area_under_curve.py) * [Armstrong Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/armstrong_numbers.py) * [Average Mean](https://github.com/TheAlgorithms/Python/blob/master/maths/average_mean.py) * [Average Median](https://github.com/TheAlgorithms/Python/blob/master/maths/average_median.py) * [Average Mode](https://github.com/TheAlgorithms/Python/blob/master/maths/average_mode.py) * [Bailey Borwein Plouffe](https://github.com/TheAlgorithms/Python/blob/master/maths/bailey_borwein_plouffe.py) * [Basic Maths](https://github.com/TheAlgorithms/Python/blob/master/maths/basic_maths.py) * [Binary Exp Mod](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exp_mod.py) * [Binary Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation.py) * [Binary Exponentiation 2](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation_2.py) * [Binary Exponentiation 3](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation_3.py) * [Binomial Coefficient](https://github.com/TheAlgorithms/Python/blob/master/maths/binomial_coefficient.py) * [Binomial Distribution](https://github.com/TheAlgorithms/Python/blob/master/maths/binomial_distribution.py) * [Bisection](https://github.com/TheAlgorithms/Python/blob/master/maths/bisection.py) * [Ceil](https://github.com/TheAlgorithms/Python/blob/master/maths/ceil.py) * [Check Polygon](https://github.com/TheAlgorithms/Python/blob/master/maths/check_polygon.py) * [Chudnovsky Algorithm](https://github.com/TheAlgorithms/Python/blob/master/maths/chudnovsky_algorithm.py) * [Collatz Sequence](https://github.com/TheAlgorithms/Python/blob/master/maths/collatz_sequence.py) * [Combinations](https://github.com/TheAlgorithms/Python/blob/master/maths/combinations.py) * [Decimal Isolate](https://github.com/TheAlgorithms/Python/blob/master/maths/decimal_isolate.py) * [Double Factorial Iterative](https://github.com/TheAlgorithms/Python/blob/master/maths/double_factorial_iterative.py) * [Double Factorial Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/double_factorial_recursive.py) * [Entropy](https://github.com/TheAlgorithms/Python/blob/master/maths/entropy.py) * [Euclidean Distance](https://github.com/TheAlgorithms/Python/blob/master/maths/euclidean_distance.py) * [Euclidean Gcd](https://github.com/TheAlgorithms/Python/blob/master/maths/euclidean_gcd.py) * [Euler Method](https://github.com/TheAlgorithms/Python/blob/master/maths/euler_method.py) * [Euler Modified](https://github.com/TheAlgorithms/Python/blob/master/maths/euler_modified.py) * [Eulers Totient](https://github.com/TheAlgorithms/Python/blob/master/maths/eulers_totient.py) * [Extended Euclidean Algorithm](https://github.com/TheAlgorithms/Python/blob/master/maths/extended_euclidean_algorithm.py) * [Factorial Iterative](https://github.com/TheAlgorithms/Python/blob/master/maths/factorial_iterative.py) * [Factorial Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/factorial_recursive.py) * [Factors](https://github.com/TheAlgorithms/Python/blob/master/maths/factors.py) * [Fermat Little Theorem](https://github.com/TheAlgorithms/Python/blob/master/maths/fermat_little_theorem.py) * [Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/maths/fibonacci.py) * [Find Max](https://github.com/TheAlgorithms/Python/blob/master/maths/find_max.py) * [Find Max Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/find_max_recursion.py) * [Find Min](https://github.com/TheAlgorithms/Python/blob/master/maths/find_min.py) * [Find Min Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/find_min_recursion.py) * [Floor](https://github.com/TheAlgorithms/Python/blob/master/maths/floor.py) * [Gamma](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma.py) * [Gamma Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma_recursive.py) * [Gaussian](https://github.com/TheAlgorithms/Python/blob/master/maths/gaussian.py) * [Greatest Common Divisor](https://github.com/TheAlgorithms/Python/blob/master/maths/greatest_common_divisor.py) * [Greedy Coin Change](https://github.com/TheAlgorithms/Python/blob/master/maths/greedy_coin_change.py) * [Hardy Ramanujanalgo](https://github.com/TheAlgorithms/Python/blob/master/maths/hardy_ramanujanalgo.py) * [Integration By Simpson Approx](https://github.com/TheAlgorithms/Python/blob/master/maths/integration_by_simpson_approx.py) * [Is Ip V4 Address Valid](https://github.com/TheAlgorithms/Python/blob/master/maths/is_ip_v4_address_valid.py) * [Is Square Free](https://github.com/TheAlgorithms/Python/blob/master/maths/is_square_free.py) * [Jaccard Similarity](https://github.com/TheAlgorithms/Python/blob/master/maths/jaccard_similarity.py) * [Kadanes](https://github.com/TheAlgorithms/Python/blob/master/maths/kadanes.py) * [Karatsuba](https://github.com/TheAlgorithms/Python/blob/master/maths/karatsuba.py) * [Krishnamurthy Number](https://github.com/TheAlgorithms/Python/blob/master/maths/krishnamurthy_number.py) * [Kth Lexicographic Permutation](https://github.com/TheAlgorithms/Python/blob/master/maths/kth_lexicographic_permutation.py) * [Largest Of Very Large Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/largest_of_very_large_numbers.py) * [Largest Subarray Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/largest_subarray_sum.py) * [Least Common Multiple](https://github.com/TheAlgorithms/Python/blob/master/maths/least_common_multiple.py) * [Line Length](https://github.com/TheAlgorithms/Python/blob/master/maths/line_length.py) * [Lucas Lehmer Primality Test](https://github.com/TheAlgorithms/Python/blob/master/maths/lucas_lehmer_primality_test.py) * [Lucas Series](https://github.com/TheAlgorithms/Python/blob/master/maths/lucas_series.py) * [Matrix Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/maths/matrix_exponentiation.py) * [Max Sum Sliding Window](https://github.com/TheAlgorithms/Python/blob/master/maths/max_sum_sliding_window.py) * [Median Of Two Arrays](https://github.com/TheAlgorithms/Python/blob/master/maths/median_of_two_arrays.py) * [Miller Rabin](https://github.com/TheAlgorithms/Python/blob/master/maths/miller_rabin.py) * [Mobius Function](https://github.com/TheAlgorithms/Python/blob/master/maths/mobius_function.py) * [Modular Exponential](https://github.com/TheAlgorithms/Python/blob/master/maths/modular_exponential.py) * [Monte Carlo](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo.py) * [Monte Carlo Dice](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo_dice.py) * [Nevilles Method](https://github.com/TheAlgorithms/Python/blob/master/maths/nevilles_method.py) * [Newton Raphson](https://github.com/TheAlgorithms/Python/blob/master/maths/newton_raphson.py) * [Number Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/number_of_digits.py) * [Numerical Integration](https://github.com/TheAlgorithms/Python/blob/master/maths/numerical_integration.py) * [Perfect Cube](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_cube.py) * [Perfect Number](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_number.py) * [Perfect Square](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_square.py) * [Pi Monte Carlo Estimation](https://github.com/TheAlgorithms/Python/blob/master/maths/pi_monte_carlo_estimation.py) * [Pollard Rho](https://github.com/TheAlgorithms/Python/blob/master/maths/pollard_rho.py) * [Polynomial Evaluation](https://github.com/TheAlgorithms/Python/blob/master/maths/polynomial_evaluation.py) * [Power Using Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/power_using_recursion.py) * [Prime Check](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_check.py) * [Prime Factors](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_factors.py) * [Prime Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_numbers.py) * [Prime Sieve Eratosthenes](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_sieve_eratosthenes.py) * [Primelib](https://github.com/TheAlgorithms/Python/blob/master/maths/primelib.py) * [Proth Number](https://github.com/TheAlgorithms/Python/blob/master/maths/proth_number.py) * [Pythagoras](https://github.com/TheAlgorithms/Python/blob/master/maths/pythagoras.py) * [Qr Decomposition](https://github.com/TheAlgorithms/Python/blob/master/maths/qr_decomposition.py) * [Quadratic Equations Complex Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/quadratic_equations_complex_numbers.py) * [Radians](https://github.com/TheAlgorithms/Python/blob/master/maths/radians.py) * [Radix2 Fft](https://github.com/TheAlgorithms/Python/blob/master/maths/radix2_fft.py) * [Relu](https://github.com/TheAlgorithms/Python/blob/master/maths/relu.py) * [Runge Kutta](https://github.com/TheAlgorithms/Python/blob/master/maths/runge_kutta.py) * [Segmented Sieve](https://github.com/TheAlgorithms/Python/blob/master/maths/segmented_sieve.py) * Series * [Arithmetic](https://github.com/TheAlgorithms/Python/blob/master/maths/series/arithmetic.py) * [Geometric](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric.py) * [Geometric Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric_series.py) * [Harmonic](https://github.com/TheAlgorithms/Python/blob/master/maths/series/harmonic.py) * [Harmonic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/harmonic_series.py) * [Hexagonal Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/series/hexagonal_numbers.py) * [P Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/p_series.py) * [Sieve Of Eratosthenes](https://github.com/TheAlgorithms/Python/blob/master/maths/sieve_of_eratosthenes.py) * [Sigmoid](https://github.com/TheAlgorithms/Python/blob/master/maths/sigmoid.py) * [Simpson Rule](https://github.com/TheAlgorithms/Python/blob/master/maths/simpson_rule.py) * [Sock Merchant](https://github.com/TheAlgorithms/Python/blob/master/maths/sock_merchant.py) * [Softmax](https://github.com/TheAlgorithms/Python/blob/master/maths/softmax.py) * [Square Root](https://github.com/TheAlgorithms/Python/blob/master/maths/square_root.py) * [Sum Of Arithmetic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_arithmetic_series.py) * [Sum Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_digits.py) * [Sum Of Geometric Progression](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_geometric_progression.py) * [Sylvester Sequence](https://github.com/TheAlgorithms/Python/blob/master/maths/sylvester_sequence.py) * [Test Prime Check](https://github.com/TheAlgorithms/Python/blob/master/maths/test_prime_check.py) * [Trapezoidal Rule](https://github.com/TheAlgorithms/Python/blob/master/maths/trapezoidal_rule.py) * [Triplet Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/triplet_sum.py) * [Two Pointer](https://github.com/TheAlgorithms/Python/blob/master/maths/two_pointer.py) * [Two Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/two_sum.py) * [Ugly Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/ugly_numbers.py) * [Volume](https://github.com/TheAlgorithms/Python/blob/master/maths/volume.py) * [Zellers Congruence](https://github.com/TheAlgorithms/Python/blob/master/maths/zellers_congruence.py) ## Matrix * [Count Islands In Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/count_islands_in_matrix.py) * [Inverse Of Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/inverse_of_matrix.py) * [Matrix Class](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_class.py) * [Matrix Operation](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_operation.py) * [Nth Fibonacci Using Matrix Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/matrix/nth_fibonacci_using_matrix_exponentiation.py) * [Rotate Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/rotate_matrix.py) * [Searching In Sorted Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/searching_in_sorted_matrix.py) * [Sherman Morrison](https://github.com/TheAlgorithms/Python/blob/master/matrix/sherman_morrison.py) * [Spiral Print](https://github.com/TheAlgorithms/Python/blob/master/matrix/spiral_print.py) * Tests * [Test Matrix Operation](https://github.com/TheAlgorithms/Python/blob/master/matrix/tests/test_matrix_operation.py) ## Networking Flow * [Ford Fulkerson](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/ford_fulkerson.py) * [Minimum Cut](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/minimum_cut.py) ## Neural Network * [2 Hidden Layers Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/2_hidden_layers_neural_network.py) * [Back Propagation Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/back_propagation_neural_network.py) * [Convolution Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/convolution_neural_network.py) * [Perceptron](https://github.com/TheAlgorithms/Python/blob/master/neural_network/perceptron.py) ## Other * [Activity Selection](https://github.com/TheAlgorithms/Python/blob/master/other/activity_selection.py) * [Alternative List Arrange](https://github.com/TheAlgorithms/Python/blob/master/other/alternative_list_arrange.py) * [Check Strong Password](https://github.com/TheAlgorithms/Python/blob/master/other/check_strong_password.py) * [Davisb Putnamb Logemannb Loveland](https://github.com/TheAlgorithms/Python/blob/master/other/davisb_putnamb_logemannb_loveland.py) * [Dijkstra Bankers Algorithm](https://github.com/TheAlgorithms/Python/blob/master/other/dijkstra_bankers_algorithm.py) * [Doomsday](https://github.com/TheAlgorithms/Python/blob/master/other/doomsday.py) * [Fischer Yates Shuffle](https://github.com/TheAlgorithms/Python/blob/master/other/fischer_yates_shuffle.py) * [Gauss Easter](https://github.com/TheAlgorithms/Python/blob/master/other/gauss_easter.py) * [Graham Scan](https://github.com/TheAlgorithms/Python/blob/master/other/graham_scan.py) * [Greedy](https://github.com/TheAlgorithms/Python/blob/master/other/greedy.py) * [Least Recently Used](https://github.com/TheAlgorithms/Python/blob/master/other/least_recently_used.py) * [Lfu Cache](https://github.com/TheAlgorithms/Python/blob/master/other/lfu_cache.py) * [Linear Congruential Generator](https://github.com/TheAlgorithms/Python/blob/master/other/linear_congruential_generator.py) * [Lru Cache](https://github.com/TheAlgorithms/Python/blob/master/other/lru_cache.py) * [Magicdiamondpattern](https://github.com/TheAlgorithms/Python/blob/master/other/magicdiamondpattern.py) * [Nested Brackets](https://github.com/TheAlgorithms/Python/blob/master/other/nested_brackets.py) * [Password Generator](https://github.com/TheAlgorithms/Python/blob/master/other/password_generator.py) * [Scoring Algorithm](https://github.com/TheAlgorithms/Python/blob/master/other/scoring_algorithm.py) * [Sdes](https://github.com/TheAlgorithms/Python/blob/master/other/sdes.py) * [Tower Of Hanoi](https://github.com/TheAlgorithms/Python/blob/master/other/tower_of_hanoi.py) ## Physics * [N Body Simulation](https://github.com/TheAlgorithms/Python/blob/master/physics/n_body_simulation.py) * [Newtons Second Law Of Motion](https://github.com/TheAlgorithms/Python/blob/master/physics/newtons_second_law_of_motion.py) ## Project Euler * Problem 001 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol4.py) * [Sol5](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol5.py) * [Sol6](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol6.py) * [Sol7](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol7.py) * Problem 002 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol4.py) * [Sol5](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol5.py) * Problem 003 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol3.py) * Problem 004 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_004/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_004/sol2.py) * Problem 005 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_005/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_005/sol2.py) * Problem 006 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol4.py) * Problem 007 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol3.py) * Problem 008 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol3.py) * Problem 009 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol3.py) * Problem 010 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol3.py) * Problem 011 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_011/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_011/sol2.py) * Problem 012 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_012/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_012/sol2.py) * Problem 013 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_013/sol1.py) * Problem 014 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_014/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_014/sol2.py) * Problem 015 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_015/sol1.py) * Problem 016 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_016/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_016/sol2.py) * Problem 017 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_017/sol1.py) * Problem 018 * [Solution](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_018/solution.py) * Problem 019 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_019/sol1.py) * Problem 020 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol4.py) * Problem 021 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_021/sol1.py) * Problem 022 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_022/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_022/sol2.py) * Problem 023 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_023/sol1.py) * Problem 024 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_024/sol1.py) * Problem 025 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol3.py) * Problem 026 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_026/sol1.py) * Problem 027 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_027/sol1.py) * Problem 028 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_028/sol1.py) * Problem 029 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_029/sol1.py) * Problem 030 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_030/sol1.py) * Problem 031 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_031/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_031/sol2.py) * Problem 032 * [Sol32](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_032/sol32.py) * Problem 033 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_033/sol1.py) * Problem 034 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_034/sol1.py) * Problem 035 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_035/sol1.py) * Problem 036 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_036/sol1.py) * Problem 037 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_037/sol1.py) * Problem 038 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_038/sol1.py) * Problem 039 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_039/sol1.py) * Problem 040 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_040/sol1.py) * Problem 041 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_041/sol1.py) * Problem 042 * [Solution42](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_042/solution42.py) * Problem 043 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_043/sol1.py) * Problem 044 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_044/sol1.py) * Problem 045 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_045/sol1.py) * Problem 046 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_046/sol1.py) * Problem 047 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_047/sol1.py) * Problem 048 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_048/sol1.py) * Problem 049 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_049/sol1.py) * Problem 050 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_050/sol1.py) * Problem 051 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_051/sol1.py) * Problem 052 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_052/sol1.py) * Problem 053 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_053/sol1.py) * Problem 054 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_054/sol1.py) * [Test Poker Hand](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_054/test_poker_hand.py) * Problem 055 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_055/sol1.py) * Problem 056 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_056/sol1.py) * Problem 057 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_057/sol1.py) * Problem 058 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_058/sol1.py) * Problem 059 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_059/sol1.py) * Problem 062 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_062/sol1.py) * Problem 063 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_063/sol1.py) * Problem 064 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_064/sol1.py) * Problem 065 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_065/sol1.py) * Problem 067 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_067/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_067/sol2.py) * Problem 069 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_069/sol1.py) * Problem 070 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_070/sol1.py) * Problem 071 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_071/sol1.py) * Problem 072 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_072/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_072/sol2.py) * Problem 074 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_074/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_074/sol2.py) * Problem 075 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_075/sol1.py) * Problem 076 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_076/sol1.py) * Problem 077 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_077/sol1.py) * Problem 078 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_078/sol1.py) * Problem 080 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_080/sol1.py) * Problem 081 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_081/sol1.py) * Problem 085 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_085/sol1.py) * Problem 086 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_086/sol1.py) * Problem 087 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_087/sol1.py) * Problem 089 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_089/sol1.py) * Problem 091 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_091/sol1.py) * Problem 092 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_092/sol1.py) * Problem 097 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_097/sol1.py) * Problem 099 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_099/sol1.py) * Problem 101 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_101/sol1.py) * Problem 102 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_102/sol1.py) * Problem 107 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_107/sol1.py) * Problem 109 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_109/sol1.py) * Problem 112 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_112/sol1.py) * Problem 113 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_113/sol1.py) * Problem 119 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_119/sol1.py) * Problem 120 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_120/sol1.py) * Problem 121 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_121/sol1.py) * Problem 123 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_123/sol1.py) * Problem 125 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_125/sol1.py) * Problem 129 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_129/sol1.py) * Problem 135 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_135/sol1.py) * Problem 144 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_144/sol1.py) * Problem 173 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_173/sol1.py) * Problem 174 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_174/sol1.py) * Problem 180 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_180/sol1.py) * Problem 188 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_188/sol1.py) * Problem 191 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_191/sol1.py) * Problem 203 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_203/sol1.py) * Problem 205 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_205/sol1.py) * Problem 206 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_206/sol1.py) * Problem 207 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_207/sol1.py) * Problem 234 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_234/sol1.py) * Problem 301 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_301/sol1.py) * Problem 493 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_493/sol1.py) * Problem 551 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_551/sol1.py) * Problem 686 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_686/sol1.py) ## Quantum * [Deutsch Jozsa](https://github.com/TheAlgorithms/Python/blob/master/quantum/deutsch_jozsa.py) * [Half Adder](https://github.com/TheAlgorithms/Python/blob/master/quantum/half_adder.py) * [Not Gate](https://github.com/TheAlgorithms/Python/blob/master/quantum/not_gate.py) * [Quantum Entanglement](https://github.com/TheAlgorithms/Python/blob/master/quantum/quantum_entanglement.py) * [Ripple Adder Classic](https://github.com/TheAlgorithms/Python/blob/master/quantum/ripple_adder_classic.py) * [Single Qubit Measure](https://github.com/TheAlgorithms/Python/blob/master/quantum/single_qubit_measure.py) ## Scheduling * [First Come First Served](https://github.com/TheAlgorithms/Python/blob/master/scheduling/first_come_first_served.py) * [Round Robin](https://github.com/TheAlgorithms/Python/blob/master/scheduling/round_robin.py) * [Shortest Job First](https://github.com/TheAlgorithms/Python/blob/master/scheduling/shortest_job_first.py) ## Searches * [Binary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/binary_search.py) * [Binary Tree Traversal](https://github.com/TheAlgorithms/Python/blob/master/searches/binary_tree_traversal.py) * [Double Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/double_linear_search.py) * [Double Linear Search Recursion](https://github.com/TheAlgorithms/Python/blob/master/searches/double_linear_search_recursion.py) * [Fibonacci Search](https://github.com/TheAlgorithms/Python/blob/master/searches/fibonacci_search.py) * [Hill Climbing](https://github.com/TheAlgorithms/Python/blob/master/searches/hill_climbing.py) * [Interpolation Search](https://github.com/TheAlgorithms/Python/blob/master/searches/interpolation_search.py) * [Jump Search](https://github.com/TheAlgorithms/Python/blob/master/searches/jump_search.py) * [Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/linear_search.py) * [Quick Select](https://github.com/TheAlgorithms/Python/blob/master/searches/quick_select.py) * [Sentinel Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/sentinel_linear_search.py) * [Simple Binary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/simple_binary_search.py) * [Simulated Annealing](https://github.com/TheAlgorithms/Python/blob/master/searches/simulated_annealing.py) * [Tabu Search](https://github.com/TheAlgorithms/Python/blob/master/searches/tabu_search.py) * [Ternary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/ternary_search.py) ## Sorts * [Bead Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bead_sort.py) * [Bitonic Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bitonic_sort.py) * [Bogo Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bogo_sort.py) * [Bubble Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bubble_sort.py) * [Bucket Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bucket_sort.py) * [Cocktail Shaker Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/cocktail_shaker_sort.py) * [Comb Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/comb_sort.py) * [Counting Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/counting_sort.py) * [Cycle Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/cycle_sort.py) * [Double Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/double_sort.py) * [Dutch National Flag Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/dutch_national_flag_sort.py) * [Exchange Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/exchange_sort.py) * [External Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/external_sort.py) * [Gnome Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/gnome_sort.py) * [Heap Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/heap_sort.py) * [Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/insertion_sort.py) * [Intro Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/intro_sort.py) * [Iterative Merge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/iterative_merge_sort.py) * [Merge Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/merge_insertion_sort.py) * [Merge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/merge_sort.py) * [Msd Radix Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/msd_radix_sort.py) * [Natural Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/natural_sort.py) * [Odd Even Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_sort.py) * [Odd Even Transposition Parallel](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_transposition_parallel.py) * [Odd Even Transposition Single Threaded](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_transposition_single_threaded.py) * [Pancake Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pancake_sort.py) * [Patience Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/patience_sort.py) * [Pigeon Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pigeon_sort.py) * [Pigeonhole Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pigeonhole_sort.py) * [Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/quick_sort.py) * [Quick Sort 3 Partition](https://github.com/TheAlgorithms/Python/blob/master/sorts/quick_sort_3_partition.py) * [Radix Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/radix_sort.py) * [Random Normal Distribution Quicksort](https://github.com/TheAlgorithms/Python/blob/master/sorts/random_normal_distribution_quicksort.py) * [Random Pivot Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/random_pivot_quick_sort.py) * [Recursive Bubble Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_bubble_sort.py) * [Recursive Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_insertion_sort.py) * [Recursive Mergesort Array](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_mergesort_array.py) * [Recursive Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_quick_sort.py) * [Selection Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/selection_sort.py) * [Shell Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/shell_sort.py) * [Slowsort](https://github.com/TheAlgorithms/Python/blob/master/sorts/slowsort.py) * [Stooge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/stooge_sort.py) * [Strand Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/strand_sort.py) * [Tim Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/tim_sort.py) * [Topological Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/topological_sort.py) * [Tree Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/tree_sort.py) * [Unknown Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/unknown_sort.py) * [Wiggle Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/wiggle_sort.py) ## Strings * [Aho Corasick](https://github.com/TheAlgorithms/Python/blob/master/strings/aho_corasick.py) * [Alternative String Arrange](https://github.com/TheAlgorithms/Python/blob/master/strings/alternative_string_arrange.py) * [Anagrams](https://github.com/TheAlgorithms/Python/blob/master/strings/anagrams.py) * [Autocomplete Using Trie](https://github.com/TheAlgorithms/Python/blob/master/strings/autocomplete_using_trie.py) * [Boyer Moore Search](https://github.com/TheAlgorithms/Python/blob/master/strings/boyer_moore_search.py) * [Can String Be Rearranged As Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/can_string_be_rearranged_as_palindrome.py) * [Capitalize](https://github.com/TheAlgorithms/Python/blob/master/strings/capitalize.py) * [Check Anagrams](https://github.com/TheAlgorithms/Python/blob/master/strings/check_anagrams.py) * [Check Pangram](https://github.com/TheAlgorithms/Python/blob/master/strings/check_pangram.py) * [Credit Card Validator](https://github.com/TheAlgorithms/Python/blob/master/strings/credit_card_validator.py) * [Detecting English Programmatically](https://github.com/TheAlgorithms/Python/blob/master/strings/detecting_english_programmatically.py) * [Frequency Finder](https://github.com/TheAlgorithms/Python/blob/master/strings/frequency_finder.py) * [Indian Phone Validator](https://github.com/TheAlgorithms/Python/blob/master/strings/indian_phone_validator.py) * [Is Contains Unique Chars](https://github.com/TheAlgorithms/Python/blob/master/strings/is_contains_unique_chars.py) * [Is Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/is_palindrome.py) * [Jaro Winkler](https://github.com/TheAlgorithms/Python/blob/master/strings/jaro_winkler.py) * [Join](https://github.com/TheAlgorithms/Python/blob/master/strings/join.py) * [Knuth Morris Pratt](https://github.com/TheAlgorithms/Python/blob/master/strings/knuth_morris_pratt.py) * [Levenshtein Distance](https://github.com/TheAlgorithms/Python/blob/master/strings/levenshtein_distance.py) * [Lower](https://github.com/TheAlgorithms/Python/blob/master/strings/lower.py) * [Manacher](https://github.com/TheAlgorithms/Python/blob/master/strings/manacher.py) * [Min Cost String Conversion](https://github.com/TheAlgorithms/Python/blob/master/strings/min_cost_string_conversion.py) * [Naive String Search](https://github.com/TheAlgorithms/Python/blob/master/strings/naive_string_search.py) * [Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/palindrome.py) * [Prefix Function](https://github.com/TheAlgorithms/Python/blob/master/strings/prefix_function.py) * [Rabin Karp](https://github.com/TheAlgorithms/Python/blob/master/strings/rabin_karp.py) * [Remove Duplicate](https://github.com/TheAlgorithms/Python/blob/master/strings/remove_duplicate.py) * [Reverse Letters](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_letters.py) * [Reverse Long Words](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_long_words.py) * [Reverse Words](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_words.py) * [Split](https://github.com/TheAlgorithms/Python/blob/master/strings/split.py) * [Upper](https://github.com/TheAlgorithms/Python/blob/master/strings/upper.py) * [Wildcard Pattern Matching](https://github.com/TheAlgorithms/Python/blob/master/strings/wildcard_pattern_matching.py) * [Word Occurrence](https://github.com/TheAlgorithms/Python/blob/master/strings/word_occurrence.py) * [Word Patterns](https://github.com/TheAlgorithms/Python/blob/master/strings/word_patterns.py) * [Z Function](https://github.com/TheAlgorithms/Python/blob/master/strings/z_function.py) ## Web Programming * [Co2 Emission](https://github.com/TheAlgorithms/Python/blob/master/web_programming/co2_emission.py) * [Covid Stats Via Xpath](https://github.com/TheAlgorithms/Python/blob/master/web_programming/covid_stats_via_xpath.py) * [Crawl Google Results](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_results.py) * [Crawl Google Scholar Citation](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_scholar_citation.py) * [Currency Converter](https://github.com/TheAlgorithms/Python/blob/master/web_programming/currency_converter.py) * [Current Stock Price](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_stock_price.py) * [Current Weather](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_weather.py) * [Daily Horoscope](https://github.com/TheAlgorithms/Python/blob/master/web_programming/daily_horoscope.py) * [Download Images From Google Query](https://github.com/TheAlgorithms/Python/blob/master/web_programming/download_images_from_google_query.py) * [Emails From Url](https://github.com/TheAlgorithms/Python/blob/master/web_programming/emails_from_url.py) * [Fetch Bbc News](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_bbc_news.py) * [Fetch Github Info](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_github_info.py) * [Fetch Jobs](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_jobs.py) * [Get Imdb Top 250 Movies Csv](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_imdb_top_250_movies_csv.py) * [Get Imdbtop](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_imdbtop.py) * [Get Top Hn Posts](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_top_hn_posts.py) * [Get User Tweets](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_user_tweets.py) * [Giphy](https://github.com/TheAlgorithms/Python/blob/master/web_programming/giphy.py) * [Instagram Crawler](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_crawler.py) * [Instagram Pic](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_pic.py) * [Instagram Video](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_video.py) * [Nasa Data](https://github.com/TheAlgorithms/Python/blob/master/web_programming/nasa_data.py) * [Random Anime Character](https://github.com/TheAlgorithms/Python/blob/master/web_programming/random_anime_character.py) * [Recaptcha Verification](https://github.com/TheAlgorithms/Python/blob/master/web_programming/recaptcha_verification.py) * [Reddit](https://github.com/TheAlgorithms/Python/blob/master/web_programming/reddit.py) * [Search Books By Isbn](https://github.com/TheAlgorithms/Python/blob/master/web_programming/search_books_by_isbn.py) * [Slack Message](https://github.com/TheAlgorithms/Python/blob/master/web_programming/slack_message.py) * [Test Fetch Github Info](https://github.com/TheAlgorithms/Python/blob/master/web_programming/test_fetch_github_info.py) * [World Covid19 Stats](https://github.com/TheAlgorithms/Python/blob/master/web_programming/world_covid19_stats.py)
## Arithmetic Analysis * [Bisection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/bisection.py) * [Gaussian Elimination](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/gaussian_elimination.py) * [In Static Equilibrium](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/in_static_equilibrium.py) * [Intersection](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/intersection.py) * [Jacobi Iteration Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/jacobi_iteration_method.py) * [Lu Decomposition](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/lu_decomposition.py) * [Newton Forward Interpolation](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_forward_interpolation.py) * [Newton Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_method.py) * [Newton Raphson](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/newton_raphson.py) * [Secant Method](https://github.com/TheAlgorithms/Python/blob/master/arithmetic_analysis/secant_method.py) ## Audio Filters * [Butterworth Filter](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/butterworth_filter.py) * [Iir Filter](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/iir_filter.py) * [Show Response](https://github.com/TheAlgorithms/Python/blob/master/audio_filters/show_response.py) ## Backtracking * [All Combinations](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_combinations.py) * [All Permutations](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_permutations.py) * [All Subsequences](https://github.com/TheAlgorithms/Python/blob/master/backtracking/all_subsequences.py) * [Coloring](https://github.com/TheAlgorithms/Python/blob/master/backtracking/coloring.py) * [Hamiltonian Cycle](https://github.com/TheAlgorithms/Python/blob/master/backtracking/hamiltonian_cycle.py) * [Knight Tour](https://github.com/TheAlgorithms/Python/blob/master/backtracking/knight_tour.py) * [Minimax](https://github.com/TheAlgorithms/Python/blob/master/backtracking/minimax.py) * [N Queens](https://github.com/TheAlgorithms/Python/blob/master/backtracking/n_queens.py) * [N Queens Math](https://github.com/TheAlgorithms/Python/blob/master/backtracking/n_queens_math.py) * [Rat In Maze](https://github.com/TheAlgorithms/Python/blob/master/backtracking/rat_in_maze.py) * [Sudoku](https://github.com/TheAlgorithms/Python/blob/master/backtracking/sudoku.py) * [Sum Of Subsets](https://github.com/TheAlgorithms/Python/blob/master/backtracking/sum_of_subsets.py) ## Bit Manipulation * [Binary And Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_and_operator.py) * [Binary Count Setbits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_count_setbits.py) * [Binary Count Trailing Zeros](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_count_trailing_zeros.py) * [Binary Or Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_or_operator.py) * [Binary Shifts](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_shifts.py) * [Binary Twos Complement](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_twos_complement.py) * [Binary Xor Operator](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/binary_xor_operator.py) * [Count 1S Brian Kernighan Method](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/count_1s_brian_kernighan_method.py) * [Count Number Of One Bits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/count_number_of_one_bits.py) * [Gray Code Sequence](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/gray_code_sequence.py) * [Reverse Bits](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/reverse_bits.py) * [Single Bit Manipulation Operations](https://github.com/TheAlgorithms/Python/blob/master/bit_manipulation/single_bit_manipulation_operations.py) ## Blockchain * [Chinese Remainder Theorem](https://github.com/TheAlgorithms/Python/blob/master/blockchain/chinese_remainder_theorem.py) * [Diophantine Equation](https://github.com/TheAlgorithms/Python/blob/master/blockchain/diophantine_equation.py) * [Modular Division](https://github.com/TheAlgorithms/Python/blob/master/blockchain/modular_division.py) ## Boolean Algebra * [Quine Mc Cluskey](https://github.com/TheAlgorithms/Python/blob/master/boolean_algebra/quine_mc_cluskey.py) ## Cellular Automata * [Conways Game Of Life](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/conways_game_of_life.py) * [Game Of Life](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/game_of_life.py) * [Nagel Schrekenberg](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/nagel_schrekenberg.py) * [One Dimensional](https://github.com/TheAlgorithms/Python/blob/master/cellular_automata/one_dimensional.py) ## Ciphers * [A1Z26](https://github.com/TheAlgorithms/Python/blob/master/ciphers/a1z26.py) * [Affine Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/affine_cipher.py) * [Atbash](https://github.com/TheAlgorithms/Python/blob/master/ciphers/atbash.py) * [Baconian Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/baconian_cipher.py) * [Base16](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base16.py) * [Base32](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base32.py) * [Base64](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base64.py) * [Base85](https://github.com/TheAlgorithms/Python/blob/master/ciphers/base85.py) * [Beaufort Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/beaufort_cipher.py) * [Bifid](https://github.com/TheAlgorithms/Python/blob/master/ciphers/bifid.py) * [Brute Force Caesar Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/brute_force_caesar_cipher.py) * [Caesar Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/caesar_cipher.py) * [Cryptomath Module](https://github.com/TheAlgorithms/Python/blob/master/ciphers/cryptomath_module.py) * [Decrypt Caesar With Chi Squared](https://github.com/TheAlgorithms/Python/blob/master/ciphers/decrypt_caesar_with_chi_squared.py) * [Deterministic Miller Rabin](https://github.com/TheAlgorithms/Python/blob/master/ciphers/deterministic_miller_rabin.py) * [Diffie](https://github.com/TheAlgorithms/Python/blob/master/ciphers/diffie.py) * [Diffie Hellman](https://github.com/TheAlgorithms/Python/blob/master/ciphers/diffie_hellman.py) * [Elgamal Key Generator](https://github.com/TheAlgorithms/Python/blob/master/ciphers/elgamal_key_generator.py) * [Enigma Machine2](https://github.com/TheAlgorithms/Python/blob/master/ciphers/enigma_machine2.py) * [Hill Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/hill_cipher.py) * [Mixed Keyword Cypher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/mixed_keyword_cypher.py) * [Mono Alphabetic Ciphers](https://github.com/TheAlgorithms/Python/blob/master/ciphers/mono_alphabetic_ciphers.py) * [Morse Code](https://github.com/TheAlgorithms/Python/blob/master/ciphers/morse_code.py) * [Onepad Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/onepad_cipher.py) * [Playfair Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/playfair_cipher.py) * [Polybius](https://github.com/TheAlgorithms/Python/blob/master/ciphers/polybius.py) * [Porta Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/porta_cipher.py) * [Rabin Miller](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rabin_miller.py) * [Rail Fence Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rail_fence_cipher.py) * [Rot13](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rot13.py) * [Rsa Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_cipher.py) * [Rsa Factorization](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_factorization.py) * [Rsa Key Generator](https://github.com/TheAlgorithms/Python/blob/master/ciphers/rsa_key_generator.py) * [Shuffled Shift Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/shuffled_shift_cipher.py) * [Simple Keyword Cypher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/simple_keyword_cypher.py) * [Simple Substitution Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/simple_substitution_cipher.py) * [Trafid Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/trafid_cipher.py) * [Transposition Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/transposition_cipher.py) * [Transposition Cipher Encrypt Decrypt File](https://github.com/TheAlgorithms/Python/blob/master/ciphers/transposition_cipher_encrypt_decrypt_file.py) * [Vigenere Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/vigenere_cipher.py) * [Xor Cipher](https://github.com/TheAlgorithms/Python/blob/master/ciphers/xor_cipher.py) ## Compression * [Burrows Wheeler](https://github.com/TheAlgorithms/Python/blob/master/compression/burrows_wheeler.py) * [Huffman](https://github.com/TheAlgorithms/Python/blob/master/compression/huffman.py) * [Lempel Ziv](https://github.com/TheAlgorithms/Python/blob/master/compression/lempel_ziv.py) * [Lempel Ziv Decompress](https://github.com/TheAlgorithms/Python/blob/master/compression/lempel_ziv_decompress.py) * [Peak Signal To Noise Ratio](https://github.com/TheAlgorithms/Python/blob/master/compression/peak_signal_to_noise_ratio.py) ## Computer Vision * [Cnn Classification](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/cnn_classification.py) * [Flip Augmentation](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/flip_augmentation.py) * [Harris Corner](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/harris_corner.py) * [Mean Threshold](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/mean_threshold.py) * [Mosaic Augmentation](https://github.com/TheAlgorithms/Python/blob/master/computer_vision/mosaic_augmentation.py) ## Conversions * [Binary To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_decimal.py) * [Binary To Hexadecimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_hexadecimal.py) * [Binary To Octal](https://github.com/TheAlgorithms/Python/blob/master/conversions/binary_to_octal.py) * [Decimal To Any](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_any.py) * [Decimal To Binary](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_binary.py) * [Decimal To Binary Recursion](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_binary_recursion.py) * [Decimal To Hexadecimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_hexadecimal.py) * [Decimal To Octal](https://github.com/TheAlgorithms/Python/blob/master/conversions/decimal_to_octal.py) * [Hex To Bin](https://github.com/TheAlgorithms/Python/blob/master/conversions/hex_to_bin.py) * [Hexadecimal To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/hexadecimal_to_decimal.py) * [Length Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/length_conversion.py) * [Molecular Chemistry](https://github.com/TheAlgorithms/Python/blob/master/conversions/molecular_chemistry.py) * [Octal To Decimal](https://github.com/TheAlgorithms/Python/blob/master/conversions/octal_to_decimal.py) * [Prefix Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/prefix_conversions.py) * [Pressure Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/pressure_conversions.py) * [Rgb Hsv Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/rgb_hsv_conversion.py) * [Roman Numerals](https://github.com/TheAlgorithms/Python/blob/master/conversions/roman_numerals.py) * [Temperature Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/temperature_conversions.py) * [Volume Conversions](https://github.com/TheAlgorithms/Python/blob/master/conversions/volume_conversions.py) * [Weight Conversion](https://github.com/TheAlgorithms/Python/blob/master/conversions/weight_conversion.py) ## Data Structures * Binary Tree * [Avl Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/avl_tree.py) * [Basic Binary Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/basic_binary_tree.py) * [Binary Search Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_search_tree.py) * [Binary Search Tree Recursive](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_search_tree_recursive.py) * [Binary Tree Mirror](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_tree_mirror.py) * [Binary Tree Traversals](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/binary_tree_traversals.py) * [Fenwick Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/fenwick_tree.py) * [Lazy Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/lazy_segment_tree.py) * [Lowest Common Ancestor](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/lowest_common_ancestor.py) * [Merge Two Binary Trees](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/merge_two_binary_trees.py) * [Non Recursive Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/non_recursive_segment_tree.py) * [Number Of Possible Binary Trees](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/number_of_possible_binary_trees.py) * [Red Black Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/red_black_tree.py) * [Segment Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/segment_tree.py) * [Segment Tree Other](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/segment_tree_other.py) * [Treap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/treap.py) * [Wavelet Tree](https://github.com/TheAlgorithms/Python/blob/master/data_structures/binary_tree/wavelet_tree.py) * Disjoint Set * [Alternate Disjoint Set](https://github.com/TheAlgorithms/Python/blob/master/data_structures/disjoint_set/alternate_disjoint_set.py) * [Disjoint Set](https://github.com/TheAlgorithms/Python/blob/master/data_structures/disjoint_set/disjoint_set.py) * Hashing * [Double Hash](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/double_hash.py) * [Hash Table](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/hash_table.py) * [Hash Table With Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/hash_table_with_linked_list.py) * Number Theory * [Prime Numbers](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/number_theory/prime_numbers.py) * [Quadratic Probing](https://github.com/TheAlgorithms/Python/blob/master/data_structures/hashing/quadratic_probing.py) * Heap * [Binomial Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/binomial_heap.py) * [Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/heap.py) * [Heap Generic](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/heap_generic.py) * [Max Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/max_heap.py) * [Min Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/min_heap.py) * [Randomized Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/randomized_heap.py) * [Skew Heap](https://github.com/TheAlgorithms/Python/blob/master/data_structures/heap/skew_heap.py) * Linked List * [Circular Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/circular_linked_list.py) * [Deque Doubly](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/deque_doubly.py) * [Doubly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/doubly_linked_list.py) * [Doubly Linked List Two](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/doubly_linked_list_two.py) * [From Sequence](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/from_sequence.py) * [Has Loop](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/has_loop.py) * [Is Palindrome](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/is_palindrome.py) * [Merge Two Lists](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/merge_two_lists.py) * [Middle Element Of Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/middle_element_of_linked_list.py) * [Print Reverse](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/print_reverse.py) * [Singly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/singly_linked_list.py) * [Skip List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/skip_list.py) * [Swap Nodes](https://github.com/TheAlgorithms/Python/blob/master/data_structures/linked_list/swap_nodes.py) * Queue * [Circular Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/circular_queue.py) * [Circular Queue Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/circular_queue_linked_list.py) * [Double Ended Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/double_ended_queue.py) * [Linked Queue](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/linked_queue.py) * [Priority Queue Using List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/priority_queue_using_list.py) * [Queue On List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/queue_on_list.py) * [Queue On Pseudo Stack](https://github.com/TheAlgorithms/Python/blob/master/data_structures/queue/queue_on_pseudo_stack.py) * Stacks * [Balanced Parentheses](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/balanced_parentheses.py) * [Dijkstras Two Stack Algorithm](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/dijkstras_two_stack_algorithm.py) * [Evaluate Postfix Notations](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/evaluate_postfix_notations.py) * [Infix To Postfix Conversion](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/infix_to_postfix_conversion.py) * [Infix To Prefix Conversion](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/infix_to_prefix_conversion.py) * [Next Greater Element](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/next_greater_element.py) * [Postfix Evaluation](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/postfix_evaluation.py) * [Prefix Evaluation](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/prefix_evaluation.py) * [Stack](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack.py) * [Stack With Doubly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack_with_doubly_linked_list.py) * [Stack With Singly Linked List](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stack_with_singly_linked_list.py) * [Stock Span Problem](https://github.com/TheAlgorithms/Python/blob/master/data_structures/stacks/stock_span_problem.py) * Trie * [Trie](https://github.com/TheAlgorithms/Python/blob/master/data_structures/trie/trie.py) ## Digital Image Processing * [Change Brightness](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/change_brightness.py) * [Change Contrast](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/change_contrast.py) * [Convert To Negative](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/convert_to_negative.py) * Dithering * [Burkes](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/dithering/burkes.py) * Edge Detection * [Canny](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/edge_detection/canny.py) * Filters * [Bilateral Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/bilateral_filter.py) * [Convolve](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/convolve.py) * [Gabor Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/gabor_filter.py) * [Gaussian Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/gaussian_filter.py) * [Median Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/median_filter.py) * [Sobel Filter](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/filters/sobel_filter.py) * Histogram Equalization * [Histogram Stretch](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/histogram_equalization/histogram_stretch.py) * [Index Calculation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/index_calculation.py) * Morphological Operations * [Dilation Operation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/morphological_operations/dilation_operation.py) * [Erosion Operation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/morphological_operations/erosion_operation.py) * Resize * [Resize](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/resize/resize.py) * Rotation * [Rotation](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/rotation/rotation.py) * [Sepia](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/sepia.py) * [Test Digital Image Processing](https://github.com/TheAlgorithms/Python/blob/master/digital_image_processing/test_digital_image_processing.py) ## Divide And Conquer * [Closest Pair Of Points](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/closest_pair_of_points.py) * [Convex Hull](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/convex_hull.py) * [Heaps Algorithm](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/heaps_algorithm.py) * [Heaps Algorithm Iterative](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/heaps_algorithm_iterative.py) * [Inversions](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/inversions.py) * [Kth Order Statistic](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/kth_order_statistic.py) * [Max Difference Pair](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/max_difference_pair.py) * [Max Subarray Sum](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/max_subarray_sum.py) * [Mergesort](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/mergesort.py) * [Peak](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/peak.py) * [Power](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/power.py) * [Strassen Matrix Multiplication](https://github.com/TheAlgorithms/Python/blob/master/divide_and_conquer/strassen_matrix_multiplication.py) ## Dynamic Programming * [Abbreviation](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/abbreviation.py) * [All Construct](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/all_construct.py) * [Bitmask](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/bitmask.py) * [Catalan Numbers](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/catalan_numbers.py) * [Climbing Stairs](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/climbing_stairs.py) * [Edit Distance](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/edit_distance.py) * [Factorial](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/factorial.py) * [Fast Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fast_fibonacci.py) * [Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fibonacci.py) * [Floyd Warshall](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/floyd_warshall.py) * [Fractional Knapsack](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fractional_knapsack.py) * [Fractional Knapsack 2](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/fractional_knapsack_2.py) * [Integer Partition](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/integer_partition.py) * [Iterating Through Submasks](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/iterating_through_submasks.py) * [Knapsack](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/knapsack.py) * [Longest Common Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_common_subsequence.py) * [Longest Increasing Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_increasing_subsequence.py) * [Longest Increasing Subsequence O(Nlogn)](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_increasing_subsequence_o(nlogn).py) * [Longest Sub Array](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/longest_sub_array.py) * [Matrix Chain Order](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/matrix_chain_order.py) * [Max Non Adjacent Sum](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_non_adjacent_sum.py) * [Max Sub Array](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_sub_array.py) * [Max Sum Contiguous Subsequence](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/max_sum_contiguous_subsequence.py) * [Minimum Coin Change](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_coin_change.py) * [Minimum Cost Path](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_cost_path.py) * [Minimum Partition](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_partition.py) * [Minimum Steps To One](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/minimum_steps_to_one.py) * [Optimal Binary Search Tree](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/optimal_binary_search_tree.py) * [Rod Cutting](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/rod_cutting.py) * [Subset Generation](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/subset_generation.py) * [Sum Of Subset](https://github.com/TheAlgorithms/Python/blob/master/dynamic_programming/sum_of_subset.py) ## Electronics * [Carrier Concentration](https://github.com/TheAlgorithms/Python/blob/master/electronics/carrier_concentration.py) * [Coulombs Law](https://github.com/TheAlgorithms/Python/blob/master/electronics/coulombs_law.py) * [Electric Power](https://github.com/TheAlgorithms/Python/blob/master/electronics/electric_power.py) * [Ohms Law](https://github.com/TheAlgorithms/Python/blob/master/electronics/ohms_law.py) ## File Transfer * [Receive File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/receive_file.py) * [Send File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/send_file.py) * Tests * [Test Send File](https://github.com/TheAlgorithms/Python/blob/master/file_transfer/tests/test_send_file.py) ## Financial * [Equated Monthly Installments](https://github.com/TheAlgorithms/Python/blob/master/financial/equated_monthly_installments.py) * [Interest](https://github.com/TheAlgorithms/Python/blob/master/financial/interest.py) ## Fractals * [Julia Sets](https://github.com/TheAlgorithms/Python/blob/master/fractals/julia_sets.py) * [Koch Snowflake](https://github.com/TheAlgorithms/Python/blob/master/fractals/koch_snowflake.py) * [Mandelbrot](https://github.com/TheAlgorithms/Python/blob/master/fractals/mandelbrot.py) * [Sierpinski Triangle](https://github.com/TheAlgorithms/Python/blob/master/fractals/sierpinski_triangle.py) ## Fuzzy Logic * [Fuzzy Operations](https://github.com/TheAlgorithms/Python/blob/master/fuzzy_logic/fuzzy_operations.py) ## Genetic Algorithm * [Basic String](https://github.com/TheAlgorithms/Python/blob/master/genetic_algorithm/basic_string.py) ## Geodesy * [Haversine Distance](https://github.com/TheAlgorithms/Python/blob/master/geodesy/haversine_distance.py) * [Lamberts Ellipsoidal Distance](https://github.com/TheAlgorithms/Python/blob/master/geodesy/lamberts_ellipsoidal_distance.py) ## Graphics * [Bezier Curve](https://github.com/TheAlgorithms/Python/blob/master/graphics/bezier_curve.py) * [Vector3 For 2D Rendering](https://github.com/TheAlgorithms/Python/blob/master/graphics/vector3_for_2d_rendering.py) ## Graphs * [A Star](https://github.com/TheAlgorithms/Python/blob/master/graphs/a_star.py) * [Articulation Points](https://github.com/TheAlgorithms/Python/blob/master/graphs/articulation_points.py) * [Basic Graphs](https://github.com/TheAlgorithms/Python/blob/master/graphs/basic_graphs.py) * [Bellman Ford](https://github.com/TheAlgorithms/Python/blob/master/graphs/bellman_ford.py) * [Bfs Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/bfs_shortest_path.py) * [Bfs Zero One Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/bfs_zero_one_shortest_path.py) * [Bidirectional A Star](https://github.com/TheAlgorithms/Python/blob/master/graphs/bidirectional_a_star.py) * [Bidirectional Breadth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/bidirectional_breadth_first_search.py) * [Boruvka](https://github.com/TheAlgorithms/Python/blob/master/graphs/boruvka.py) * [Breadth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search.py) * [Breadth First Search 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search_2.py) * [Breadth First Search Shortest Path](https://github.com/TheAlgorithms/Python/blob/master/graphs/breadth_first_search_shortest_path.py) * [Check Bipartite Graph Bfs](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_bipartite_graph_bfs.py) * [Check Bipartite Graph Dfs](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_bipartite_graph_dfs.py) * [Check Cycle](https://github.com/TheAlgorithms/Python/blob/master/graphs/check_cycle.py) * [Connected Components](https://github.com/TheAlgorithms/Python/blob/master/graphs/connected_components.py) * [Depth First Search](https://github.com/TheAlgorithms/Python/blob/master/graphs/depth_first_search.py) * [Depth First Search 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/depth_first_search_2.py) * [Dijkstra](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra.py) * [Dijkstra 2](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra_2.py) * [Dijkstra Algorithm](https://github.com/TheAlgorithms/Python/blob/master/graphs/dijkstra_algorithm.py) * [Dinic](https://github.com/TheAlgorithms/Python/blob/master/graphs/dinic.py) * [Directed And Undirected (Weighted) Graph](https://github.com/TheAlgorithms/Python/blob/master/graphs/directed_and_undirected_(weighted)_graph.py) * [Edmonds Karp Multiple Source And Sink](https://github.com/TheAlgorithms/Python/blob/master/graphs/edmonds_karp_multiple_source_and_sink.py) * [Eulerian Path And Circuit For Undirected Graph](https://github.com/TheAlgorithms/Python/blob/master/graphs/eulerian_path_and_circuit_for_undirected_graph.py) * [Even Tree](https://github.com/TheAlgorithms/Python/blob/master/graphs/even_tree.py) * [Finding Bridges](https://github.com/TheAlgorithms/Python/blob/master/graphs/finding_bridges.py) * [Frequent Pattern Graph Miner](https://github.com/TheAlgorithms/Python/blob/master/graphs/frequent_pattern_graph_miner.py) * [G Topological Sort](https://github.com/TheAlgorithms/Python/blob/master/graphs/g_topological_sort.py) * [Gale Shapley Bigraph](https://github.com/TheAlgorithms/Python/blob/master/graphs/gale_shapley_bigraph.py) * [Graph List](https://github.com/TheAlgorithms/Python/blob/master/graphs/graph_list.py) * [Graph Matrix](https://github.com/TheAlgorithms/Python/blob/master/graphs/graph_matrix.py) * [Graphs Floyd Warshall](https://github.com/TheAlgorithms/Python/blob/master/graphs/graphs_floyd_warshall.py) * [Greedy Best First](https://github.com/TheAlgorithms/Python/blob/master/graphs/greedy_best_first.py) * [Greedy Min Vertex Cover](https://github.com/TheAlgorithms/Python/blob/master/graphs/greedy_min_vertex_cover.py) * [Kahns Algorithm Long](https://github.com/TheAlgorithms/Python/blob/master/graphs/kahns_algorithm_long.py) * [Kahns Algorithm Topo](https://github.com/TheAlgorithms/Python/blob/master/graphs/kahns_algorithm_topo.py) * [Karger](https://github.com/TheAlgorithms/Python/blob/master/graphs/karger.py) * [Markov Chain](https://github.com/TheAlgorithms/Python/blob/master/graphs/markov_chain.py) * [Matching Min Vertex Cover](https://github.com/TheAlgorithms/Python/blob/master/graphs/matching_min_vertex_cover.py) * [Minimum Spanning Tree Boruvka](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_boruvka.py) * [Minimum Spanning Tree Kruskal](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_kruskal.py) * [Minimum Spanning Tree Kruskal2](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_kruskal2.py) * [Minimum Spanning Tree Prims](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_prims.py) * [Minimum Spanning Tree Prims2](https://github.com/TheAlgorithms/Python/blob/master/graphs/minimum_spanning_tree_prims2.py) * [Multi Heuristic Astar](https://github.com/TheAlgorithms/Python/blob/master/graphs/multi_heuristic_astar.py) * [Page Rank](https://github.com/TheAlgorithms/Python/blob/master/graphs/page_rank.py) * [Prim](https://github.com/TheAlgorithms/Python/blob/master/graphs/prim.py) * [Random Graph Generator](https://github.com/TheAlgorithms/Python/blob/master/graphs/random_graph_generator.py) * [Scc Kosaraju](https://github.com/TheAlgorithms/Python/blob/master/graphs/scc_kosaraju.py) * [Strongly Connected Components](https://github.com/TheAlgorithms/Python/blob/master/graphs/strongly_connected_components.py) * [Tarjans Scc](https://github.com/TheAlgorithms/Python/blob/master/graphs/tarjans_scc.py) * Tests * [Test Min Spanning Tree Kruskal](https://github.com/TheAlgorithms/Python/blob/master/graphs/tests/test_min_spanning_tree_kruskal.py) * [Test Min Spanning Tree Prim](https://github.com/TheAlgorithms/Python/blob/master/graphs/tests/test_min_spanning_tree_prim.py) ## Greedy Methods * [Optimal Merge Pattern](https://github.com/TheAlgorithms/Python/blob/master/greedy_methods/optimal_merge_pattern.py) ## Hashes * [Adler32](https://github.com/TheAlgorithms/Python/blob/master/hashes/adler32.py) * [Chaos Machine](https://github.com/TheAlgorithms/Python/blob/master/hashes/chaos_machine.py) * [Djb2](https://github.com/TheAlgorithms/Python/blob/master/hashes/djb2.py) * [Enigma Machine](https://github.com/TheAlgorithms/Python/blob/master/hashes/enigma_machine.py) * [Hamming Code](https://github.com/TheAlgorithms/Python/blob/master/hashes/hamming_code.py) * [Luhn](https://github.com/TheAlgorithms/Python/blob/master/hashes/luhn.py) * [Md5](https://github.com/TheAlgorithms/Python/blob/master/hashes/md5.py) * [Sdbm](https://github.com/TheAlgorithms/Python/blob/master/hashes/sdbm.py) * [Sha1](https://github.com/TheAlgorithms/Python/blob/master/hashes/sha1.py) * [Sha256](https://github.com/TheAlgorithms/Python/blob/master/hashes/sha256.py) ## Knapsack * [Greedy Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/greedy_knapsack.py) * [Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/knapsack.py) * Tests * [Test Greedy Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/tests/test_greedy_knapsack.py) * [Test Knapsack](https://github.com/TheAlgorithms/Python/blob/master/knapsack/tests/test_knapsack.py) ## Linear Algebra * Src * [Conjugate Gradient](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/conjugate_gradient.py) * [Lib](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/lib.py) * [Polynom For Points](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/polynom_for_points.py) * [Power Iteration](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/power_iteration.py) * [Rayleigh Quotient](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/rayleigh_quotient.py) * [Schur Complement](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/schur_complement.py) * [Test Linear Algebra](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/test_linear_algebra.py) * [Transformations 2D](https://github.com/TheAlgorithms/Python/blob/master/linear_algebra/src/transformations_2d.py) ## Machine Learning * [Astar](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/astar.py) * [Data Transformations](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/data_transformations.py) * [Decision Tree](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/decision_tree.py) * Forecasting * [Run](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/forecasting/run.py) * [Gaussian Naive Bayes](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gaussian_naive_bayes.py) * [Gradient Boosting Regressor](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gradient_boosting_regressor.py) * [Gradient Descent](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/gradient_descent.py) * [K Means Clust](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/k_means_clust.py) * [K Nearest Neighbours](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/k_nearest_neighbours.py) * [Knn Sklearn](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/knn_sklearn.py) * [Linear Discriminant Analysis](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_discriminant_analysis.py) * [Linear Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/linear_regression.py) * Local Weighted Learning * [Local Weighted Learning](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/local_weighted_learning/local_weighted_learning.py) * [Logistic Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/logistic_regression.py) * Lstm * [Lstm Prediction](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/lstm/lstm_prediction.py) * [Multilayer Perceptron Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/multilayer_perceptron_classifier.py) * [Polymonial Regression](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/polymonial_regression.py) * [Random Forest Classifier](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/random_forest_classifier.py) * [Random Forest Regressor](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/random_forest_regressor.py) * [Scoring Functions](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/scoring_functions.py) * [Sequential Minimum Optimization](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/sequential_minimum_optimization.py) * [Similarity Search](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/similarity_search.py) * [Support Vector Machines](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/support_vector_machines.py) * [Word Frequency Functions](https://github.com/TheAlgorithms/Python/blob/master/machine_learning/word_frequency_functions.py) ## Maths * [3N Plus 1](https://github.com/TheAlgorithms/Python/blob/master/maths/3n_plus_1.py) * [Abs](https://github.com/TheAlgorithms/Python/blob/master/maths/abs.py) * [Abs Max](https://github.com/TheAlgorithms/Python/blob/master/maths/abs_max.py) * [Abs Min](https://github.com/TheAlgorithms/Python/blob/master/maths/abs_min.py) * [Add](https://github.com/TheAlgorithms/Python/blob/master/maths/add.py) * [Aliquot Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/aliquot_sum.py) * [Allocation Number](https://github.com/TheAlgorithms/Python/blob/master/maths/allocation_number.py) * [Area](https://github.com/TheAlgorithms/Python/blob/master/maths/area.py) * [Area Under Curve](https://github.com/TheAlgorithms/Python/blob/master/maths/area_under_curve.py) * [Armstrong Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/armstrong_numbers.py) * [Average Mean](https://github.com/TheAlgorithms/Python/blob/master/maths/average_mean.py) * [Average Median](https://github.com/TheAlgorithms/Python/blob/master/maths/average_median.py) * [Average Mode](https://github.com/TheAlgorithms/Python/blob/master/maths/average_mode.py) * [Bailey Borwein Plouffe](https://github.com/TheAlgorithms/Python/blob/master/maths/bailey_borwein_plouffe.py) * [Basic Maths](https://github.com/TheAlgorithms/Python/blob/master/maths/basic_maths.py) * [Binary Exp Mod](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exp_mod.py) * [Binary Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation.py) * [Binary Exponentiation 2](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation_2.py) * [Binary Exponentiation 3](https://github.com/TheAlgorithms/Python/blob/master/maths/binary_exponentiation_3.py) * [Binomial Coefficient](https://github.com/TheAlgorithms/Python/blob/master/maths/binomial_coefficient.py) * [Binomial Distribution](https://github.com/TheAlgorithms/Python/blob/master/maths/binomial_distribution.py) * [Bisection](https://github.com/TheAlgorithms/Python/blob/master/maths/bisection.py) * [Ceil](https://github.com/TheAlgorithms/Python/blob/master/maths/ceil.py) * [Check Polygon](https://github.com/TheAlgorithms/Python/blob/master/maths/check_polygon.py) * [Chudnovsky Algorithm](https://github.com/TheAlgorithms/Python/blob/master/maths/chudnovsky_algorithm.py) * [Collatz Sequence](https://github.com/TheAlgorithms/Python/blob/master/maths/collatz_sequence.py) * [Combinations](https://github.com/TheAlgorithms/Python/blob/master/maths/combinations.py) * [Decimal Isolate](https://github.com/TheAlgorithms/Python/blob/master/maths/decimal_isolate.py) * [Double Factorial Iterative](https://github.com/TheAlgorithms/Python/blob/master/maths/double_factorial_iterative.py) * [Double Factorial Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/double_factorial_recursive.py) * [Entropy](https://github.com/TheAlgorithms/Python/blob/master/maths/entropy.py) * [Euclidean Distance](https://github.com/TheAlgorithms/Python/blob/master/maths/euclidean_distance.py) * [Euclidean Gcd](https://github.com/TheAlgorithms/Python/blob/master/maths/euclidean_gcd.py) * [Euler Method](https://github.com/TheAlgorithms/Python/blob/master/maths/euler_method.py) * [Euler Modified](https://github.com/TheAlgorithms/Python/blob/master/maths/euler_modified.py) * [Eulers Totient](https://github.com/TheAlgorithms/Python/blob/master/maths/eulers_totient.py) * [Extended Euclidean Algorithm](https://github.com/TheAlgorithms/Python/blob/master/maths/extended_euclidean_algorithm.py) * [Factorial Iterative](https://github.com/TheAlgorithms/Python/blob/master/maths/factorial_iterative.py) * [Factorial Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/factorial_recursive.py) * [Factors](https://github.com/TheAlgorithms/Python/blob/master/maths/factors.py) * [Fermat Little Theorem](https://github.com/TheAlgorithms/Python/blob/master/maths/fermat_little_theorem.py) * [Fibonacci](https://github.com/TheAlgorithms/Python/blob/master/maths/fibonacci.py) * [Find Max](https://github.com/TheAlgorithms/Python/blob/master/maths/find_max.py) * [Find Max Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/find_max_recursion.py) * [Find Min](https://github.com/TheAlgorithms/Python/blob/master/maths/find_min.py) * [Find Min Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/find_min_recursion.py) * [Floor](https://github.com/TheAlgorithms/Python/blob/master/maths/floor.py) * [Gamma](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma.py) * [Gamma Recursive](https://github.com/TheAlgorithms/Python/blob/master/maths/gamma_recursive.py) * [Gaussian](https://github.com/TheAlgorithms/Python/blob/master/maths/gaussian.py) * [Greatest Common Divisor](https://github.com/TheAlgorithms/Python/blob/master/maths/greatest_common_divisor.py) * [Greedy Coin Change](https://github.com/TheAlgorithms/Python/blob/master/maths/greedy_coin_change.py) * [Hardy Ramanujanalgo](https://github.com/TheAlgorithms/Python/blob/master/maths/hardy_ramanujanalgo.py) * [Integration By Simpson Approx](https://github.com/TheAlgorithms/Python/blob/master/maths/integration_by_simpson_approx.py) * [Is Ip V4 Address Valid](https://github.com/TheAlgorithms/Python/blob/master/maths/is_ip_v4_address_valid.py) * [Is Square Free](https://github.com/TheAlgorithms/Python/blob/master/maths/is_square_free.py) * [Jaccard Similarity](https://github.com/TheAlgorithms/Python/blob/master/maths/jaccard_similarity.py) * [Kadanes](https://github.com/TheAlgorithms/Python/blob/master/maths/kadanes.py) * [Karatsuba](https://github.com/TheAlgorithms/Python/blob/master/maths/karatsuba.py) * [Krishnamurthy Number](https://github.com/TheAlgorithms/Python/blob/master/maths/krishnamurthy_number.py) * [Kth Lexicographic Permutation](https://github.com/TheAlgorithms/Python/blob/master/maths/kth_lexicographic_permutation.py) * [Largest Of Very Large Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/largest_of_very_large_numbers.py) * [Largest Subarray Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/largest_subarray_sum.py) * [Least Common Multiple](https://github.com/TheAlgorithms/Python/blob/master/maths/least_common_multiple.py) * [Line Length](https://github.com/TheAlgorithms/Python/blob/master/maths/line_length.py) * [Lucas Lehmer Primality Test](https://github.com/TheAlgorithms/Python/blob/master/maths/lucas_lehmer_primality_test.py) * [Lucas Series](https://github.com/TheAlgorithms/Python/blob/master/maths/lucas_series.py) * [Matrix Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/maths/matrix_exponentiation.py) * [Max Sum Sliding Window](https://github.com/TheAlgorithms/Python/blob/master/maths/max_sum_sliding_window.py) * [Median Of Two Arrays](https://github.com/TheAlgorithms/Python/blob/master/maths/median_of_two_arrays.py) * [Miller Rabin](https://github.com/TheAlgorithms/Python/blob/master/maths/miller_rabin.py) * [Mobius Function](https://github.com/TheAlgorithms/Python/blob/master/maths/mobius_function.py) * [Modular Exponential](https://github.com/TheAlgorithms/Python/blob/master/maths/modular_exponential.py) * [Monte Carlo](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo.py) * [Monte Carlo Dice](https://github.com/TheAlgorithms/Python/blob/master/maths/monte_carlo_dice.py) * [Nevilles Method](https://github.com/TheAlgorithms/Python/blob/master/maths/nevilles_method.py) * [Newton Raphson](https://github.com/TheAlgorithms/Python/blob/master/maths/newton_raphson.py) * [Number Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/number_of_digits.py) * [Numerical Integration](https://github.com/TheAlgorithms/Python/blob/master/maths/numerical_integration.py) * [Perfect Cube](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_cube.py) * [Perfect Number](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_number.py) * [Perfect Square](https://github.com/TheAlgorithms/Python/blob/master/maths/perfect_square.py) * [Pi Monte Carlo Estimation](https://github.com/TheAlgorithms/Python/blob/master/maths/pi_monte_carlo_estimation.py) * [Pollard Rho](https://github.com/TheAlgorithms/Python/blob/master/maths/pollard_rho.py) * [Polynomial Evaluation](https://github.com/TheAlgorithms/Python/blob/master/maths/polynomial_evaluation.py) * [Power Using Recursion](https://github.com/TheAlgorithms/Python/blob/master/maths/power_using_recursion.py) * [Prime Check](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_check.py) * [Prime Factors](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_factors.py) * [Prime Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_numbers.py) * [Prime Sieve Eratosthenes](https://github.com/TheAlgorithms/Python/blob/master/maths/prime_sieve_eratosthenes.py) * [Primelib](https://github.com/TheAlgorithms/Python/blob/master/maths/primelib.py) * [Proth Number](https://github.com/TheAlgorithms/Python/blob/master/maths/proth_number.py) * [Pythagoras](https://github.com/TheAlgorithms/Python/blob/master/maths/pythagoras.py) * [Qr Decomposition](https://github.com/TheAlgorithms/Python/blob/master/maths/qr_decomposition.py) * [Quadratic Equations Complex Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/quadratic_equations_complex_numbers.py) * [Radians](https://github.com/TheAlgorithms/Python/blob/master/maths/radians.py) * [Radix2 Fft](https://github.com/TheAlgorithms/Python/blob/master/maths/radix2_fft.py) * [Relu](https://github.com/TheAlgorithms/Python/blob/master/maths/relu.py) * [Runge Kutta](https://github.com/TheAlgorithms/Python/blob/master/maths/runge_kutta.py) * [Segmented Sieve](https://github.com/TheAlgorithms/Python/blob/master/maths/segmented_sieve.py) * Series * [Arithmetic](https://github.com/TheAlgorithms/Python/blob/master/maths/series/arithmetic.py) * [Geometric](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric.py) * [Geometric Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/geometric_series.py) * [Harmonic](https://github.com/TheAlgorithms/Python/blob/master/maths/series/harmonic.py) * [Harmonic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/harmonic_series.py) * [Hexagonal Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/series/hexagonal_numbers.py) * [P Series](https://github.com/TheAlgorithms/Python/blob/master/maths/series/p_series.py) * [Sieve Of Eratosthenes](https://github.com/TheAlgorithms/Python/blob/master/maths/sieve_of_eratosthenes.py) * [Sigmoid](https://github.com/TheAlgorithms/Python/blob/master/maths/sigmoid.py) * [Simpson Rule](https://github.com/TheAlgorithms/Python/blob/master/maths/simpson_rule.py) * [Sock Merchant](https://github.com/TheAlgorithms/Python/blob/master/maths/sock_merchant.py) * [Softmax](https://github.com/TheAlgorithms/Python/blob/master/maths/softmax.py) * [Square Root](https://github.com/TheAlgorithms/Python/blob/master/maths/square_root.py) * [Sum Of Arithmetic Series](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_arithmetic_series.py) * [Sum Of Digits](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_digits.py) * [Sum Of Geometric Progression](https://github.com/TheAlgorithms/Python/blob/master/maths/sum_of_geometric_progression.py) * [Sylvester Sequence](https://github.com/TheAlgorithms/Python/blob/master/maths/sylvester_sequence.py) * [Test Prime Check](https://github.com/TheAlgorithms/Python/blob/master/maths/test_prime_check.py) * [Trapezoidal Rule](https://github.com/TheAlgorithms/Python/blob/master/maths/trapezoidal_rule.py) * [Triplet Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/triplet_sum.py) * [Two Pointer](https://github.com/TheAlgorithms/Python/blob/master/maths/two_pointer.py) * [Two Sum](https://github.com/TheAlgorithms/Python/blob/master/maths/two_sum.py) * [Ugly Numbers](https://github.com/TheAlgorithms/Python/blob/master/maths/ugly_numbers.py) * [Volume](https://github.com/TheAlgorithms/Python/blob/master/maths/volume.py) * [Zellers Congruence](https://github.com/TheAlgorithms/Python/blob/master/maths/zellers_congruence.py) ## Matrix * [Count Islands In Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/count_islands_in_matrix.py) * [Inverse Of Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/inverse_of_matrix.py) * [Matrix Class](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_class.py) * [Matrix Operation](https://github.com/TheAlgorithms/Python/blob/master/matrix/matrix_operation.py) * [Nth Fibonacci Using Matrix Exponentiation](https://github.com/TheAlgorithms/Python/blob/master/matrix/nth_fibonacci_using_matrix_exponentiation.py) * [Rotate Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/rotate_matrix.py) * [Searching In Sorted Matrix](https://github.com/TheAlgorithms/Python/blob/master/matrix/searching_in_sorted_matrix.py) * [Sherman Morrison](https://github.com/TheAlgorithms/Python/blob/master/matrix/sherman_morrison.py) * [Spiral Print](https://github.com/TheAlgorithms/Python/blob/master/matrix/spiral_print.py) * Tests * [Test Matrix Operation](https://github.com/TheAlgorithms/Python/blob/master/matrix/tests/test_matrix_operation.py) ## Networking Flow * [Ford Fulkerson](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/ford_fulkerson.py) * [Minimum Cut](https://github.com/TheAlgorithms/Python/blob/master/networking_flow/minimum_cut.py) ## Neural Network * [2 Hidden Layers Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/2_hidden_layers_neural_network.py) * [Back Propagation Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/back_propagation_neural_network.py) * [Convolution Neural Network](https://github.com/TheAlgorithms/Python/blob/master/neural_network/convolution_neural_network.py) * [Perceptron](https://github.com/TheAlgorithms/Python/blob/master/neural_network/perceptron.py) ## Other * [Activity Selection](https://github.com/TheAlgorithms/Python/blob/master/other/activity_selection.py) * [Alternative List Arrange](https://github.com/TheAlgorithms/Python/blob/master/other/alternative_list_arrange.py) * [Check Strong Password](https://github.com/TheAlgorithms/Python/blob/master/other/check_strong_password.py) * [Davisb Putnamb Logemannb Loveland](https://github.com/TheAlgorithms/Python/blob/master/other/davisb_putnamb_logemannb_loveland.py) * [Dijkstra Bankers Algorithm](https://github.com/TheAlgorithms/Python/blob/master/other/dijkstra_bankers_algorithm.py) * [Doomsday](https://github.com/TheAlgorithms/Python/blob/master/other/doomsday.py) * [Fischer Yates Shuffle](https://github.com/TheAlgorithms/Python/blob/master/other/fischer_yates_shuffle.py) * [Gauss Easter](https://github.com/TheAlgorithms/Python/blob/master/other/gauss_easter.py) * [Graham Scan](https://github.com/TheAlgorithms/Python/blob/master/other/graham_scan.py) * [Greedy](https://github.com/TheAlgorithms/Python/blob/master/other/greedy.py) * [Least Recently Used](https://github.com/TheAlgorithms/Python/blob/master/other/least_recently_used.py) * [Lfu Cache](https://github.com/TheAlgorithms/Python/blob/master/other/lfu_cache.py) * [Linear Congruential Generator](https://github.com/TheAlgorithms/Python/blob/master/other/linear_congruential_generator.py) * [Lru Cache](https://github.com/TheAlgorithms/Python/blob/master/other/lru_cache.py) * [Magicdiamondpattern](https://github.com/TheAlgorithms/Python/blob/master/other/magicdiamondpattern.py) * [Nested Brackets](https://github.com/TheAlgorithms/Python/blob/master/other/nested_brackets.py) * [Password Generator](https://github.com/TheAlgorithms/Python/blob/master/other/password_generator.py) * [Scoring Algorithm](https://github.com/TheAlgorithms/Python/blob/master/other/scoring_algorithm.py) * [Sdes](https://github.com/TheAlgorithms/Python/blob/master/other/sdes.py) * [Tower Of Hanoi](https://github.com/TheAlgorithms/Python/blob/master/other/tower_of_hanoi.py) ## Physics * [N Body Simulation](https://github.com/TheAlgorithms/Python/blob/master/physics/n_body_simulation.py) * [Newtons Second Law Of Motion](https://github.com/TheAlgorithms/Python/blob/master/physics/newtons_second_law_of_motion.py) ## Project Euler * Problem 001 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol4.py) * [Sol5](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol5.py) * [Sol6](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol6.py) * [Sol7](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_001/sol7.py) * Problem 002 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol4.py) * [Sol5](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_002/sol5.py) * Problem 003 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_003/sol3.py) * Problem 004 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_004/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_004/sol2.py) * Problem 005 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_005/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_005/sol2.py) * Problem 006 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_006/sol4.py) * Problem 007 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_007/sol3.py) * Problem 008 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_008/sol3.py) * Problem 009 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_009/sol3.py) * Problem 010 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_010/sol3.py) * Problem 011 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_011/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_011/sol2.py) * Problem 012 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_012/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_012/sol2.py) * Problem 013 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_013/sol1.py) * Problem 014 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_014/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_014/sol2.py) * Problem 015 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_015/sol1.py) * Problem 016 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_016/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_016/sol2.py) * Problem 017 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_017/sol1.py) * Problem 018 * [Solution](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_018/solution.py) * Problem 019 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_019/sol1.py) * Problem 020 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol3.py) * [Sol4](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_020/sol4.py) * Problem 021 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_021/sol1.py) * Problem 022 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_022/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_022/sol2.py) * Problem 023 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_023/sol1.py) * Problem 024 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_024/sol1.py) * Problem 025 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol2.py) * [Sol3](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_025/sol3.py) * Problem 026 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_026/sol1.py) * Problem 027 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_027/sol1.py) * Problem 028 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_028/sol1.py) * Problem 029 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_029/sol1.py) * Problem 030 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_030/sol1.py) * Problem 031 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_031/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_031/sol2.py) * Problem 032 * [Sol32](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_032/sol32.py) * Problem 033 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_033/sol1.py) * Problem 034 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_034/sol1.py) * Problem 035 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_035/sol1.py) * Problem 036 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_036/sol1.py) * Problem 037 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_037/sol1.py) * Problem 038 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_038/sol1.py) * Problem 039 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_039/sol1.py) * Problem 040 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_040/sol1.py) * Problem 041 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_041/sol1.py) * Problem 042 * [Solution42](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_042/solution42.py) * Problem 043 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_043/sol1.py) * Problem 044 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_044/sol1.py) * Problem 045 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_045/sol1.py) * Problem 046 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_046/sol1.py) * Problem 047 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_047/sol1.py) * Problem 048 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_048/sol1.py) * Problem 049 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_049/sol1.py) * Problem 050 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_050/sol1.py) * Problem 051 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_051/sol1.py) * Problem 052 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_052/sol1.py) * Problem 053 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_053/sol1.py) * Problem 054 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_054/sol1.py) * [Test Poker Hand](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_054/test_poker_hand.py) * Problem 055 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_055/sol1.py) * Problem 056 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_056/sol1.py) * Problem 057 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_057/sol1.py) * Problem 058 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_058/sol1.py) * Problem 059 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_059/sol1.py) * Problem 062 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_062/sol1.py) * Problem 063 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_063/sol1.py) * Problem 064 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_064/sol1.py) * Problem 065 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_065/sol1.py) * Problem 067 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_067/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_067/sol2.py) * Problem 069 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_069/sol1.py) * Problem 070 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_070/sol1.py) * Problem 071 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_071/sol1.py) * Problem 072 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_072/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_072/sol2.py) * Problem 074 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_074/sol1.py) * [Sol2](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_074/sol2.py) * Problem 075 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_075/sol1.py) * Problem 076 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_076/sol1.py) * Problem 077 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_077/sol1.py) * Problem 078 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_078/sol1.py) * Problem 080 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_080/sol1.py) * Problem 081 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_081/sol1.py) * Problem 085 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_085/sol1.py) * Problem 086 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_086/sol1.py) * Problem 087 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_087/sol1.py) * Problem 089 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_089/sol1.py) * Problem 091 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_091/sol1.py) * Problem 092 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_092/sol1.py) * Problem 097 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_097/sol1.py) * Problem 099 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_099/sol1.py) * Problem 101 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_101/sol1.py) * Problem 102 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_102/sol1.py) * Problem 107 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_107/sol1.py) * Problem 109 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_109/sol1.py) * Problem 112 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_112/sol1.py) * Problem 113 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_113/sol1.py) * Problem 119 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_119/sol1.py) * Problem 120 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_120/sol1.py) * Problem 121 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_121/sol1.py) * Problem 123 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_123/sol1.py) * Problem 125 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_125/sol1.py) * Problem 129 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_129/sol1.py) * Problem 135 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_135/sol1.py) * Problem 144 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_144/sol1.py) * Problem 145 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_145/sol1.py) * Problem 173 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_173/sol1.py) * Problem 174 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_174/sol1.py) * Problem 180 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_180/sol1.py) * Problem 188 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_188/sol1.py) * Problem 191 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_191/sol1.py) * Problem 203 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_203/sol1.py) * Problem 205 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_205/sol1.py) * Problem 206 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_206/sol1.py) * Problem 207 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_207/sol1.py) * Problem 234 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_234/sol1.py) * Problem 301 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_301/sol1.py) * Problem 493 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_493/sol1.py) * Problem 551 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_551/sol1.py) * Problem 686 * [Sol1](https://github.com/TheAlgorithms/Python/blob/master/project_euler/problem_686/sol1.py) ## Quantum * [Deutsch Jozsa](https://github.com/TheAlgorithms/Python/blob/master/quantum/deutsch_jozsa.py) * [Half Adder](https://github.com/TheAlgorithms/Python/blob/master/quantum/half_adder.py) * [Not Gate](https://github.com/TheAlgorithms/Python/blob/master/quantum/not_gate.py) * [Quantum Entanglement](https://github.com/TheAlgorithms/Python/blob/master/quantum/quantum_entanglement.py) * [Ripple Adder Classic](https://github.com/TheAlgorithms/Python/blob/master/quantum/ripple_adder_classic.py) * [Single Qubit Measure](https://github.com/TheAlgorithms/Python/blob/master/quantum/single_qubit_measure.py) ## Scheduling * [First Come First Served](https://github.com/TheAlgorithms/Python/blob/master/scheduling/first_come_first_served.py) * [Round Robin](https://github.com/TheAlgorithms/Python/blob/master/scheduling/round_robin.py) * [Shortest Job First](https://github.com/TheAlgorithms/Python/blob/master/scheduling/shortest_job_first.py) ## Searches * [Binary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/binary_search.py) * [Binary Tree Traversal](https://github.com/TheAlgorithms/Python/blob/master/searches/binary_tree_traversal.py) * [Double Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/double_linear_search.py) * [Double Linear Search Recursion](https://github.com/TheAlgorithms/Python/blob/master/searches/double_linear_search_recursion.py) * [Fibonacci Search](https://github.com/TheAlgorithms/Python/blob/master/searches/fibonacci_search.py) * [Hill Climbing](https://github.com/TheAlgorithms/Python/blob/master/searches/hill_climbing.py) * [Interpolation Search](https://github.com/TheAlgorithms/Python/blob/master/searches/interpolation_search.py) * [Jump Search](https://github.com/TheAlgorithms/Python/blob/master/searches/jump_search.py) * [Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/linear_search.py) * [Quick Select](https://github.com/TheAlgorithms/Python/blob/master/searches/quick_select.py) * [Sentinel Linear Search](https://github.com/TheAlgorithms/Python/blob/master/searches/sentinel_linear_search.py) * [Simple Binary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/simple_binary_search.py) * [Simulated Annealing](https://github.com/TheAlgorithms/Python/blob/master/searches/simulated_annealing.py) * [Tabu Search](https://github.com/TheAlgorithms/Python/blob/master/searches/tabu_search.py) * [Ternary Search](https://github.com/TheAlgorithms/Python/blob/master/searches/ternary_search.py) ## Sorts * [Bead Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bead_sort.py) * [Bitonic Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bitonic_sort.py) * [Bogo Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bogo_sort.py) * [Bubble Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bubble_sort.py) * [Bucket Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/bucket_sort.py) * [Cocktail Shaker Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/cocktail_shaker_sort.py) * [Comb Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/comb_sort.py) * [Counting Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/counting_sort.py) * [Cycle Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/cycle_sort.py) * [Double Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/double_sort.py) * [Dutch National Flag Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/dutch_national_flag_sort.py) * [Exchange Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/exchange_sort.py) * [External Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/external_sort.py) * [Gnome Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/gnome_sort.py) * [Heap Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/heap_sort.py) * [Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/insertion_sort.py) * [Intro Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/intro_sort.py) * [Iterative Merge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/iterative_merge_sort.py) * [Merge Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/merge_insertion_sort.py) * [Merge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/merge_sort.py) * [Msd Radix Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/msd_radix_sort.py) * [Natural Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/natural_sort.py) * [Odd Even Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_sort.py) * [Odd Even Transposition Parallel](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_transposition_parallel.py) * [Odd Even Transposition Single Threaded](https://github.com/TheAlgorithms/Python/blob/master/sorts/odd_even_transposition_single_threaded.py) * [Pancake Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pancake_sort.py) * [Patience Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/patience_sort.py) * [Pigeon Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pigeon_sort.py) * [Pigeonhole Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/pigeonhole_sort.py) * [Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/quick_sort.py) * [Quick Sort 3 Partition](https://github.com/TheAlgorithms/Python/blob/master/sorts/quick_sort_3_partition.py) * [Radix Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/radix_sort.py) * [Random Normal Distribution Quicksort](https://github.com/TheAlgorithms/Python/blob/master/sorts/random_normal_distribution_quicksort.py) * [Random Pivot Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/random_pivot_quick_sort.py) * [Recursive Bubble Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_bubble_sort.py) * [Recursive Insertion Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_insertion_sort.py) * [Recursive Mergesort Array](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_mergesort_array.py) * [Recursive Quick Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/recursive_quick_sort.py) * [Selection Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/selection_sort.py) * [Shell Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/shell_sort.py) * [Slowsort](https://github.com/TheAlgorithms/Python/blob/master/sorts/slowsort.py) * [Stooge Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/stooge_sort.py) * [Strand Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/strand_sort.py) * [Tim Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/tim_sort.py) * [Topological Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/topological_sort.py) * [Tree Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/tree_sort.py) * [Unknown Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/unknown_sort.py) * [Wiggle Sort](https://github.com/TheAlgorithms/Python/blob/master/sorts/wiggle_sort.py) ## Strings * [Aho Corasick](https://github.com/TheAlgorithms/Python/blob/master/strings/aho_corasick.py) * [Alternative String Arrange](https://github.com/TheAlgorithms/Python/blob/master/strings/alternative_string_arrange.py) * [Anagrams](https://github.com/TheAlgorithms/Python/blob/master/strings/anagrams.py) * [Autocomplete Using Trie](https://github.com/TheAlgorithms/Python/blob/master/strings/autocomplete_using_trie.py) * [Boyer Moore Search](https://github.com/TheAlgorithms/Python/blob/master/strings/boyer_moore_search.py) * [Can String Be Rearranged As Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/can_string_be_rearranged_as_palindrome.py) * [Capitalize](https://github.com/TheAlgorithms/Python/blob/master/strings/capitalize.py) * [Check Anagrams](https://github.com/TheAlgorithms/Python/blob/master/strings/check_anagrams.py) * [Check Pangram](https://github.com/TheAlgorithms/Python/blob/master/strings/check_pangram.py) * [Credit Card Validator](https://github.com/TheAlgorithms/Python/blob/master/strings/credit_card_validator.py) * [Detecting English Programmatically](https://github.com/TheAlgorithms/Python/blob/master/strings/detecting_english_programmatically.py) * [Frequency Finder](https://github.com/TheAlgorithms/Python/blob/master/strings/frequency_finder.py) * [Indian Phone Validator](https://github.com/TheAlgorithms/Python/blob/master/strings/indian_phone_validator.py) * [Is Contains Unique Chars](https://github.com/TheAlgorithms/Python/blob/master/strings/is_contains_unique_chars.py) * [Is Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/is_palindrome.py) * [Jaro Winkler](https://github.com/TheAlgorithms/Python/blob/master/strings/jaro_winkler.py) * [Join](https://github.com/TheAlgorithms/Python/blob/master/strings/join.py) * [Knuth Morris Pratt](https://github.com/TheAlgorithms/Python/blob/master/strings/knuth_morris_pratt.py) * [Levenshtein Distance](https://github.com/TheAlgorithms/Python/blob/master/strings/levenshtein_distance.py) * [Lower](https://github.com/TheAlgorithms/Python/blob/master/strings/lower.py) * [Manacher](https://github.com/TheAlgorithms/Python/blob/master/strings/manacher.py) * [Min Cost String Conversion](https://github.com/TheAlgorithms/Python/blob/master/strings/min_cost_string_conversion.py) * [Naive String Search](https://github.com/TheAlgorithms/Python/blob/master/strings/naive_string_search.py) * [Palindrome](https://github.com/TheAlgorithms/Python/blob/master/strings/palindrome.py) * [Prefix Function](https://github.com/TheAlgorithms/Python/blob/master/strings/prefix_function.py) * [Rabin Karp](https://github.com/TheAlgorithms/Python/blob/master/strings/rabin_karp.py) * [Remove Duplicate](https://github.com/TheAlgorithms/Python/blob/master/strings/remove_duplicate.py) * [Reverse Letters](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_letters.py) * [Reverse Long Words](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_long_words.py) * [Reverse Words](https://github.com/TheAlgorithms/Python/blob/master/strings/reverse_words.py) * [Split](https://github.com/TheAlgorithms/Python/blob/master/strings/split.py) * [Upper](https://github.com/TheAlgorithms/Python/blob/master/strings/upper.py) * [Wildcard Pattern Matching](https://github.com/TheAlgorithms/Python/blob/master/strings/wildcard_pattern_matching.py) * [Word Occurrence](https://github.com/TheAlgorithms/Python/blob/master/strings/word_occurrence.py) * [Word Patterns](https://github.com/TheAlgorithms/Python/blob/master/strings/word_patterns.py) * [Z Function](https://github.com/TheAlgorithms/Python/blob/master/strings/z_function.py) ## Web Programming * [Co2 Emission](https://github.com/TheAlgorithms/Python/blob/master/web_programming/co2_emission.py) * [Covid Stats Via Xpath](https://github.com/TheAlgorithms/Python/blob/master/web_programming/covid_stats_via_xpath.py) * [Crawl Google Results](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_results.py) * [Crawl Google Scholar Citation](https://github.com/TheAlgorithms/Python/blob/master/web_programming/crawl_google_scholar_citation.py) * [Currency Converter](https://github.com/TheAlgorithms/Python/blob/master/web_programming/currency_converter.py) * [Current Stock Price](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_stock_price.py) * [Current Weather](https://github.com/TheAlgorithms/Python/blob/master/web_programming/current_weather.py) * [Daily Horoscope](https://github.com/TheAlgorithms/Python/blob/master/web_programming/daily_horoscope.py) * [Download Images From Google Query](https://github.com/TheAlgorithms/Python/blob/master/web_programming/download_images_from_google_query.py) * [Emails From Url](https://github.com/TheAlgorithms/Python/blob/master/web_programming/emails_from_url.py) * [Fetch Bbc News](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_bbc_news.py) * [Fetch Github Info](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_github_info.py) * [Fetch Jobs](https://github.com/TheAlgorithms/Python/blob/master/web_programming/fetch_jobs.py) * [Get Imdb Top 250 Movies Csv](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_imdb_top_250_movies_csv.py) * [Get Imdbtop](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_imdbtop.py) * [Get Top Hn Posts](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_top_hn_posts.py) * [Get User Tweets](https://github.com/TheAlgorithms/Python/blob/master/web_programming/get_user_tweets.py) * [Giphy](https://github.com/TheAlgorithms/Python/blob/master/web_programming/giphy.py) * [Instagram Crawler](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_crawler.py) * [Instagram Pic](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_pic.py) * [Instagram Video](https://github.com/TheAlgorithms/Python/blob/master/web_programming/instagram_video.py) * [Nasa Data](https://github.com/TheAlgorithms/Python/blob/master/web_programming/nasa_data.py) * [Random Anime Character](https://github.com/TheAlgorithms/Python/blob/master/web_programming/random_anime_character.py) * [Recaptcha Verification](https://github.com/TheAlgorithms/Python/blob/master/web_programming/recaptcha_verification.py) * [Reddit](https://github.com/TheAlgorithms/Python/blob/master/web_programming/reddit.py) * [Search Books By Isbn](https://github.com/TheAlgorithms/Python/blob/master/web_programming/search_books_by_isbn.py) * [Slack Message](https://github.com/TheAlgorithms/Python/blob/master/web_programming/slack_message.py) * [Test Fetch Github Info](https://github.com/TheAlgorithms/Python/blob/master/web_programming/test_fetch_github_info.py) * [World Covid19 Stats](https://github.com/TheAlgorithms/Python/blob/master/web_programming/world_covid19_stats.py)
1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Functions for 2D matrix operations """ from __future__ import annotations def add(*matrix_s: list[list]) -> list[list]: """ >>> add([[1,2],[3,4]],[[2,3],[4,5]]) [[3, 5], [7, 9]] >>> add([[1.2,2.4],[3,4]],[[2,3],[4,5]]) [[3.2, 5.4], [7, 9]] >>> add([[1, 2], [4, 5]], [[3, 7], [3, 4]], [[3, 5], [5, 7]]) [[7, 14], [12, 16]] """ if all(_check_not_integer(m) for m in matrix_s): for i in matrix_s[1:]: _verify_matrix_sizes(matrix_s[0], i) return [[sum(t) for t in zip(*m)] for m in zip(*matrix_s)] def subtract(matrix_a: list[list], matrix_b: list[list]) -> list[list]: """ >>> subtract([[1,2],[3,4]],[[2,3],[4,5]]) [[-1, -1], [-1, -1]] >>> subtract([[1,2.5],[3,4]],[[2,3],[4,5.5]]) [[-1, -0.5], [-1, -1.5]] """ if ( _check_not_integer(matrix_a) and _check_not_integer(matrix_b) and _verify_matrix_sizes(matrix_a, matrix_b) ): return [[i - j for i, j in zip(*m)] for m in zip(matrix_a, matrix_b)] def scalar_multiply(matrix: list[list], n: int) -> list[list]: """ >>> scalar_multiply([[1,2],[3,4]],5) [[5, 10], [15, 20]] >>> scalar_multiply([[1.4,2.3],[3,4]],5) [[7.0, 11.5], [15, 20]] """ return [[x * n for x in row] for row in matrix] def multiply(matrix_a: list[list], matrix_b: list[list]) -> list[list]: """ >>> multiply([[1,2],[3,4]],[[5,5],[7,5]]) [[19, 15], [43, 35]] >>> multiply([[1,2.5],[3,4.5]],[[5,5],[7,5]]) [[22.5, 17.5], [46.5, 37.5]] >>> multiply([[1, 2, 3]], [[2], [3], [4]]) [[20]] """ if _check_not_integer(matrix_a) and _check_not_integer(matrix_b): rows, cols = _verify_matrix_sizes(matrix_a, matrix_b) if cols[0] != rows[1]: raise ValueError( f"Cannot multiply matrix of dimensions ({rows[0]},{cols[0]}) " f"and ({rows[1]},{cols[1]})" ) return [ [sum(m * n for m, n in zip(i, j)) for j in zip(*matrix_b)] for i in matrix_a ] def identity(n: int) -> list[list]: """ :param n: dimension for nxn matrix :type n: int :return: Identity matrix of shape [n, n] >>> identity(3) [[1, 0, 0], [0, 1, 0], [0, 0, 1]] """ n = int(n) return [[int(row == column) for column in range(n)] for row in range(n)] def transpose(matrix: list[list], return_map: bool = True) -> list[list]: """ >>> transpose([[1,2],[3,4]]) # doctest: +ELLIPSIS <map object at ... >>> transpose([[1,2],[3,4]], return_map=False) [[1, 3], [2, 4]] """ if _check_not_integer(matrix): if return_map: return map(list, zip(*matrix)) else: return list(map(list, zip(*matrix))) def minor(matrix: list[list], row: int, column: int) -> list[list]: """ >>> minor([[1, 2], [3, 4]], 1, 1) [[1]] """ minor = matrix[:row] + matrix[row + 1 :] return [row[:column] + row[column + 1 :] for row in minor] def determinant(matrix: list[list]) -> int: """ >>> determinant([[1, 2], [3, 4]]) -2 >>> determinant([[1.5, 2.5], [3, 4]]) -1.5 """ if len(matrix) == 1: return matrix[0][0] return sum( x * determinant(minor(matrix, 0, i)) * (-1) ** i for i, x in enumerate(matrix[0]) ) def inverse(matrix: list[list]) -> list[list]: """ >>> inverse([[1, 2], [3, 4]]) [[-2.0, 1.0], [1.5, -0.5]] >>> inverse([[1, 1], [1, 1]]) """ # https://stackoverflow.com/questions/20047519/python-doctests-test-for-none det = determinant(matrix) if det == 0: return None matrix_minor = [ [determinant(minor(matrix, i, j)) for j in range(len(matrix))] for i in range(len(matrix)) ] cofactors = [ [x * (-1) ** (row + col) for col, x in enumerate(matrix_minor[row])] for row in range(len(matrix)) ] adjugate = transpose(cofactors) return scalar_multiply(adjugate, 1 / det) def _check_not_integer(matrix: list[list]) -> bool: if not isinstance(matrix, int) and not isinstance(matrix[0], int): return True raise TypeError("Expected a matrix, got int/list instead") def _shape(matrix: list[list]) -> list: return len(matrix), len(matrix[0]) def _verify_matrix_sizes(matrix_a: list[list], matrix_b: list[list]) -> tuple[list]: shape = _shape(matrix_a) + _shape(matrix_b) if shape[0] != shape[3] or shape[1] != shape[2]: raise ValueError( f"operands could not be broadcast together with shape " f"({shape[0], shape[1]}), ({shape[2], shape[3]})" ) return (shape[0], shape[2]), (shape[1], shape[3]) def main(): matrix_a = [[12, 10], [3, 9]] matrix_b = [[3, 4], [7, 4]] matrix_c = [[11, 12, 13, 14], [21, 22, 23, 24], [31, 32, 33, 34], [41, 42, 43, 44]] matrix_d = [[3, 0, 2], [2, 0, -2], [0, 1, 1]] print(f"Add Operation, {add(matrix_a, matrix_b) = } \n") print( f"Multiply Operation, {multiply(matrix_a, matrix_b) = } \n", ) print(f"Identity: {identity(5)}\n") print(f"Minor of {matrix_c} = {minor(matrix_c, 1, 2)} \n") print(f"Determinant of {matrix_b} = {determinant(matrix_b)} \n") print(f"Inverse of {matrix_d} = {inverse(matrix_d)}\n") if __name__ == "__main__": import doctest doctest.testmod() main()
""" Functions for 2D matrix operations """ from __future__ import annotations def add(*matrix_s: list[list]) -> list[list]: """ >>> add([[1,2],[3,4]],[[2,3],[4,5]]) [[3, 5], [7, 9]] >>> add([[1.2,2.4],[3,4]],[[2,3],[4,5]]) [[3.2, 5.4], [7, 9]] >>> add([[1, 2], [4, 5]], [[3, 7], [3, 4]], [[3, 5], [5, 7]]) [[7, 14], [12, 16]] >>> add([3], [4, 5]) Traceback (most recent call last): ... TypeError: Expected a matrix, got int/list instead """ if all(_check_not_integer(m) for m in matrix_s): for i in matrix_s[1:]: _verify_matrix_sizes(matrix_s[0], i) return [[sum(t) for t in zip(*m)] for m in zip(*matrix_s)] raise TypeError("Expected a matrix, got int/list instead") def subtract(matrix_a: list[list], matrix_b: list[list]) -> list[list]: """ >>> subtract([[1,2],[3,4]],[[2,3],[4,5]]) [[-1, -1], [-1, -1]] >>> subtract([[1,2.5],[3,4]],[[2,3],[4,5.5]]) [[-1, -0.5], [-1, -1.5]] >>> subtract([3], [4, 5]) Traceback (most recent call last): ... TypeError: Expected a matrix, got int/list instead """ if ( _check_not_integer(matrix_a) and _check_not_integer(matrix_b) and _verify_matrix_sizes(matrix_a, matrix_b) ): return [[i - j for i, j in zip(*m)] for m in zip(matrix_a, matrix_b)] raise TypeError("Expected a matrix, got int/list instead") def scalar_multiply(matrix: list[list], n: int | float) -> list[list]: """ >>> scalar_multiply([[1,2],[3,4]],5) [[5, 10], [15, 20]] >>> scalar_multiply([[1.4,2.3],[3,4]],5) [[7.0, 11.5], [15, 20]] """ return [[x * n for x in row] for row in matrix] def multiply(matrix_a: list[list], matrix_b: list[list]) -> list[list]: """ >>> multiply([[1,2],[3,4]],[[5,5],[7,5]]) [[19, 15], [43, 35]] >>> multiply([[1,2.5],[3,4.5]],[[5,5],[7,5]]) [[22.5, 17.5], [46.5, 37.5]] >>> multiply([[1, 2, 3]], [[2], [3], [4]]) [[20]] """ if _check_not_integer(matrix_a) and _check_not_integer(matrix_b): rows, cols = _verify_matrix_sizes(matrix_a, matrix_b) if cols[0] != rows[1]: raise ValueError( f"Cannot multiply matrix of dimensions ({rows[0]},{cols[0]}) " f"and ({rows[1]},{cols[1]})" ) return [ [sum(m * n for m, n in zip(i, j)) for j in zip(*matrix_b)] for i in matrix_a ] def identity(n: int) -> list[list]: """ :param n: dimension for nxn matrix :type n: int :return: Identity matrix of shape [n, n] >>> identity(3) [[1, 0, 0], [0, 1, 0], [0, 0, 1]] """ n = int(n) return [[int(row == column) for column in range(n)] for row in range(n)] def transpose(matrix: list[list], return_map: bool = True) -> list[list] | map[list]: """ >>> transpose([[1,2],[3,4]]) # doctest: +ELLIPSIS <map object at ... >>> transpose([[1,2],[3,4]], return_map=False) [[1, 3], [2, 4]] >>> transpose([1, [2, 3]]) Traceback (most recent call last): ... TypeError: Expected a matrix, got int/list instead """ if _check_not_integer(matrix): if return_map: return map(list, zip(*matrix)) else: return list(map(list, zip(*matrix))) raise TypeError("Expected a matrix, got int/list instead") def minor(matrix: list[list], row: int, column: int) -> list[list]: """ >>> minor([[1, 2], [3, 4]], 1, 1) [[1]] """ minor = matrix[:row] + matrix[row + 1 :] return [row[:column] + row[column + 1 :] for row in minor] def determinant(matrix: list[list]) -> int: """ >>> determinant([[1, 2], [3, 4]]) -2 >>> determinant([[1.5, 2.5], [3, 4]]) -1.5 """ if len(matrix) == 1: return matrix[0][0] return sum( x * determinant(minor(matrix, 0, i)) * (-1) ** i for i, x in enumerate(matrix[0]) ) def inverse(matrix: list[list]) -> list[list] | None: """ >>> inverse([[1, 2], [3, 4]]) [[-2.0, 1.0], [1.5, -0.5]] >>> inverse([[1, 1], [1, 1]]) """ # https://stackoverflow.com/questions/20047519/python-doctests-test-for-none det = determinant(matrix) if det == 0: return None matrix_minor = [ [determinant(minor(matrix, i, j)) for j in range(len(matrix))] for i in range(len(matrix)) ] cofactors = [ [x * (-1) ** (row + col) for col, x in enumerate(matrix_minor[row])] for row in range(len(matrix)) ] adjugate = list(transpose(cofactors)) return scalar_multiply(adjugate, 1 / det) def _check_not_integer(matrix: list[list]) -> bool: return not isinstance(matrix, int) and not isinstance(matrix[0], int) def _shape(matrix: list[list]) -> tuple[int, int]: return len(matrix), len(matrix[0]) def _verify_matrix_sizes( matrix_a: list[list], matrix_b: list[list] ) -> tuple[tuple, tuple]: shape = _shape(matrix_a) + _shape(matrix_b) if shape[0] != shape[3] or shape[1] != shape[2]: raise ValueError( f"operands could not be broadcast together with shape " f"({shape[0], shape[1]}), ({shape[2], shape[3]})" ) return (shape[0], shape[2]), (shape[1], shape[3]) def main(): matrix_a = [[12, 10], [3, 9]] matrix_b = [[3, 4], [7, 4]] matrix_c = [[11, 12, 13, 14], [21, 22, 23, 24], [31, 32, 33, 34], [41, 42, 43, 44]] matrix_d = [[3, 0, 2], [2, 0, -2], [0, 1, 1]] print(f"Add Operation, {add(matrix_a, matrix_b) = } \n") print( f"Multiply Operation, {multiply(matrix_a, matrix_b) = } \n", ) print(f"Identity: {identity(5)}\n") print(f"Minor of {matrix_c} = {minor(matrix_c, 1, 2)} \n") print(f"Determinant of {matrix_b} = {determinant(matrix_b)} \n") print(f"Inverse of {matrix_d} = {inverse(matrix_d)}\n") if __name__ == "__main__": import doctest doctest.testmod() main()
1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
[mypy] ignore_missing_imports = True install_types = True non_interactive = True exclude = (matrix_operation.py|other/least_recently_used.py|other/lfu_cache.py|other/lru_cache.py)
[mypy] ignore_missing_imports = True install_types = True non_interactive = True exclude = (other/least_recently_used.py|other/lfu_cache.py|other/lru_cache.py)
1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/usr/bin/env python3 def climb_stairs(n: int) -> int: """ LeetCdoe No.70: Climbing Stairs Distinct ways to climb a n step staircase where each time you can either climb 1 or 2 steps. Args: n: number of steps of staircase Returns: Distinct ways to climb a n step staircase Raises: AssertionError: n not positive integer >>> climb_stairs(3) 3 >>> climb_stairs(1) 1 >>> climb_stairs(-7) # doctest: +ELLIPSIS Traceback (most recent call last): ... AssertionError: n needs to be positive integer, your input -7 """ assert ( isinstance(n, int) and n > 0 ), f"n needs to be positive integer, your input {n}" if n == 1: return 1 dp = [0] * (n + 1) dp[0], dp[1] = (1, 1) for i in range(2, n + 1): dp[i] = dp[i - 1] + dp[i - 2] return dp[n] if __name__ == "__main__": import doctest doctest.testmod()
#!/usr/bin/env python3 def climb_stairs(n: int) -> int: """ LeetCdoe No.70: Climbing Stairs Distinct ways to climb a n step staircase where each time you can either climb 1 or 2 steps. Args: n: number of steps of staircase Returns: Distinct ways to climb a n step staircase Raises: AssertionError: n not positive integer >>> climb_stairs(3) 3 >>> climb_stairs(1) 1 >>> climb_stairs(-7) # doctest: +ELLIPSIS Traceback (most recent call last): ... AssertionError: n needs to be positive integer, your input -7 """ assert ( isinstance(n, int) and n > 0 ), f"n needs to be positive integer, your input {n}" if n == 1: return 1 dp = [0] * (n + 1) dp[0], dp[1] = (1, 1) for i in range(2, n + 1): dp[i] = dp[i - 1] + dp[i - 2] return dp[n] if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" In this problem, we want to determine all possible permutations of the given sequence. We use backtracking to solve this problem. Time complexity: O(n! * n), where n denotes the length of the given sequence. """ from __future__ import annotations def generate_all_permutations(sequence: list[int | str]) -> None: create_state_space_tree(sequence, [], 0, [0 for i in range(len(sequence))]) def create_state_space_tree( sequence: list[int | str], current_sequence: list[int | str], index: int, index_used: list[int], ) -> None: """ Creates a state space tree to iterate through each branch using DFS. We know that each state has exactly len(sequence) - index children. It terminates when it reaches the end of the given sequence. """ if index == len(sequence): print(current_sequence) return for i in range(len(sequence)): if not index_used[i]: current_sequence.append(sequence[i]) index_used[i] = True create_state_space_tree(sequence, current_sequence, index + 1, index_used) current_sequence.pop() index_used[i] = False """ remove the comment to take an input from the user print("Enter the elements") sequence = list(map(int, input().split())) """ sequence: list[int | str] = [3, 1, 2, 4] generate_all_permutations(sequence) sequence_2: list[int | str] = ["A", "B", "C"] generate_all_permutations(sequence_2)
""" In this problem, we want to determine all possible permutations of the given sequence. We use backtracking to solve this problem. Time complexity: O(n! * n), where n denotes the length of the given sequence. """ from __future__ import annotations def generate_all_permutations(sequence: list[int | str]) -> None: create_state_space_tree(sequence, [], 0, [0 for i in range(len(sequence))]) def create_state_space_tree( sequence: list[int | str], current_sequence: list[int | str], index: int, index_used: list[int], ) -> None: """ Creates a state space tree to iterate through each branch using DFS. We know that each state has exactly len(sequence) - index children. It terminates when it reaches the end of the given sequence. """ if index == len(sequence): print(current_sequence) return for i in range(len(sequence)): if not index_used[i]: current_sequence.append(sequence[i]) index_used[i] = True create_state_space_tree(sequence, current_sequence, index + 1, index_used) current_sequence.pop() index_used[i] = False """ remove the comment to take an input from the user print("Enter the elements") sequence = list(map(int, input().split())) """ sequence: list[int | str] = [3, 1, 2, 4] generate_all_permutations(sequence) sequence_2: list[int | str] = ["A", "B", "C"] generate_all_permutations(sequence_2)
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Given a array of length n, max_subarray_sum() finds the maximum of sum of contiguous sub-array using divide and conquer method. Time complexity : O(n log n) Ref : INTRODUCTION TO ALGORITHMS THIRD EDITION (section : 4, sub-section : 4.1, page : 70) """ def max_sum_from_start(array): """This function finds the maximum contiguous sum of array from 0 index Parameters : array (list[int]) : given array Returns : max_sum (int) : maximum contiguous sum of array from 0 index """ array_sum = 0 max_sum = float("-inf") for num in array: array_sum += num if array_sum > max_sum: max_sum = array_sum return max_sum def max_cross_array_sum(array, left, mid, right): """This function finds the maximum contiguous sum of left and right arrays Parameters : array, left, mid, right (list[int], int, int, int) Returns : (int) : maximum of sum of contiguous sum of left and right arrays """ max_sum_of_left = max_sum_from_start(array[left : mid + 1][::-1]) max_sum_of_right = max_sum_from_start(array[mid + 1 : right + 1]) return max_sum_of_left + max_sum_of_right def max_subarray_sum(array, left, right): """Maximum contiguous sub-array sum, using divide and conquer method Parameters : array, left, right (list[int], int, int) : given array, current left index and current right index Returns : int : maximum of sum of contiguous sub-array """ # base case: array has only one element if left == right: return array[right] # Recursion mid = (left + right) // 2 left_half_sum = max_subarray_sum(array, left, mid) right_half_sum = max_subarray_sum(array, mid + 1, right) cross_sum = max_cross_array_sum(array, left, mid, right) return max(left_half_sum, right_half_sum, cross_sum) array = [-2, -5, 6, -2, -3, 1, 5, -6] array_length = len(array) print( "Maximum sum of contiguous subarray:", max_subarray_sum(array, 0, array_length - 1) )
""" Given a array of length n, max_subarray_sum() finds the maximum of sum of contiguous sub-array using divide and conquer method. Time complexity : O(n log n) Ref : INTRODUCTION TO ALGORITHMS THIRD EDITION (section : 4, sub-section : 4.1, page : 70) """ def max_sum_from_start(array): """This function finds the maximum contiguous sum of array from 0 index Parameters : array (list[int]) : given array Returns : max_sum (int) : maximum contiguous sum of array from 0 index """ array_sum = 0 max_sum = float("-inf") for num in array: array_sum += num if array_sum > max_sum: max_sum = array_sum return max_sum def max_cross_array_sum(array, left, mid, right): """This function finds the maximum contiguous sum of left and right arrays Parameters : array, left, mid, right (list[int], int, int, int) Returns : (int) : maximum of sum of contiguous sum of left and right arrays """ max_sum_of_left = max_sum_from_start(array[left : mid + 1][::-1]) max_sum_of_right = max_sum_from_start(array[mid + 1 : right + 1]) return max_sum_of_left + max_sum_of_right def max_subarray_sum(array, left, right): """Maximum contiguous sub-array sum, using divide and conquer method Parameters : array, left, right (list[int], int, int) : given array, current left index and current right index Returns : int : maximum of sum of contiguous sub-array """ # base case: array has only one element if left == right: return array[right] # Recursion mid = (left + right) // 2 left_half_sum = max_subarray_sum(array, left, mid) right_half_sum = max_subarray_sum(array, mid + 1, right) cross_sum = max_cross_array_sum(array, left, mid, right) return max(left_half_sum, right_half_sum, cross_sum) array = [-2, -5, 6, -2, -3, 1, 5, -6] array_length = len(array) print( "Maximum sum of contiguous subarray:", max_subarray_sum(array, 0, array_length - 1) )
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/usr/bin/env python3 from __future__ import annotations import json import requests from bs4 import BeautifulSoup from fake_useragent import UserAgent headers = {"UserAgent": UserAgent().random} def extract_user_profile(script) -> dict: """ May raise json.decoder.JSONDecodeError """ data = script.contents[0] info = json.loads(data[data.find('{"config"') : -1]) return info["entry_data"]["ProfilePage"][0]["graphql"]["user"] class InstagramUser: """ Class Instagram crawl instagram user information Usage: (doctest failing on GitHub Actions) # >>> instagram_user = InstagramUser("github") # >>> instagram_user.is_verified True # >>> instagram_user.biography 'Built for developers.' """ def __init__(self, username): self.url = f"https://www.instagram.com/{username}/" self.user_data = self.get_json() def get_json(self) -> dict: """ Return a dict of user information """ html = requests.get(self.url, headers=headers).text scripts = BeautifulSoup(html, "html.parser").find_all("script") try: return extract_user_profile(scripts[4]) except (json.decoder.JSONDecodeError, KeyError): return extract_user_profile(scripts[3]) def __repr__(self) -> str: return f"{self.__class__.__name__}('{self.username}')" def __str__(self) -> str: return f"{self.fullname} ({self.username}) is {self.biography}" @property def username(self) -> str: return self.user_data["username"] @property def fullname(self) -> str: return self.user_data["full_name"] @property def biography(self) -> str: return self.user_data["biography"] @property def email(self) -> str: return self.user_data["business_email"] @property def website(self) -> str: return self.user_data["external_url"] @property def number_of_followers(self) -> int: return self.user_data["edge_followed_by"]["count"] @property def number_of_followings(self) -> int: return self.user_data["edge_follow"]["count"] @property def number_of_posts(self) -> int: return self.user_data["edge_owner_to_timeline_media"]["count"] @property def profile_picture_url(self) -> str: return self.user_data["profile_pic_url_hd"] @property def is_verified(self) -> bool: return self.user_data["is_verified"] @property def is_private(self) -> bool: return self.user_data["is_private"] def test_instagram_user(username: str = "github") -> None: """ A self running doctest >>> test_instagram_user() """ import os if os.environ.get("CI"): return None # test failing on GitHub Actions instagram_user = InstagramUser(username) assert instagram_user.user_data assert isinstance(instagram_user.user_data, dict) assert instagram_user.username == username if username != "github": return assert instagram_user.fullname == "GitHub" assert instagram_user.biography == "Built for developers." assert instagram_user.number_of_posts > 150 assert instagram_user.number_of_followers > 120000 assert instagram_user.number_of_followings > 15 assert instagram_user.email == "[email protected]" assert instagram_user.website == "https://github.com/readme" assert instagram_user.profile_picture_url.startswith("https://instagram.") assert instagram_user.is_verified is True assert instagram_user.is_private is False if __name__ == "__main__": import doctest doctest.testmod() instagram_user = InstagramUser("github") print(instagram_user) print(f"{instagram_user.number_of_posts = }") print(f"{instagram_user.number_of_followers = }") print(f"{instagram_user.number_of_followings = }") print(f"{instagram_user.email = }") print(f"{instagram_user.website = }") print(f"{instagram_user.profile_picture_url = }") print(f"{instagram_user.is_verified = }") print(f"{instagram_user.is_private = }")
#!/usr/bin/env python3 from __future__ import annotations import json import requests from bs4 import BeautifulSoup from fake_useragent import UserAgent headers = {"UserAgent": UserAgent().random} def extract_user_profile(script) -> dict: """ May raise json.decoder.JSONDecodeError """ data = script.contents[0] info = json.loads(data[data.find('{"config"') : -1]) return info["entry_data"]["ProfilePage"][0]["graphql"]["user"] class InstagramUser: """ Class Instagram crawl instagram user information Usage: (doctest failing on GitHub Actions) # >>> instagram_user = InstagramUser("github") # >>> instagram_user.is_verified True # >>> instagram_user.biography 'Built for developers.' """ def __init__(self, username): self.url = f"https://www.instagram.com/{username}/" self.user_data = self.get_json() def get_json(self) -> dict: """ Return a dict of user information """ html = requests.get(self.url, headers=headers).text scripts = BeautifulSoup(html, "html.parser").find_all("script") try: return extract_user_profile(scripts[4]) except (json.decoder.JSONDecodeError, KeyError): return extract_user_profile(scripts[3]) def __repr__(self) -> str: return f"{self.__class__.__name__}('{self.username}')" def __str__(self) -> str: return f"{self.fullname} ({self.username}) is {self.biography}" @property def username(self) -> str: return self.user_data["username"] @property def fullname(self) -> str: return self.user_data["full_name"] @property def biography(self) -> str: return self.user_data["biography"] @property def email(self) -> str: return self.user_data["business_email"] @property def website(self) -> str: return self.user_data["external_url"] @property def number_of_followers(self) -> int: return self.user_data["edge_followed_by"]["count"] @property def number_of_followings(self) -> int: return self.user_data["edge_follow"]["count"] @property def number_of_posts(self) -> int: return self.user_data["edge_owner_to_timeline_media"]["count"] @property def profile_picture_url(self) -> str: return self.user_data["profile_pic_url_hd"] @property def is_verified(self) -> bool: return self.user_data["is_verified"] @property def is_private(self) -> bool: return self.user_data["is_private"] def test_instagram_user(username: str = "github") -> None: """ A self running doctest >>> test_instagram_user() """ import os if os.environ.get("CI"): return None # test failing on GitHub Actions instagram_user = InstagramUser(username) assert instagram_user.user_data assert isinstance(instagram_user.user_data, dict) assert instagram_user.username == username if username != "github": return assert instagram_user.fullname == "GitHub" assert instagram_user.biography == "Built for developers." assert instagram_user.number_of_posts > 150 assert instagram_user.number_of_followers > 120000 assert instagram_user.number_of_followings > 15 assert instagram_user.email == "[email protected]" assert instagram_user.website == "https://github.com/readme" assert instagram_user.profile_picture_url.startswith("https://instagram.") assert instagram_user.is_verified is True assert instagram_user.is_private is False if __name__ == "__main__": import doctest doctest.testmod() instagram_user = InstagramUser("github") print(instagram_user) print(f"{instagram_user.number_of_posts = }") print(f"{instagram_user.number_of_followers = }") print(f"{instagram_user.number_of_followings = }") print(f"{instagram_user.email = }") print(f"{instagram_user.website = }") print(f"{instagram_user.profile_picture_url = }") print(f"{instagram_user.is_verified = }") print(f"{instagram_user.is_private = }")
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import cv2 import numpy as np """ Harris Corner Detector https://en.wikipedia.org/wiki/Harris_Corner_Detector """ class Harris_Corner: def __init__(self, k: float, window_size: int): """ k : is an empirically determined constant in [0.04,0.06] window_size : neighbourhoods considered """ if k in (0.04, 0.06): self.k = k self.window_size = window_size else: raise ValueError("invalid k value") def __str__(self) -> str: return f"Harris Corner detection with k : {self.k}" def detect(self, img_path: str) -> tuple[cv2.Mat, list[list[int]]]: """ Returns the image with corners identified img_path : path of the image output : list of the corner positions, image """ img = cv2.imread(img_path, 0) h, w = img.shape corner_list: list[list[int]] = [] color_img = img.copy() color_img = cv2.cvtColor(color_img, cv2.COLOR_GRAY2RGB) dy, dx = np.gradient(img) ixx = dx ** 2 iyy = dy ** 2 ixy = dx * dy k = 0.04 offset = self.window_size // 2 for y in range(offset, h - offset): for x in range(offset, w - offset): wxx = ixx[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() wyy = iyy[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() wxy = ixy[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() det = (wxx * wyy) - (wxy ** 2) trace = wxx + wyy r = det - k * (trace ** 2) # Can change the value if r > 0.5: corner_list.append([x, y, r]) color_img.itemset((y, x, 0), 0) color_img.itemset((y, x, 1), 0) color_img.itemset((y, x, 2), 255) return color_img, corner_list if __name__ == "__main__": edge_detect = Harris_Corner(0.04, 3) color_img, _ = edge_detect.detect("path_to_image") cv2.imwrite("detect.png", color_img)
import cv2 import numpy as np """ Harris Corner Detector https://en.wikipedia.org/wiki/Harris_Corner_Detector """ class Harris_Corner: def __init__(self, k: float, window_size: int): """ k : is an empirically determined constant in [0.04,0.06] window_size : neighbourhoods considered """ if k in (0.04, 0.06): self.k = k self.window_size = window_size else: raise ValueError("invalid k value") def __str__(self) -> str: return f"Harris Corner detection with k : {self.k}" def detect(self, img_path: str) -> tuple[cv2.Mat, list[list[int]]]: """ Returns the image with corners identified img_path : path of the image output : list of the corner positions, image """ img = cv2.imread(img_path, 0) h, w = img.shape corner_list: list[list[int]] = [] color_img = img.copy() color_img = cv2.cvtColor(color_img, cv2.COLOR_GRAY2RGB) dy, dx = np.gradient(img) ixx = dx ** 2 iyy = dy ** 2 ixy = dx * dy k = 0.04 offset = self.window_size // 2 for y in range(offset, h - offset): for x in range(offset, w - offset): wxx = ixx[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() wyy = iyy[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() wxy = ixy[ y - offset : y + offset + 1, x - offset : x + offset + 1 ].sum() det = (wxx * wyy) - (wxy ** 2) trace = wxx + wyy r = det - k * (trace ** 2) # Can change the value if r > 0.5: corner_list.append([x, y, r]) color_img.itemset((y, x, 0), 0) color_img.itemset((y, x, 1), 0) color_img.itemset((y, x, 2), 255) return color_img, corner_list if __name__ == "__main__": edge_detect = Harris_Corner(0.04, 3) color_img, _ = edge_detect.detect("path_to_image") cv2.imwrite("detect.png", color_img)
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Calculate the nth Proth number Source: https://handwiki.org/wiki/Proth_number """ import math def proth(number: int) -> int: """ :param number: nth number to calculate in the sequence :return: the nth number in Proth number Note: indexing starts at 1 i.e. proth(1) gives the first Proth number of 3 >>> proth(6) 25 >>> proth(0) Traceback (most recent call last): ... ValueError: Input value of [number=0] must be > 0 >>> proth(-1) Traceback (most recent call last): ... ValueError: Input value of [number=-1] must be > 0 >>> proth(6.0) Traceback (most recent call last): ... TypeError: Input value of [number=6.0] must be an integer """ if not isinstance(number, int): raise TypeError(f"Input value of [number={number}] must be an integer") if number < 1: raise ValueError(f"Input value of [number={number}] must be > 0") elif number == 1: return 3 elif number == 2: return 5 else: """ +1 for binary starting at 0 i.e. 2^0, 2^1, etc. +1 to start the sequence at the 3rd Proth number Hence, we have a +2 in the below statement """ block_index = int(math.log(number // 3, 2)) + 2 proth_list = [3, 5] proth_index = 2 increment = 3 for block in range(1, block_index): for move in range(increment): proth_list.append(2 ** (block + 1) + proth_list[proth_index - 1]) proth_index += 1 increment *= 2 return proth_list[number - 1] if __name__ == "__main__": import doctest doctest.testmod() for number in range(11): value = 0 try: value = proth(number) except ValueError: print(f"ValueError: there is no {number}th Proth number") continue print(f"The {number}th Proth number: {value}")
""" Calculate the nth Proth number Source: https://handwiki.org/wiki/Proth_number """ import math def proth(number: int) -> int: """ :param number: nth number to calculate in the sequence :return: the nth number in Proth number Note: indexing starts at 1 i.e. proth(1) gives the first Proth number of 3 >>> proth(6) 25 >>> proth(0) Traceback (most recent call last): ... ValueError: Input value of [number=0] must be > 0 >>> proth(-1) Traceback (most recent call last): ... ValueError: Input value of [number=-1] must be > 0 >>> proth(6.0) Traceback (most recent call last): ... TypeError: Input value of [number=6.0] must be an integer """ if not isinstance(number, int): raise TypeError(f"Input value of [number={number}] must be an integer") if number < 1: raise ValueError(f"Input value of [number={number}] must be > 0") elif number == 1: return 3 elif number == 2: return 5 else: """ +1 for binary starting at 0 i.e. 2^0, 2^1, etc. +1 to start the sequence at the 3rd Proth number Hence, we have a +2 in the below statement """ block_index = int(math.log(number // 3, 2)) + 2 proth_list = [3, 5] proth_index = 2 increment = 3 for block in range(1, block_index): for move in range(increment): proth_list.append(2 ** (block + 1) + proth_list[proth_index - 1]) proth_index += 1 increment *= 2 return proth_list[number - 1] if __name__ == "__main__": import doctest doctest.testmod() for number in range(11): value = 0 try: value = proth(number) except ValueError: print(f"ValueError: there is no {number}th Proth number") continue print(f"The {number}th Proth number: {value}")
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from __future__ import annotations from collections import deque class Automaton: def __init__(self, keywords: list[str]): self.adlist: list[dict] = list() self.adlist.append( {"value": "", "next_states": [], "fail_state": 0, "output": []} ) for keyword in keywords: self.add_keyword(keyword) self.set_fail_transitions() def find_next_state(self, current_state: int, char: str) -> int | None: for state in self.adlist[current_state]["next_states"]: if char == self.adlist[state]["value"]: return state return None def add_keyword(self, keyword: str) -> None: current_state = 0 for character in keyword: next_state = self.find_next_state(current_state, character) if next_state is None: self.adlist.append( { "value": character, "next_states": [], "fail_state": 0, "output": [], } ) self.adlist[current_state]["next_states"].append(len(self.adlist) - 1) current_state = len(self.adlist) - 1 else: current_state = next_state self.adlist[current_state]["output"].append(keyword) def set_fail_transitions(self) -> None: q: deque = deque() for node in self.adlist[0]["next_states"]: q.append(node) self.adlist[node]["fail_state"] = 0 while q: r = q.popleft() for child in self.adlist[r]["next_states"]: q.append(child) state = self.adlist[r]["fail_state"] while ( self.find_next_state(state, self.adlist[child]["value"]) is None and state != 0 ): state = self.adlist[state]["fail_state"] self.adlist[child]["fail_state"] = self.find_next_state( state, self.adlist[child]["value"] ) if self.adlist[child]["fail_state"] is None: self.adlist[child]["fail_state"] = 0 self.adlist[child]["output"] = ( self.adlist[child]["output"] + self.adlist[self.adlist[child]["fail_state"]]["output"] ) def search_in(self, string: str) -> dict[str, list[int]]: """ >>> A = Automaton(["what", "hat", "ver", "er"]) >>> A.search_in("whatever, err ... , wherever") {'what': [0], 'hat': [1], 'ver': [5, 25], 'er': [6, 10, 22, 26]} """ result: dict = ( dict() ) # returns a dict with keywords and list of its occurrences current_state = 0 for i in range(len(string)): while ( self.find_next_state(current_state, string[i]) is None and current_state != 0 ): current_state = self.adlist[current_state]["fail_state"] next_state = self.find_next_state(current_state, string[i]) if next_state is None: current_state = 0 else: current_state = next_state for key in self.adlist[current_state]["output"]: if not (key in result): result[key] = [] result[key].append(i - len(key) + 1) return result if __name__ == "__main__": import doctest doctest.testmod()
from __future__ import annotations from collections import deque class Automaton: def __init__(self, keywords: list[str]): self.adlist: list[dict] = list() self.adlist.append( {"value": "", "next_states": [], "fail_state": 0, "output": []} ) for keyword in keywords: self.add_keyword(keyword) self.set_fail_transitions() def find_next_state(self, current_state: int, char: str) -> int | None: for state in self.adlist[current_state]["next_states"]: if char == self.adlist[state]["value"]: return state return None def add_keyword(self, keyword: str) -> None: current_state = 0 for character in keyword: next_state = self.find_next_state(current_state, character) if next_state is None: self.adlist.append( { "value": character, "next_states": [], "fail_state": 0, "output": [], } ) self.adlist[current_state]["next_states"].append(len(self.adlist) - 1) current_state = len(self.adlist) - 1 else: current_state = next_state self.adlist[current_state]["output"].append(keyword) def set_fail_transitions(self) -> None: q: deque = deque() for node in self.adlist[0]["next_states"]: q.append(node) self.adlist[node]["fail_state"] = 0 while q: r = q.popleft() for child in self.adlist[r]["next_states"]: q.append(child) state = self.adlist[r]["fail_state"] while ( self.find_next_state(state, self.adlist[child]["value"]) is None and state != 0 ): state = self.adlist[state]["fail_state"] self.adlist[child]["fail_state"] = self.find_next_state( state, self.adlist[child]["value"] ) if self.adlist[child]["fail_state"] is None: self.adlist[child]["fail_state"] = 0 self.adlist[child]["output"] = ( self.adlist[child]["output"] + self.adlist[self.adlist[child]["fail_state"]]["output"] ) def search_in(self, string: str) -> dict[str, list[int]]: """ >>> A = Automaton(["what", "hat", "ver", "er"]) >>> A.search_in("whatever, err ... , wherever") {'what': [0], 'hat': [1], 'ver': [5, 25], 'er': [6, 10, 22, 26]} """ result: dict = ( dict() ) # returns a dict with keywords and list of its occurrences current_state = 0 for i in range(len(string)): while ( self.find_next_state(current_state, string[i]) is None and current_state != 0 ): current_state = self.adlist[current_state]["fail_state"] next_state = self.find_next_state(current_state, string[i]) if next_state is None: current_state = 0 else: current_state = next_state for key in self.adlist[current_state]["output"]: if not (key in result): result[key] = [] result[key].append(i - len(key) + 1) return result if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#
#
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" A Trie/Prefix Tree is a kind of search tree used to provide quick lookup of words/patterns in a set of words. A basic Trie however has O(n^2) space complexity making it impractical in practice. It however provides O(max(search_string, length of longest word)) lookup time making it an optimal approach when space is not an issue. """ class TrieNode: def __init__(self) -> None: self.nodes: dict[str, TrieNode] = dict() # Mapping from char to TrieNode self.is_leaf = False def insert_many(self, words: list[str]) -> None: """ Inserts a list of words into the Trie :param words: list of string words :return: None """ for word in words: self.insert(word) def insert(self, word: str) -> None: """ Inserts a word into the Trie :param word: word to be inserted :return: None """ curr = self for char in word: if char not in curr.nodes: curr.nodes[char] = TrieNode() curr = curr.nodes[char] curr.is_leaf = True def find(self, word: str) -> bool: """ Tries to find word in a Trie :param word: word to look for :return: Returns True if word is found, False otherwise """ curr = self for char in word: if char not in curr.nodes: return False curr = curr.nodes[char] return curr.is_leaf def delete(self, word: str) -> None: """ Deletes a word in a Trie :param word: word to delete :return: None """ def _delete(curr: TrieNode, word: str, index: int) -> bool: if index == len(word): # If word does not exist if not curr.is_leaf: return False curr.is_leaf = False return len(curr.nodes) == 0 char = word[index] char_node = curr.nodes.get(char) # If char not in current trie node if not char_node: return False # Flag to check if node can be deleted delete_curr = _delete(char_node, word, index + 1) if delete_curr: del curr.nodes[char] return len(curr.nodes) == 0 return delete_curr _delete(self, word, 0) def print_words(node: TrieNode, word: str) -> None: """ Prints all the words in a Trie :param node: root node of Trie :param word: Word variable should be empty at start :return: None """ if node.is_leaf: print(word, end=" ") for key, value in node.nodes.items(): print_words(value, word + key) def test_trie() -> bool: words = "banana bananas bandana band apple all beast".split() root = TrieNode() root.insert_many(words) # print_words(root, "") assert all(root.find(word) for word in words) assert root.find("banana") assert not root.find("bandanas") assert not root.find("apps") assert root.find("apple") assert root.find("all") root.delete("all") assert not root.find("all") root.delete("banana") assert not root.find("banana") assert root.find("bananas") return True def print_results(msg: str, passes: bool) -> None: print(str(msg), "works!" if passes else "doesn't work :(") def pytests() -> None: assert test_trie() def main() -> None: """ >>> pytests() """ print_results("Testing trie functionality", test_trie()) if __name__ == "__main__": main()
""" A Trie/Prefix Tree is a kind of search tree used to provide quick lookup of words/patterns in a set of words. A basic Trie however has O(n^2) space complexity making it impractical in practice. It however provides O(max(search_string, length of longest word)) lookup time making it an optimal approach when space is not an issue. """ class TrieNode: def __init__(self) -> None: self.nodes: dict[str, TrieNode] = dict() # Mapping from char to TrieNode self.is_leaf = False def insert_many(self, words: list[str]) -> None: """ Inserts a list of words into the Trie :param words: list of string words :return: None """ for word in words: self.insert(word) def insert(self, word: str) -> None: """ Inserts a word into the Trie :param word: word to be inserted :return: None """ curr = self for char in word: if char not in curr.nodes: curr.nodes[char] = TrieNode() curr = curr.nodes[char] curr.is_leaf = True def find(self, word: str) -> bool: """ Tries to find word in a Trie :param word: word to look for :return: Returns True if word is found, False otherwise """ curr = self for char in word: if char not in curr.nodes: return False curr = curr.nodes[char] return curr.is_leaf def delete(self, word: str) -> None: """ Deletes a word in a Trie :param word: word to delete :return: None """ def _delete(curr: TrieNode, word: str, index: int) -> bool: if index == len(word): # If word does not exist if not curr.is_leaf: return False curr.is_leaf = False return len(curr.nodes) == 0 char = word[index] char_node = curr.nodes.get(char) # If char not in current trie node if not char_node: return False # Flag to check if node can be deleted delete_curr = _delete(char_node, word, index + 1) if delete_curr: del curr.nodes[char] return len(curr.nodes) == 0 return delete_curr _delete(self, word, 0) def print_words(node: TrieNode, word: str) -> None: """ Prints all the words in a Trie :param node: root node of Trie :param word: Word variable should be empty at start :return: None """ if node.is_leaf: print(word, end=" ") for key, value in node.nodes.items(): print_words(value, word + key) def test_trie() -> bool: words = "banana bananas bandana band apple all beast".split() root = TrieNode() root.insert_many(words) # print_words(root, "") assert all(root.find(word) for word in words) assert root.find("banana") assert not root.find("bandanas") assert not root.find("apps") assert root.find("apple") assert root.find("all") root.delete("all") assert not root.find("all") root.delete("banana") assert not root.find("banana") assert root.find("bananas") return True def print_results(msg: str, passes: bool) -> None: print(str(msg), "works!" if passes else "doesn't work :(") def pytests() -> None: assert test_trie() def main() -> None: """ >>> pytests() """ print_results("Testing trie functionality", test_trie()) if __name__ == "__main__": main()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Problem 120 Square remainders: https://projecteuler.net/problem=120 Description: Let r be the remainder when (a−1)^n + (a+1)^n is divided by a^2. For example, if a = 7 and n = 3, then r = 42: 6^3 + 8^3 = 728 ≡ 42 mod 49. And as n varies, so too will r, but for a = 7 it turns out that r_max = 42. For 3 ≤ a ≤ 1000, find ∑ r_max. Solution: On expanding the terms, we get 2 if n is even and 2an if n is odd. For maximizing the value, 2an < a*a => n <= (a - 1)/2 (integer division) """ def solution(n: int = 1000) -> int: """ Returns ∑ r_max for 3 <= a <= n as explained above >>> solution(10) 300 >>> solution(100) 330750 >>> solution(1000) 333082500 """ return sum(2 * a * ((a - 1) // 2) for a in range(3, n + 1)) if __name__ == "__main__": print(solution())
""" Problem 120 Square remainders: https://projecteuler.net/problem=120 Description: Let r be the remainder when (a−1)^n + (a+1)^n is divided by a^2. For example, if a = 7 and n = 3, then r = 42: 6^3 + 8^3 = 728 ≡ 42 mod 49. And as n varies, so too will r, but for a = 7 it turns out that r_max = 42. For 3 ≤ a ≤ 1000, find ∑ r_max. Solution: On expanding the terms, we get 2 if n is even and 2an if n is odd. For maximizing the value, 2an < a*a => n <= (a - 1)/2 (integer division) """ def solution(n: int = 1000) -> int: """ Returns ∑ r_max for 3 <= a <= n as explained above >>> solution(10) 300 >>> solution(100) 330750 >>> solution(1000) 333082500 """ return sum(2 * a * ((a - 1) // 2) for a in range(3, n + 1)) if __name__ == "__main__": print(solution())
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Problem 145: https://projecteuler.net/problem=145 Name: How many reversible numbers are there below one-billion? Some positive integers n have the property that the sum [ n + reverse(n) ] consists entirely of odd (decimal) digits. For instance, 36 + 63 = 99 and 409 + 904 = 1313. We will call such numbers reversible; so 36, 63, 409, and 904 are reversible. Leading zeroes are not allowed in either n or reverse(n). There are 120 reversible numbers below one-thousand. How many reversible numbers are there below one-billion (10^9)? Solution: Here a brute force solution is used to find and count the reversible numbers. """ from __future__ import annotations def check_if_odd(sum: int = 36) -> int: """ Check if the last digit in the sum is even or odd. If even return 0. If odd then floor division by 10 is used to remove the last number. Process continues until sum becomes 0 because no more numbers. >>> check_if_odd(36) 0 >>> check_if_odd(33) 1 """ while sum > 0: if (sum % 10) % 2 == 0: return 0 sum = sum // 10 return 1 def find_reverse_number(number: int = 36) -> int: """ Reverses the given number. Does not work with number that end in zero. >>> find_reverse_number(36) 63 >>> find_reverse_number(409) 904 """ reverse = 0 while number > 0: temp = number % 10 reverse = reverse * 10 + temp number = number // 10 return reverse def solution(number: int = 1000000000) -> int: """ Loops over the range of numbers. Checks if they have ending zeros which disqualifies them from being reversible. If that condition is passed it generates the reversed number. Then sum up n and reverse(n). Then check if all the numbers in the sum are odd. If true add to the answer. >>> solution(1000000000) 608720 >>> solution(1000000) 18720 >>> solution(1000000) 18720 >>> solution(1000) 120 """ answer = 0 for x in range(1, number): if x % 10 != 0: reversed_number = find_reverse_number(x) sum = x + reversed_number answer += check_if_odd(sum) return answer if __name__ == "__main__": print(f"{solution() = }")
""" Problem 145: https://projecteuler.net/problem=145 Name: How many reversible numbers are there below one-billion? Some positive integers n have the property that the sum [ n + reverse(n) ] consists entirely of odd (decimal) digits. For instance, 36 + 63 = 99 and 409 + 904 = 1313. We will call such numbers reversible; so 36, 63, 409, and 904 are reversible. Leading zeroes are not allowed in either n or reverse(n). There are 120 reversible numbers below one-thousand. How many reversible numbers are there below one-billion (10^9)? Solution: Here a brute force solution is used to find and count the reversible numbers. """ from __future__ import annotations def check_if_odd(sum: int = 36) -> int: """ Check if the last digit in the sum is even or odd. If even return 0. If odd then floor division by 10 is used to remove the last number. Process continues until sum becomes 0 because no more numbers. >>> check_if_odd(36) 0 >>> check_if_odd(33) 1 """ while sum > 0: if (sum % 10) % 2 == 0: return 0 sum = sum // 10 return 1 def find_reverse_number(number: int = 36) -> int: """ Reverses the given number. Does not work with number that end in zero. >>> find_reverse_number(36) 63 >>> find_reverse_number(409) 904 """ reverse = 0 while number > 0: temp = number % 10 reverse = reverse * 10 + temp number = number // 10 return reverse def solution(number: int = 1000000000) -> int: """ Loops over the range of numbers. Checks if they have ending zeros which disqualifies them from being reversible. If that condition is passed it generates the reversed number. Then sum up n and reverse(n). Then check if all the numbers in the sum are odd. If true add to the answer. >>> solution(1000000000) 608720 >>> solution(1000000) 18720 >>> solution(1000000) 18720 >>> solution(1000) 120 """ answer = 0 for x in range(1, number): if x % 10 != 0: reversed_number = find_reverse_number(x) sum = x + reversed_number answer += check_if_odd(sum) return answer if __name__ == "__main__": print(f"{solution() = }")
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Project Euler Problem 6: https://projecteuler.net/problem=6 Sum square difference The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ten natural numbers is, (1 + 2 + ... + 10)^2 = 55^2 = 3025 Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 - 385 = 2640. Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. """ def solution(n: int = 100) -> int: """ Returns the difference between the sum of the squares of the first n natural numbers and the square of the sum. >>> solution(10) 2640 >>> solution(15) 13160 >>> solution(20) 41230 >>> solution(50) 1582700 """ sum_of_squares = 0 sum_of_ints = 0 for i in range(1, n + 1): sum_of_squares += i ** 2 sum_of_ints += i return sum_of_ints ** 2 - sum_of_squares if __name__ == "__main__": print(f"{solution() = }")
""" Project Euler Problem 6: https://projecteuler.net/problem=6 Sum square difference The sum of the squares of the first ten natural numbers is, 1^2 + 2^2 + ... + 10^2 = 385 The square of the sum of the first ten natural numbers is, (1 + 2 + ... + 10)^2 = 55^2 = 3025 Hence the difference between the sum of the squares of the first ten natural numbers and the square of the sum is 3025 - 385 = 2640. Find the difference between the sum of the squares of the first one hundred natural numbers and the square of the sum. """ def solution(n: int = 100) -> int: """ Returns the difference between the sum of the squares of the first n natural numbers and the square of the sum. >>> solution(10) 2640 >>> solution(15) 13160 >>> solution(20) 41230 >>> solution(50) 1582700 """ sum_of_squares = 0 sum_of_ints = 0 for i in range(1, n + 1): sum_of_squares += i ** 2 sum_of_ints += i return sum_of_ints ** 2 - sum_of_squares if __name__ == "__main__": print(f"{solution() = }")
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import numpy as np """ Here I implemented the scoring functions. MAE, MSE, RMSE, RMSLE are included. Those are used for calculating differences between predicted values and actual values. Metrics are slightly differentiated. Sometimes squared, rooted, even log is used. Using log and roots can be perceived as tools for penalizing big errors. However, using appropriate metrics depends on the situations, and types of data """ # Mean Absolute Error def mae(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(mae(predict,actual),decimals = 2) 0.67 >>> actual = [1,1,1];predict = [1,1,1] >>> mae(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = abs(predict - actual) score = difference.mean() return score # Mean Squared Error def mse(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(mse(predict,actual),decimals = 2) 1.33 >>> actual = [1,1,1];predict = [1,1,1] >>> mse(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual square_diff = np.square(difference) score = square_diff.mean() return score # Root Mean Squared Error def rmse(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(rmse(predict,actual),decimals = 2) 1.15 >>> actual = [1,1,1];predict = [1,1,1] >>> rmse(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual square_diff = np.square(difference) mean_square_diff = square_diff.mean() score = np.sqrt(mean_square_diff) return score # Root Mean Square Logarithmic Error def rmsle(predict, actual): """ Examples(rounded for precision): >>> actual = [10,10,30];predict = [10,2,30] >>> np.around(rmsle(predict,actual),decimals = 2) 0.75 >>> actual = [1,1,1];predict = [1,1,1] >>> rmsle(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) log_predict = np.log(predict + 1) log_actual = np.log(actual + 1) difference = log_predict - log_actual square_diff = np.square(difference) mean_square_diff = square_diff.mean() score = np.sqrt(mean_square_diff) return score # Mean Bias Deviation def mbd(predict, actual): """ This value is Negative, if the model underpredicts, positive, if it overpredicts. Example(rounded for precision): Here the model overpredicts >>> actual = [1,2,3];predict = [2,3,4] >>> np.around(mbd(predict,actual),decimals = 2) 50.0 Here the model underpredicts >>> actual = [1,2,3];predict = [0,1,1] >>> np.around(mbd(predict,actual),decimals = 2) -66.67 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual numerator = np.sum(difference) / len(predict) denumerator = np.sum(actual) / len(predict) # print(numerator, denumerator) score = float(numerator) / denumerator * 100 return score def manual_accuracy(predict, actual): return np.mean(np.array(actual) == np.array(predict))
import numpy as np """ Here I implemented the scoring functions. MAE, MSE, RMSE, RMSLE are included. Those are used for calculating differences between predicted values and actual values. Metrics are slightly differentiated. Sometimes squared, rooted, even log is used. Using log and roots can be perceived as tools for penalizing big errors. However, using appropriate metrics depends on the situations, and types of data """ # Mean Absolute Error def mae(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(mae(predict,actual),decimals = 2) 0.67 >>> actual = [1,1,1];predict = [1,1,1] >>> mae(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = abs(predict - actual) score = difference.mean() return score # Mean Squared Error def mse(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(mse(predict,actual),decimals = 2) 1.33 >>> actual = [1,1,1];predict = [1,1,1] >>> mse(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual square_diff = np.square(difference) score = square_diff.mean() return score # Root Mean Squared Error def rmse(predict, actual): """ Examples(rounded for precision): >>> actual = [1,2,3];predict = [1,4,3] >>> np.around(rmse(predict,actual),decimals = 2) 1.15 >>> actual = [1,1,1];predict = [1,1,1] >>> rmse(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual square_diff = np.square(difference) mean_square_diff = square_diff.mean() score = np.sqrt(mean_square_diff) return score # Root Mean Square Logarithmic Error def rmsle(predict, actual): """ Examples(rounded for precision): >>> actual = [10,10,30];predict = [10,2,30] >>> np.around(rmsle(predict,actual),decimals = 2) 0.75 >>> actual = [1,1,1];predict = [1,1,1] >>> rmsle(predict,actual) 0.0 """ predict = np.array(predict) actual = np.array(actual) log_predict = np.log(predict + 1) log_actual = np.log(actual + 1) difference = log_predict - log_actual square_diff = np.square(difference) mean_square_diff = square_diff.mean() score = np.sqrt(mean_square_diff) return score # Mean Bias Deviation def mbd(predict, actual): """ This value is Negative, if the model underpredicts, positive, if it overpredicts. Example(rounded for precision): Here the model overpredicts >>> actual = [1,2,3];predict = [2,3,4] >>> np.around(mbd(predict,actual),decimals = 2) 50.0 Here the model underpredicts >>> actual = [1,2,3];predict = [0,1,1] >>> np.around(mbd(predict,actual),decimals = 2) -66.67 """ predict = np.array(predict) actual = np.array(actual) difference = predict - actual numerator = np.sum(difference) / len(predict) denumerator = np.sum(actual) / len(predict) # print(numerator, denumerator) score = float(numerator) / denumerator * 100 return score def manual_accuracy(predict, actual): return np.mean(np.array(actual) == np.array(predict))
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
[pytest] markers = mat_ops: tests for matrix operations
[pytest] markers = mat_ops: tests for matrix operations
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# Normal Distribution QuickSort Algorithm implementing QuickSort Algorithm where the pivot element is chosen randomly between first and last elements of the array and the array elements are taken from a Standard Normal Distribution. This is different from the ordinary quicksort in the sense, that it applies more to real life problems , where elements usually follow a normal distribution. Also the pivot is randomized to make it a more generic one. ## Array Elements The array elements are taken from a Standard Normal Distribution , having mean = 0 and standard deviation 1. #### The code ```python >>> import numpy as np >>> from tempfile import TemporaryFile >>> outfile = TemporaryFile() >>> p = 100 # 100 elements are to be sorted >>> mu, sigma = 0, 1 # mean and standard deviation >>> X = np.random.normal(mu, sigma, p) >>> np.save(outfile, X) >>> print('The array is') >>> print(X) ``` ------ #### The Distribution of the Array elements. ```python >>> mu, sigma = 0, 1 # mean and standard deviation >>> s = np.random.normal(mu, sigma, p) >>> count, bins, ignored = plt.hist(s, 30, normed=True) >>> plt.plot(bins , 1/(sigma * np.sqrt(2 * np.pi)) *np.exp( - (bins - mu)**2 / (2 * sigma**2) ),linewidth=2, color='r') >>> plt.show() ``` ----- ![](https://www.mathsisfun.com/data/images/normal-distrubution-large.gif) --- --------------------- -- ## Plotting the function for Checking 'The Number of Comparisons' taking place between Normal Distribution QuickSort and Ordinary QuickSort ```python >>>import matplotlib.pyplot as plt # Normal Disrtibution QuickSort is red >>> plt.plot([1,2,4,16,32,64,128,256,512,1024,2048],[1,1,6,15,43,136,340,800,2156,6821,16325],linewidth=2, color='r') #Ordinary QuickSort is green >>> plt.plot([1,2,4,16,32,64,128,256,512,1024,2048],[1,1,4,16,67,122,362,949,2131,5086,12866],linewidth=2, color='g') >>> plt.show() ``` ---- ------------------
# Normal Distribution QuickSort Algorithm implementing QuickSort Algorithm where the pivot element is chosen randomly between first and last elements of the array and the array elements are taken from a Standard Normal Distribution. This is different from the ordinary quicksort in the sense, that it applies more to real life problems , where elements usually follow a normal distribution. Also the pivot is randomized to make it a more generic one. ## Array Elements The array elements are taken from a Standard Normal Distribution , having mean = 0 and standard deviation 1. #### The code ```python >>> import numpy as np >>> from tempfile import TemporaryFile >>> outfile = TemporaryFile() >>> p = 100 # 100 elements are to be sorted >>> mu, sigma = 0, 1 # mean and standard deviation >>> X = np.random.normal(mu, sigma, p) >>> np.save(outfile, X) >>> print('The array is') >>> print(X) ``` ------ #### The Distribution of the Array elements. ```python >>> mu, sigma = 0, 1 # mean and standard deviation >>> s = np.random.normal(mu, sigma, p) >>> count, bins, ignored = plt.hist(s, 30, normed=True) >>> plt.plot(bins , 1/(sigma * np.sqrt(2 * np.pi)) *np.exp( - (bins - mu)**2 / (2 * sigma**2) ),linewidth=2, color='r') >>> plt.show() ``` ----- ![](https://www.mathsisfun.com/data/images/normal-distrubution-large.gif) --- --------------------- -- ## Plotting the function for Checking 'The Number of Comparisons' taking place between Normal Distribution QuickSort and Ordinary QuickSort ```python >>>import matplotlib.pyplot as plt # Normal Disrtibution QuickSort is red >>> plt.plot([1,2,4,16,32,64,128,256,512,1024,2048],[1,1,6,15,43,136,340,800,2156,6821,16325],linewidth=2, color='r') #Ordinary QuickSort is green >>> plt.plot([1,2,4,16,32,64,128,256,512,1024,2048],[1,1,4,16,67,122,362,949,2131,5086,12866],linewidth=2, color='g') >>> plt.show() ``` ---- ------------------
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Coin sums Problem 31: https://projecteuler.net/problem=31 In England the currency is made up of pound, £, and pence, p, and there are eight coins in general circulation: 1p, 2p, 5p, 10p, 20p, 50p, £1 (100p) and £2 (200p). It is possible to make £2 in the following way: 1×£1 + 1×50p + 2×20p + 1×5p + 1×2p + 3×1p How many different ways can £2 be made using any number of coins? """ def one_pence() -> int: return 1 def two_pence(x: int) -> int: return 0 if x < 0 else two_pence(x - 2) + one_pence() def five_pence(x: int) -> int: return 0 if x < 0 else five_pence(x - 5) + two_pence(x) def ten_pence(x: int) -> int: return 0 if x < 0 else ten_pence(x - 10) + five_pence(x) def twenty_pence(x: int) -> int: return 0 if x < 0 else twenty_pence(x - 20) + ten_pence(x) def fifty_pence(x: int) -> int: return 0 if x < 0 else fifty_pence(x - 50) + twenty_pence(x) def one_pound(x: int) -> int: return 0 if x < 0 else one_pound(x - 100) + fifty_pence(x) def two_pound(x: int) -> int: return 0 if x < 0 else two_pound(x - 200) + one_pound(x) def solution(n: int = 200) -> int: """Returns the number of different ways can n pence be made using any number of coins? >>> solution(500) 6295434 >>> solution(200) 73682 >>> solution(50) 451 >>> solution(10) 11 """ return two_pound(n) if __name__ == "__main__": print(solution(int(input().strip())))
""" Coin sums Problem 31: https://projecteuler.net/problem=31 In England the currency is made up of pound, £, and pence, p, and there are eight coins in general circulation: 1p, 2p, 5p, 10p, 20p, 50p, £1 (100p) and £2 (200p). It is possible to make £2 in the following way: 1×£1 + 1×50p + 2×20p + 1×5p + 1×2p + 3×1p How many different ways can £2 be made using any number of coins? """ def one_pence() -> int: return 1 def two_pence(x: int) -> int: return 0 if x < 0 else two_pence(x - 2) + one_pence() def five_pence(x: int) -> int: return 0 if x < 0 else five_pence(x - 5) + two_pence(x) def ten_pence(x: int) -> int: return 0 if x < 0 else ten_pence(x - 10) + five_pence(x) def twenty_pence(x: int) -> int: return 0 if x < 0 else twenty_pence(x - 20) + ten_pence(x) def fifty_pence(x: int) -> int: return 0 if x < 0 else fifty_pence(x - 50) + twenty_pence(x) def one_pound(x: int) -> int: return 0 if x < 0 else one_pound(x - 100) + fifty_pence(x) def two_pound(x: int) -> int: return 0 if x < 0 else two_pound(x - 200) + one_pound(x) def solution(n: int = 200) -> int: """Returns the number of different ways can n pence be made using any number of coins? >>> solution(500) 6295434 >>> solution(200) 73682 >>> solution(50) 451 >>> solution(10) 11 """ return two_pound(n) if __name__ == "__main__": print(solution(int(input().strip())))
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Functions useful for doing molecular chemistry: * molarity_to_normality * moles_to_pressure * moles_to_volume * pressure_and_volume_to_temperature """ def molarity_to_normality(nfactor: int, moles: float, volume: float) -> float: """ Convert molarity to normality. Volume is taken in litres. Wikipedia reference: https://en.wikipedia.org/wiki/Equivalent_concentration Wikipedia reference: https://en.wikipedia.org/wiki/Molar_concentration >>> molarity_to_normality(2, 3.1, 0.31) 20 >>> molarity_to_normality(4, 11.4, 5.7) 8 """ return round(float(moles / volume) * nfactor) def moles_to_pressure(volume: float, moles: float, temperature: float) -> float: """ Convert moles to pressure. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> moles_to_pressure(0.82, 3, 300) 90 >>> moles_to_pressure(8.2, 5, 200) 10 """ return round(float((moles * 0.0821 * temperature) / (volume))) def moles_to_volume(pressure: float, moles: float, temperature: float) -> float: """ Convert moles to volume. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> moles_to_volume(0.82, 3, 300) 90 >>> moles_to_volume(8.2, 5, 200) 10 """ return round(float((moles * 0.0821 * temperature) / (pressure))) def pressure_and_volume_to_temperature( pressure: float, moles: float, volume: float ) -> float: """ Convert pressure and volume to temperature. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> pressure_and_volume_to_temperature(0.82, 1, 2) 20 >>> pressure_and_volume_to_temperature(8.2, 5, 3) 60 """ return round(float((pressure * volume) / (0.0821 * moles))) if __name__ == "__main__": import doctest doctest.testmod()
""" Functions useful for doing molecular chemistry: * molarity_to_normality * moles_to_pressure * moles_to_volume * pressure_and_volume_to_temperature """ def molarity_to_normality(nfactor: int, moles: float, volume: float) -> float: """ Convert molarity to normality. Volume is taken in litres. Wikipedia reference: https://en.wikipedia.org/wiki/Equivalent_concentration Wikipedia reference: https://en.wikipedia.org/wiki/Molar_concentration >>> molarity_to_normality(2, 3.1, 0.31) 20 >>> molarity_to_normality(4, 11.4, 5.7) 8 """ return round(float(moles / volume) * nfactor) def moles_to_pressure(volume: float, moles: float, temperature: float) -> float: """ Convert moles to pressure. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> moles_to_pressure(0.82, 3, 300) 90 >>> moles_to_pressure(8.2, 5, 200) 10 """ return round(float((moles * 0.0821 * temperature) / (volume))) def moles_to_volume(pressure: float, moles: float, temperature: float) -> float: """ Convert moles to volume. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> moles_to_volume(0.82, 3, 300) 90 >>> moles_to_volume(8.2, 5, 200) 10 """ return round(float((moles * 0.0821 * temperature) / (pressure))) def pressure_and_volume_to_temperature( pressure: float, moles: float, volume: float ) -> float: """ Convert pressure and volume to temperature. Ideal gas laws are used. Temperature is taken in kelvin. Volume is taken in litres. Pressure has atm as SI unit. Wikipedia reference: https://en.wikipedia.org/wiki/Gas_laws Wikipedia reference: https://en.wikipedia.org/wiki/Pressure Wikipedia reference: https://en.wikipedia.org/wiki/Temperature >>> pressure_and_volume_to_temperature(0.82, 1, 2) 20 >>> pressure_and_volume_to_temperature(8.2, 5, 3) 60 """ return round(float((pressure * volume) / (0.0821 * moles))) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/usr/bin/env python3 """ Davis–Putnam–Logemann–Loveland (DPLL) algorithm is a complete, backtracking-based search algorithm for deciding the satisfiability of propositional logic formulae in conjunctive normal form, i.e, for solving the Conjunctive Normal Form SATisfiability (CNF-SAT) problem. For more information about the algorithm: https://en.wikipedia.org/wiki/DPLL_algorithm """ from __future__ import annotations import random from typing import Iterable class Clause: """ A clause represented in Conjunctive Normal Form. A clause is a set of literals, either complemented or otherwise. For example: {A1, A2, A3'} is the clause (A1 v A2 v A3') {A5', A2', A1} is the clause (A5' v A2' v A1) Create model >>> clause = Clause(["A1", "A2'", "A3"]) >>> clause.evaluate({"A1": True}) True """ def __init__(self, literals: list[str]) -> None: """ Represent the literals and an assignment in a clause." """ # Assign all literals to None initially self.literals: dict[str, bool | None] = {literal: None for literal in literals} def __str__(self) -> str: """ To print a clause as in Conjunctive Normal Form. >>> str(Clause(["A1", "A2'", "A3"])) "{A1 , A2' , A3}" """ return "{" + " , ".join(self.literals) + "}" def __len__(self) -> int: """ To print a clause as in Conjunctive Normal Form. >>> len(Clause([])) 0 >>> len(Clause(["A1", "A2'", "A3"])) 3 """ return len(self.literals) def assign(self, model: dict[str, bool | None]) -> None: """ Assign values to literals of the clause as given by model. """ for literal in self.literals: symbol = literal[:2] if symbol in model: value = model[symbol] else: continue if value is not None: # Complement assignment if literal is in complemented form if literal.endswith("'"): value = not value self.literals[literal] = value def evaluate(self, model: dict[str, bool | None]) -> bool | None: """ Evaluates the clause with the assignments in model. This has the following steps: 1. Return True if both a literal and its complement exist in the clause. 2. Return True if a single literal has the assignment True. 3. Return None(unable to complete evaluation) if a literal has no assignment. 4. Compute disjunction of all values assigned in clause. """ for literal in self.literals: symbol = literal.rstrip("'") if literal.endswith("'") else literal + "'" if symbol in self.literals: return True self.assign(model) for value in self.literals.values(): if value in (True, None): return value return any(self.literals.values()) class Formula: """ A formula represented in Conjunctive Normal Form. A formula is a set of clauses. For example, {{A1, A2, A3'}, {A5', A2', A1}} is ((A1 v A2 v A3') and (A5' v A2' v A1)) """ def __init__(self, clauses: Iterable[Clause]) -> None: """ Represent the number of clauses and the clauses themselves. """ self.clauses = list(clauses) def __str__(self) -> str: """ To print a formula as in Conjunctive Normal Form. str(Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])])) "{{A1 , A2' , A3} , {A5' , A2' , A1}}" """ return "{" + " , ".join(str(clause) for clause in self.clauses) + "}" def generate_clause() -> Clause: """ Randomly generate a clause. All literals have the name Ax, where x is an integer from 1 to 5. """ literals = [] no_of_literals = random.randint(1, 5) base_var = "A" i = 0 while i < no_of_literals: var_no = random.randint(1, 5) var_name = base_var + str(var_no) var_complement = random.randint(0, 1) if var_complement == 1: var_name += "'" if var_name in literals: i -= 1 else: literals.append(var_name) i += 1 return Clause(literals) def generate_formula() -> Formula: """ Randomly generate a formula. """ clauses: set[Clause] = set() no_of_clauses = random.randint(1, 10) while len(clauses) < no_of_clauses: clauses.add(generate_clause()) return Formula(clauses) def generate_parameters(formula: Formula) -> tuple[list[Clause], list[str]]: """ Return the clauses and symbols from a formula. A symbol is the uncomplemented form of a literal. For example, Symbol of A3 is A3. Symbol of A5' is A5. >>> formula = Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])]) >>> clauses, symbols = generate_parameters(formula) >>> clauses_list = [str(i) for i in clauses] >>> clauses_list ["{A1 , A2' , A3}", "{A5' , A2' , A1}"] >>> symbols ['A1', 'A2', 'A3', 'A5'] """ clauses = formula.clauses symbols_set = [] for clause in formula.clauses: for literal in clause.literals: symbol = literal[:2] if symbol not in symbols_set: symbols_set.append(symbol) return clauses, symbols_set def find_pure_symbols( clauses: list[Clause], symbols: list[str], model: dict[str, bool | None] ) -> tuple[list[str], dict[str, bool | None]]: """ Return pure symbols and their values to satisfy clause. Pure symbols are symbols in a formula that exist only in one form, either complemented or otherwise. For example, { { A4 , A3 , A5' , A1 , A3' } , { A4 } , { A3 } } has pure symbols A4, A5' and A1. This has the following steps: 1. Ignore clauses that have already evaluated to be True. 2. Find symbols that occur only in one form in the rest of the clauses. 3. Assign value True or False depending on whether the symbols occurs in normal or complemented form respectively. >>> formula = Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])]) >>> clauses, symbols = generate_parameters(formula) >>> pure_symbols, values = find_pure_symbols(clauses, symbols, {}) >>> pure_symbols ['A1', 'A2', 'A3', 'A5'] >>> values {'A1': True, 'A2': False, 'A3': True, 'A5': False} """ pure_symbols = [] assignment: dict[str, bool | None] = dict() literals = [] for clause in clauses: if clause.evaluate(model): continue for literal in clause.literals: literals.append(literal) for s in symbols: sym = s + "'" if (s in literals and sym not in literals) or ( s not in literals and sym in literals ): pure_symbols.append(s) for p in pure_symbols: assignment[p] = None for s in pure_symbols: sym = s + "'" if s in literals: assignment[s] = True elif sym in literals: assignment[s] = False return pure_symbols, assignment def find_unit_clauses( clauses: list[Clause], model: dict[str, bool | None] ) -> tuple[list[str], dict[str, bool | None]]: """ Returns the unit symbols and their values to satisfy clause. Unit symbols are symbols in a formula that are: - Either the only symbol in a clause - Or all other literals in that clause have been assigned False This has the following steps: 1. Find symbols that are the only occurrences in a clause. 2. Find symbols in a clause where all other literals are assigned False. 3. Assign True or False depending on whether the symbols occurs in normal or complemented form respectively. >>> clause1 = Clause(["A4", "A3", "A5'", "A1", "A3'"]) >>> clause2 = Clause(["A4"]) >>> clause3 = Clause(["A3"]) >>> clauses, symbols = generate_parameters(Formula([clause1, clause2, clause3])) >>> unit_clauses, values = find_unit_clauses(clauses, {}) >>> unit_clauses ['A4', 'A3'] >>> values {'A4': True, 'A3': True} """ unit_symbols = [] for clause in clauses: if len(clause) == 1: unit_symbols.append(list(clause.literals.keys())[0]) else: Fcount, Ncount = 0, 0 for literal, value in clause.literals.items(): if value is False: Fcount += 1 elif value is None: sym = literal Ncount += 1 if Fcount == len(clause) - 1 and Ncount == 1: unit_symbols.append(sym) assignment: dict[str, bool | None] = dict() for i in unit_symbols: symbol = i[:2] assignment[symbol] = len(i) == 2 unit_symbols = [i[:2] for i in unit_symbols] return unit_symbols, assignment def dpll_algorithm( clauses: list[Clause], symbols: list[str], model: dict[str, bool | None] ) -> tuple[bool | None, dict[str, bool | None] | None]: """ Returns the model if the formula is satisfiable, else None This has the following steps: 1. If every clause in clauses is True, return True. 2. If some clause in clauses is False, return False. 3. Find pure symbols. 4. Find unit symbols. >>> formula = Formula([Clause(["A4", "A3", "A5'", "A1", "A3'"]), Clause(["A4"])]) >>> clauses, symbols = generate_parameters(formula) >>> soln, model = dpll_algorithm(clauses, symbols, {}) >>> soln True >>> model {'A4': True} """ check_clause_all_true = True for clause in clauses: clause_check = clause.evaluate(model) if clause_check is False: return False, None elif clause_check is None: check_clause_all_true = False continue if check_clause_all_true: return True, model try: pure_symbols, assignment = find_pure_symbols(clauses, symbols, model) except RecursionError: print("raises a RecursionError and is") return None, {} P = None if len(pure_symbols) > 0: P, value = pure_symbols[0], assignment[pure_symbols[0]] if P: tmp_model = model tmp_model[P] = value tmp_symbols = [i for i in symbols] if P in tmp_symbols: tmp_symbols.remove(P) return dpll_algorithm(clauses, tmp_symbols, tmp_model) unit_symbols, assignment = find_unit_clauses(clauses, model) P = None if len(unit_symbols) > 0: P, value = unit_symbols[0], assignment[unit_symbols[0]] if P: tmp_model = model tmp_model[P] = value tmp_symbols = [i for i in symbols] if P in tmp_symbols: tmp_symbols.remove(P) return dpll_algorithm(clauses, tmp_symbols, tmp_model) P = symbols[0] rest = symbols[1:] tmp1, tmp2 = model, model tmp1[P], tmp2[P] = True, False return dpll_algorithm(clauses, rest, tmp1) or dpll_algorithm(clauses, rest, tmp2) if __name__ == "__main__": import doctest doctest.testmod() formula = generate_formula() print(f"The formula {formula} is", end=" ") clauses, symbols = generate_parameters(formula) solution, model = dpll_algorithm(clauses, symbols, {}) if solution: print(f"satisfiable with the assignment {model}.") else: print("not satisfiable.")
#!/usr/bin/env python3 """ Davis–Putnam–Logemann–Loveland (DPLL) algorithm is a complete, backtracking-based search algorithm for deciding the satisfiability of propositional logic formulae in conjunctive normal form, i.e, for solving the Conjunctive Normal Form SATisfiability (CNF-SAT) problem. For more information about the algorithm: https://en.wikipedia.org/wiki/DPLL_algorithm """ from __future__ import annotations import random from typing import Iterable class Clause: """ A clause represented in Conjunctive Normal Form. A clause is a set of literals, either complemented or otherwise. For example: {A1, A2, A3'} is the clause (A1 v A2 v A3') {A5', A2', A1} is the clause (A5' v A2' v A1) Create model >>> clause = Clause(["A1", "A2'", "A3"]) >>> clause.evaluate({"A1": True}) True """ def __init__(self, literals: list[str]) -> None: """ Represent the literals and an assignment in a clause." """ # Assign all literals to None initially self.literals: dict[str, bool | None] = {literal: None for literal in literals} def __str__(self) -> str: """ To print a clause as in Conjunctive Normal Form. >>> str(Clause(["A1", "A2'", "A3"])) "{A1 , A2' , A3}" """ return "{" + " , ".join(self.literals) + "}" def __len__(self) -> int: """ To print a clause as in Conjunctive Normal Form. >>> len(Clause([])) 0 >>> len(Clause(["A1", "A2'", "A3"])) 3 """ return len(self.literals) def assign(self, model: dict[str, bool | None]) -> None: """ Assign values to literals of the clause as given by model. """ for literal in self.literals: symbol = literal[:2] if symbol in model: value = model[symbol] else: continue if value is not None: # Complement assignment if literal is in complemented form if literal.endswith("'"): value = not value self.literals[literal] = value def evaluate(self, model: dict[str, bool | None]) -> bool | None: """ Evaluates the clause with the assignments in model. This has the following steps: 1. Return True if both a literal and its complement exist in the clause. 2. Return True if a single literal has the assignment True. 3. Return None(unable to complete evaluation) if a literal has no assignment. 4. Compute disjunction of all values assigned in clause. """ for literal in self.literals: symbol = literal.rstrip("'") if literal.endswith("'") else literal + "'" if symbol in self.literals: return True self.assign(model) for value in self.literals.values(): if value in (True, None): return value return any(self.literals.values()) class Formula: """ A formula represented in Conjunctive Normal Form. A formula is a set of clauses. For example, {{A1, A2, A3'}, {A5', A2', A1}} is ((A1 v A2 v A3') and (A5' v A2' v A1)) """ def __init__(self, clauses: Iterable[Clause]) -> None: """ Represent the number of clauses and the clauses themselves. """ self.clauses = list(clauses) def __str__(self) -> str: """ To print a formula as in Conjunctive Normal Form. str(Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])])) "{{A1 , A2' , A3} , {A5' , A2' , A1}}" """ return "{" + " , ".join(str(clause) for clause in self.clauses) + "}" def generate_clause() -> Clause: """ Randomly generate a clause. All literals have the name Ax, where x is an integer from 1 to 5. """ literals = [] no_of_literals = random.randint(1, 5) base_var = "A" i = 0 while i < no_of_literals: var_no = random.randint(1, 5) var_name = base_var + str(var_no) var_complement = random.randint(0, 1) if var_complement == 1: var_name += "'" if var_name in literals: i -= 1 else: literals.append(var_name) i += 1 return Clause(literals) def generate_formula() -> Formula: """ Randomly generate a formula. """ clauses: set[Clause] = set() no_of_clauses = random.randint(1, 10) while len(clauses) < no_of_clauses: clauses.add(generate_clause()) return Formula(clauses) def generate_parameters(formula: Formula) -> tuple[list[Clause], list[str]]: """ Return the clauses and symbols from a formula. A symbol is the uncomplemented form of a literal. For example, Symbol of A3 is A3. Symbol of A5' is A5. >>> formula = Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])]) >>> clauses, symbols = generate_parameters(formula) >>> clauses_list = [str(i) for i in clauses] >>> clauses_list ["{A1 , A2' , A3}", "{A5' , A2' , A1}"] >>> symbols ['A1', 'A2', 'A3', 'A5'] """ clauses = formula.clauses symbols_set = [] for clause in formula.clauses: for literal in clause.literals: symbol = literal[:2] if symbol not in symbols_set: symbols_set.append(symbol) return clauses, symbols_set def find_pure_symbols( clauses: list[Clause], symbols: list[str], model: dict[str, bool | None] ) -> tuple[list[str], dict[str, bool | None]]: """ Return pure symbols and their values to satisfy clause. Pure symbols are symbols in a formula that exist only in one form, either complemented or otherwise. For example, { { A4 , A3 , A5' , A1 , A3' } , { A4 } , { A3 } } has pure symbols A4, A5' and A1. This has the following steps: 1. Ignore clauses that have already evaluated to be True. 2. Find symbols that occur only in one form in the rest of the clauses. 3. Assign value True or False depending on whether the symbols occurs in normal or complemented form respectively. >>> formula = Formula([Clause(["A1", "A2'", "A3"]), Clause(["A5'", "A2'", "A1"])]) >>> clauses, symbols = generate_parameters(formula) >>> pure_symbols, values = find_pure_symbols(clauses, symbols, {}) >>> pure_symbols ['A1', 'A2', 'A3', 'A5'] >>> values {'A1': True, 'A2': False, 'A3': True, 'A5': False} """ pure_symbols = [] assignment: dict[str, bool | None] = dict() literals = [] for clause in clauses: if clause.evaluate(model): continue for literal in clause.literals: literals.append(literal) for s in symbols: sym = s + "'" if (s in literals and sym not in literals) or ( s not in literals and sym in literals ): pure_symbols.append(s) for p in pure_symbols: assignment[p] = None for s in pure_symbols: sym = s + "'" if s in literals: assignment[s] = True elif sym in literals: assignment[s] = False return pure_symbols, assignment def find_unit_clauses( clauses: list[Clause], model: dict[str, bool | None] ) -> tuple[list[str], dict[str, bool | None]]: """ Returns the unit symbols and their values to satisfy clause. Unit symbols are symbols in a formula that are: - Either the only symbol in a clause - Or all other literals in that clause have been assigned False This has the following steps: 1. Find symbols that are the only occurrences in a clause. 2. Find symbols in a clause where all other literals are assigned False. 3. Assign True or False depending on whether the symbols occurs in normal or complemented form respectively. >>> clause1 = Clause(["A4", "A3", "A5'", "A1", "A3'"]) >>> clause2 = Clause(["A4"]) >>> clause3 = Clause(["A3"]) >>> clauses, symbols = generate_parameters(Formula([clause1, clause2, clause3])) >>> unit_clauses, values = find_unit_clauses(clauses, {}) >>> unit_clauses ['A4', 'A3'] >>> values {'A4': True, 'A3': True} """ unit_symbols = [] for clause in clauses: if len(clause) == 1: unit_symbols.append(list(clause.literals.keys())[0]) else: Fcount, Ncount = 0, 0 for literal, value in clause.literals.items(): if value is False: Fcount += 1 elif value is None: sym = literal Ncount += 1 if Fcount == len(clause) - 1 and Ncount == 1: unit_symbols.append(sym) assignment: dict[str, bool | None] = dict() for i in unit_symbols: symbol = i[:2] assignment[symbol] = len(i) == 2 unit_symbols = [i[:2] for i in unit_symbols] return unit_symbols, assignment def dpll_algorithm( clauses: list[Clause], symbols: list[str], model: dict[str, bool | None] ) -> tuple[bool | None, dict[str, bool | None] | None]: """ Returns the model if the formula is satisfiable, else None This has the following steps: 1. If every clause in clauses is True, return True. 2. If some clause in clauses is False, return False. 3. Find pure symbols. 4. Find unit symbols. >>> formula = Formula([Clause(["A4", "A3", "A5'", "A1", "A3'"]), Clause(["A4"])]) >>> clauses, symbols = generate_parameters(formula) >>> soln, model = dpll_algorithm(clauses, symbols, {}) >>> soln True >>> model {'A4': True} """ check_clause_all_true = True for clause in clauses: clause_check = clause.evaluate(model) if clause_check is False: return False, None elif clause_check is None: check_clause_all_true = False continue if check_clause_all_true: return True, model try: pure_symbols, assignment = find_pure_symbols(clauses, symbols, model) except RecursionError: print("raises a RecursionError and is") return None, {} P = None if len(pure_symbols) > 0: P, value = pure_symbols[0], assignment[pure_symbols[0]] if P: tmp_model = model tmp_model[P] = value tmp_symbols = [i for i in symbols] if P in tmp_symbols: tmp_symbols.remove(P) return dpll_algorithm(clauses, tmp_symbols, tmp_model) unit_symbols, assignment = find_unit_clauses(clauses, model) P = None if len(unit_symbols) > 0: P, value = unit_symbols[0], assignment[unit_symbols[0]] if P: tmp_model = model tmp_model[P] = value tmp_symbols = [i for i in symbols] if P in tmp_symbols: tmp_symbols.remove(P) return dpll_algorithm(clauses, tmp_symbols, tmp_model) P = symbols[0] rest = symbols[1:] tmp1, tmp2 = model, model tmp1[P], tmp2[P] = True, False return dpll_algorithm(clauses, rest, tmp1) or dpll_algorithm(clauses, rest, tmp2) if __name__ == "__main__": import doctest doctest.testmod() formula = generate_formula() print(f"The formula {formula} is", end=" ") clauses, symbols = generate_parameters(formula) solution, model = dpll_algorithm(clauses, symbols, {}) if solution: print(f"satisfiable with the assignment {model}.") else: print("not satisfiable.")
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" python/black : True """ from __future__ import annotations def prime_factors(n: int) -> list[int]: """ Returns prime factors of n as a list. >>> prime_factors(0) [] >>> prime_factors(100) [2, 2, 5, 5] >>> prime_factors(2560) [2, 2, 2, 2, 2, 2, 2, 2, 2, 5] >>> prime_factors(10**-2) [] >>> prime_factors(0.02) [] >>> x = prime_factors(10**241) # doctest: +NORMALIZE_WHITESPACE >>> x == [2]*241 + [5]*241 True >>> prime_factors(10**-354) [] >>> prime_factors('hello') Traceback (most recent call last): ... TypeError: '<=' not supported between instances of 'int' and 'str' >>> prime_factors([1,2,'hello']) Traceback (most recent call last): ... TypeError: '<=' not supported between instances of 'int' and 'list' """ i = 2 factors = [] while i * i <= n: if n % i: i += 1 else: n //= i factors.append(i) if n > 1: factors.append(n) return factors if __name__ == "__main__": import doctest doctest.testmod()
""" python/black : True """ from __future__ import annotations def prime_factors(n: int) -> list[int]: """ Returns prime factors of n as a list. >>> prime_factors(0) [] >>> prime_factors(100) [2, 2, 5, 5] >>> prime_factors(2560) [2, 2, 2, 2, 2, 2, 2, 2, 2, 5] >>> prime_factors(10**-2) [] >>> prime_factors(0.02) [] >>> x = prime_factors(10**241) # doctest: +NORMALIZE_WHITESPACE >>> x == [2]*241 + [5]*241 True >>> prime_factors(10**-354) [] >>> prime_factors('hello') Traceback (most recent call last): ... TypeError: '<=' not supported between instances of 'int' and 'str' >>> prime_factors([1,2,'hello']) Traceback (most recent call last): ... TypeError: '<=' not supported between instances of 'int' and 'list' """ i = 2 factors = [] while i * i <= n: if n % i: i += 1 else: n //= i factors.append(i) if n > 1: factors.append(n) return factors if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from __future__ import annotations import random import string class ShuffledShiftCipher: """ This algorithm uses the Caesar Cipher algorithm but removes the option to use brute force to decrypt the message. The passcode is a a random password from the selection buffer of 1. uppercase letters of the English alphabet 2. lowercase letters of the English alphabet 3. digits from 0 to 9 Using unique characters from the passcode, the normal list of characters, that can be allowed in the plaintext, is pivoted and shuffled. Refer to docstring of __make_key_list() to learn more about the shuffling. Then, using the passcode, a number is calculated which is used to encrypt the plaintext message with the normal shift cipher method, only in this case, the reference, to look back at while decrypting, is shuffled. Each cipher object can possess an optional argument as passcode, without which a new passcode is generated for that object automatically. cip1 = ShuffledShiftCipher('d4usr9TWxw9wMD') cip2 = ShuffledShiftCipher() """ def __init__(self, passcode: str | None = None) -> None: """ Initializes a cipher object with a passcode as it's entity Note: No new passcode is generated if user provides a passcode while creating the object """ self.__passcode = passcode or self.__passcode_creator() self.__key_list = self.__make_key_list() self.__shift_key = self.__make_shift_key() def __str__(self) -> str: """ :return: passcode of the cipher object """ return "Passcode is: " + "".join(self.__passcode) def __neg_pos(self, iterlist: list[int]) -> list[int]: """ Mutates the list by changing the sign of each alternate element :param iterlist: takes a list iterable :return: the mutated list """ for i in range(1, len(iterlist), 2): iterlist[i] *= -1 return iterlist def __passcode_creator(self) -> list[str]: """ Creates a random password from the selection buffer of 1. uppercase letters of the English alphabet 2. lowercase letters of the English alphabet 3. digits from 0 to 9 :rtype: list :return: a password of a random length between 10 to 20 """ choices = string.ascii_letters + string.digits password = [random.choice(choices) for _ in range(random.randint(10, 20))] return password def __make_key_list(self) -> list[str]: """ Shuffles the ordered character choices by pivoting at breakpoints Breakpoints are the set of characters in the passcode eg: if, ABCDEFGHIJKLMNOPQRSTUVWXYZ are the possible characters and CAMERA is the passcode then, breakpoints = [A,C,E,M,R] # sorted set of characters from passcode shuffled parts: [A,CB,ED,MLKJIHGF,RQPON,ZYXWVUTS] shuffled __key_list : ACBEDMLKJIHGFRQPONZYXWVUTS Shuffling only 26 letters of the english alphabet can generate 26! combinations for the shuffled list. In the program we consider, a set of 97 characters (including letters, digits, punctuation and whitespaces), thereby creating a possibility of 97! combinations (which is a 152 digit number in itself), thus diminishing the possibility of a brute force approach. Moreover, shift keys even introduce a multiple of 26 for a brute force approach for each of the already 97! combinations. """ # key_list_options contain nearly all printable except few elements from # string.whitespace key_list_options = ( string.ascii_letters + string.digits + string.punctuation + " \t\n" ) keys_l = [] # creates points known as breakpoints to break the key_list_options at those # points and pivot each substring breakpoints = sorted(set(self.__passcode)) temp_list: list[str] = [] # algorithm for creating a new shuffled list, keys_l, out of key_list_options for i in key_list_options: temp_list.extend(i) # checking breakpoints at which to pivot temporary sublist and add it into # keys_l if i in breakpoints or i == key_list_options[-1]: keys_l.extend(temp_list[::-1]) temp_list.clear() # returning a shuffled keys_l to prevent brute force guessing of shift key return keys_l def __make_shift_key(self) -> int: """ sum() of the mutated list of ascii values of all characters where the mutated list is the one returned by __neg_pos() """ num = sum(self.__neg_pos([ord(x) for x in self.__passcode])) return num if num > 0 else len(self.__passcode) def decrypt(self, encoded_message: str) -> str: """ Performs shifting of the encoded_message w.r.t. the shuffled __key_list to create the decoded_message >>> ssc = ShuffledShiftCipher('4PYIXyqeQZr44') >>> ssc.decrypt("d>**-1z6&'5z'5z:z+-='$'>=zp:>5:#z<'.&>#") 'Hello, this is a modified Caesar cipher' """ decoded_message = "" # decoding shift like Caesar cipher algorithm implementing negative shift or # reverse shift or left shift for i in encoded_message: position = self.__key_list.index(i) decoded_message += self.__key_list[ (position - self.__shift_key) % -len(self.__key_list) ] return decoded_message def encrypt(self, plaintext: str) -> str: """ Performs shifting of the plaintext w.r.t. the shuffled __key_list to create the encoded_message >>> ssc = ShuffledShiftCipher('4PYIXyqeQZr44') >>> ssc.encrypt('Hello, this is a modified Caesar cipher') "d>**-1z6&'5z'5z:z+-='$'>=zp:>5:#z<'.&>#" """ encoded_message = "" # encoding shift like Caesar cipher algorithm implementing positive shift or # forward shift or right shift for i in plaintext: position = self.__key_list.index(i) encoded_message += self.__key_list[ (position + self.__shift_key) % len(self.__key_list) ] return encoded_message def test_end_to_end(msg: str = "Hello, this is a modified Caesar cipher") -> str: """ >>> test_end_to_end() 'Hello, this is a modified Caesar cipher' """ cip1 = ShuffledShiftCipher() return cip1.decrypt(cip1.encrypt(msg)) if __name__ == "__main__": import doctest doctest.testmod()
from __future__ import annotations import random import string class ShuffledShiftCipher: """ This algorithm uses the Caesar Cipher algorithm but removes the option to use brute force to decrypt the message. The passcode is a a random password from the selection buffer of 1. uppercase letters of the English alphabet 2. lowercase letters of the English alphabet 3. digits from 0 to 9 Using unique characters from the passcode, the normal list of characters, that can be allowed in the plaintext, is pivoted and shuffled. Refer to docstring of __make_key_list() to learn more about the shuffling. Then, using the passcode, a number is calculated which is used to encrypt the plaintext message with the normal shift cipher method, only in this case, the reference, to look back at while decrypting, is shuffled. Each cipher object can possess an optional argument as passcode, without which a new passcode is generated for that object automatically. cip1 = ShuffledShiftCipher('d4usr9TWxw9wMD') cip2 = ShuffledShiftCipher() """ def __init__(self, passcode: str | None = None) -> None: """ Initializes a cipher object with a passcode as it's entity Note: No new passcode is generated if user provides a passcode while creating the object """ self.__passcode = passcode or self.__passcode_creator() self.__key_list = self.__make_key_list() self.__shift_key = self.__make_shift_key() def __str__(self) -> str: """ :return: passcode of the cipher object """ return "Passcode is: " + "".join(self.__passcode) def __neg_pos(self, iterlist: list[int]) -> list[int]: """ Mutates the list by changing the sign of each alternate element :param iterlist: takes a list iterable :return: the mutated list """ for i in range(1, len(iterlist), 2): iterlist[i] *= -1 return iterlist def __passcode_creator(self) -> list[str]: """ Creates a random password from the selection buffer of 1. uppercase letters of the English alphabet 2. lowercase letters of the English alphabet 3. digits from 0 to 9 :rtype: list :return: a password of a random length between 10 to 20 """ choices = string.ascii_letters + string.digits password = [random.choice(choices) for _ in range(random.randint(10, 20))] return password def __make_key_list(self) -> list[str]: """ Shuffles the ordered character choices by pivoting at breakpoints Breakpoints are the set of characters in the passcode eg: if, ABCDEFGHIJKLMNOPQRSTUVWXYZ are the possible characters and CAMERA is the passcode then, breakpoints = [A,C,E,M,R] # sorted set of characters from passcode shuffled parts: [A,CB,ED,MLKJIHGF,RQPON,ZYXWVUTS] shuffled __key_list : ACBEDMLKJIHGFRQPONZYXWVUTS Shuffling only 26 letters of the english alphabet can generate 26! combinations for the shuffled list. In the program we consider, a set of 97 characters (including letters, digits, punctuation and whitespaces), thereby creating a possibility of 97! combinations (which is a 152 digit number in itself), thus diminishing the possibility of a brute force approach. Moreover, shift keys even introduce a multiple of 26 for a brute force approach for each of the already 97! combinations. """ # key_list_options contain nearly all printable except few elements from # string.whitespace key_list_options = ( string.ascii_letters + string.digits + string.punctuation + " \t\n" ) keys_l = [] # creates points known as breakpoints to break the key_list_options at those # points and pivot each substring breakpoints = sorted(set(self.__passcode)) temp_list: list[str] = [] # algorithm for creating a new shuffled list, keys_l, out of key_list_options for i in key_list_options: temp_list.extend(i) # checking breakpoints at which to pivot temporary sublist and add it into # keys_l if i in breakpoints or i == key_list_options[-1]: keys_l.extend(temp_list[::-1]) temp_list.clear() # returning a shuffled keys_l to prevent brute force guessing of shift key return keys_l def __make_shift_key(self) -> int: """ sum() of the mutated list of ascii values of all characters where the mutated list is the one returned by __neg_pos() """ num = sum(self.__neg_pos([ord(x) for x in self.__passcode])) return num if num > 0 else len(self.__passcode) def decrypt(self, encoded_message: str) -> str: """ Performs shifting of the encoded_message w.r.t. the shuffled __key_list to create the decoded_message >>> ssc = ShuffledShiftCipher('4PYIXyqeQZr44') >>> ssc.decrypt("d>**-1z6&'5z'5z:z+-='$'>=zp:>5:#z<'.&>#") 'Hello, this is a modified Caesar cipher' """ decoded_message = "" # decoding shift like Caesar cipher algorithm implementing negative shift or # reverse shift or left shift for i in encoded_message: position = self.__key_list.index(i) decoded_message += self.__key_list[ (position - self.__shift_key) % -len(self.__key_list) ] return decoded_message def encrypt(self, plaintext: str) -> str: """ Performs shifting of the plaintext w.r.t. the shuffled __key_list to create the encoded_message >>> ssc = ShuffledShiftCipher('4PYIXyqeQZr44') >>> ssc.encrypt('Hello, this is a modified Caesar cipher') "d>**-1z6&'5z'5z:z+-='$'>=zp:>5:#z<'.&>#" """ encoded_message = "" # encoding shift like Caesar cipher algorithm implementing positive shift or # forward shift or right shift for i in plaintext: position = self.__key_list.index(i) encoded_message += self.__key_list[ (position + self.__shift_key) % len(self.__key_list) ] return encoded_message def test_end_to_end(msg: str = "Hello, this is a modified Caesar cipher") -> str: """ >>> test_end_to_end() 'Hello, this is a modified Caesar cipher' """ cip1 = ShuffledShiftCipher() return cip1.decrypt(cip1.encrypt(msg)) if __name__ == "__main__": import doctest doctest.testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
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-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Pure Python implementations of a Fixed Priority Queue and an Element Priority Queue using Python lists. """ class OverFlowError(Exception): pass class UnderFlowError(Exception): pass class FixedPriorityQueue: """ Tasks can be added to a Priority Queue at any time and in any order but when Tasks are removed then the Task with the highest priority is removed in FIFO order. In code we will use three levels of priority with priority zero Tasks being the most urgent (high priority) and priority 2 tasks being the least urgent. Examples >>> fpq = FixedPriorityQueue() >>> fpq.enqueue(0, 10) >>> fpq.enqueue(1, 70) >>> fpq.enqueue(0, 100) >>> fpq.enqueue(2, 1) >>> fpq.enqueue(2, 5) >>> fpq.enqueue(1, 7) >>> fpq.enqueue(2, 4) >>> fpq.enqueue(1, 64) >>> fpq.enqueue(0, 128) >>> print(fpq) Priority 0: [10, 100, 128] Priority 1: [70, 7, 64] Priority 2: [1, 5, 4] >>> fpq.dequeue() 10 >>> fpq.dequeue() 100 >>> fpq.dequeue() 128 >>> fpq.dequeue() 70 >>> fpq.dequeue() 7 >>> print(fpq) Priority 0: [] Priority 1: [64] Priority 2: [1, 5, 4] >>> fpq.dequeue() 64 >>> fpq.dequeue() 1 >>> fpq.dequeue() 5 >>> fpq.dequeue() 4 >>> fpq.dequeue() Traceback (most recent call last): ... data_structures.queue.priority_queue_using_list.UnderFlowError: All queues are empty >>> print(fpq) Priority 0: [] Priority 1: [] Priority 2: [] """ def __init__(self): self.queues = [ [], [], [], ] def enqueue(self, priority: int, data: int) -> None: """ Add an element to a queue based on its priority. If the priority is invalid ValueError is raised. If the queue is full an OverFlowError is raised. """ try: if len(self.queues[priority]) >= 100: raise OverflowError("Maximum queue size is 100") self.queues[priority].append(data) except IndexError: raise ValueError("Valid priorities are 0, 1, and 2") def dequeue(self) -> int: """ Return the highest priority element in FIFO order. If the queue is empty then an under flow exception is raised. """ for queue in self.queues: if queue: return queue.pop(0) raise UnderFlowError("All queues are empty") def __str__(self) -> str: return "\n".join(f"Priority {i}: {q}" for i, q in enumerate(self.queues)) class ElementPriorityQueue: """ Element Priority Queue is the same as Fixed Priority Queue except that the value of the element itself is the priority. The rules for priorities are the same the as Fixed Priority Queue. >>> epq = ElementPriorityQueue() >>> epq.enqueue(10) >>> epq.enqueue(70) >>> epq.enqueue(4) >>> epq.enqueue(1) >>> epq.enqueue(5) >>> epq.enqueue(7) >>> epq.enqueue(4) >>> epq.enqueue(64) >>> epq.enqueue(128) >>> print(epq) [10, 70, 4, 1, 5, 7, 4, 64, 128] >>> epq.dequeue() 1 >>> epq.dequeue() 4 >>> epq.dequeue() 4 >>> epq.dequeue() 5 >>> epq.dequeue() 7 >>> epq.dequeue() 10 >>> print(epq) [70, 64, 128] >>> epq.dequeue() 64 >>> epq.dequeue() 70 >>> epq.dequeue() 128 >>> epq.dequeue() Traceback (most recent call last): ... data_structures.queue.priority_queue_using_list.UnderFlowError: The queue is empty >>> print(epq) [] """ def __init__(self): self.queue = [] def enqueue(self, data: int) -> None: """ This function enters the element into the queue If the queue is full an Exception is raised saying Over Flow! """ if len(self.queue) == 100: raise OverFlowError("Maximum queue size is 100") self.queue.append(data) def dequeue(self) -> int: """ Return the highest priority element in FIFO order. If the queue is empty then an under flow exception is raised. """ if not self.queue: raise UnderFlowError("The queue is empty") else: data = min(self.queue) self.queue.remove(data) return data def __str__(self) -> str: """ Prints all the elements within the Element Priority Queue """ return str(self.queue) def fixed_priority_queue(): fpq = FixedPriorityQueue() fpq.enqueue(0, 10) fpq.enqueue(1, 70) fpq.enqueue(0, 100) fpq.enqueue(2, 1) fpq.enqueue(2, 5) fpq.enqueue(1, 7) fpq.enqueue(2, 4) fpq.enqueue(1, 64) fpq.enqueue(0, 128) print(fpq) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) def element_priority_queue(): epq = ElementPriorityQueue() epq.enqueue(10) epq.enqueue(70) epq.enqueue(100) epq.enqueue(1) epq.enqueue(5) epq.enqueue(7) epq.enqueue(4) epq.enqueue(64) epq.enqueue(128) print(epq) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) if __name__ == "__main__": fixed_priority_queue() element_priority_queue()
""" Pure Python implementations of a Fixed Priority Queue and an Element Priority Queue using Python lists. """ class OverFlowError(Exception): pass class UnderFlowError(Exception): pass class FixedPriorityQueue: """ Tasks can be added to a Priority Queue at any time and in any order but when Tasks are removed then the Task with the highest priority is removed in FIFO order. In code we will use three levels of priority with priority zero Tasks being the most urgent (high priority) and priority 2 tasks being the least urgent. Examples >>> fpq = FixedPriorityQueue() >>> fpq.enqueue(0, 10) >>> fpq.enqueue(1, 70) >>> fpq.enqueue(0, 100) >>> fpq.enqueue(2, 1) >>> fpq.enqueue(2, 5) >>> fpq.enqueue(1, 7) >>> fpq.enqueue(2, 4) >>> fpq.enqueue(1, 64) >>> fpq.enqueue(0, 128) >>> print(fpq) Priority 0: [10, 100, 128] Priority 1: [70, 7, 64] Priority 2: [1, 5, 4] >>> fpq.dequeue() 10 >>> fpq.dequeue() 100 >>> fpq.dequeue() 128 >>> fpq.dequeue() 70 >>> fpq.dequeue() 7 >>> print(fpq) Priority 0: [] Priority 1: [64] Priority 2: [1, 5, 4] >>> fpq.dequeue() 64 >>> fpq.dequeue() 1 >>> fpq.dequeue() 5 >>> fpq.dequeue() 4 >>> fpq.dequeue() Traceback (most recent call last): ... data_structures.queue.priority_queue_using_list.UnderFlowError: All queues are empty >>> print(fpq) Priority 0: [] Priority 1: [] Priority 2: [] """ def __init__(self): self.queues = [ [], [], [], ] def enqueue(self, priority: int, data: int) -> None: """ Add an element to a queue based on its priority. If the priority is invalid ValueError is raised. If the queue is full an OverFlowError is raised. """ try: if len(self.queues[priority]) >= 100: raise OverflowError("Maximum queue size is 100") self.queues[priority].append(data) except IndexError: raise ValueError("Valid priorities are 0, 1, and 2") def dequeue(self) -> int: """ Return the highest priority element in FIFO order. If the queue is empty then an under flow exception is raised. """ for queue in self.queues: if queue: return queue.pop(0) raise UnderFlowError("All queues are empty") def __str__(self) -> str: return "\n".join(f"Priority {i}: {q}" for i, q in enumerate(self.queues)) class ElementPriorityQueue: """ Element Priority Queue is the same as Fixed Priority Queue except that the value of the element itself is the priority. The rules for priorities are the same the as Fixed Priority Queue. >>> epq = ElementPriorityQueue() >>> epq.enqueue(10) >>> epq.enqueue(70) >>> epq.enqueue(4) >>> epq.enqueue(1) >>> epq.enqueue(5) >>> epq.enqueue(7) >>> epq.enqueue(4) >>> epq.enqueue(64) >>> epq.enqueue(128) >>> print(epq) [10, 70, 4, 1, 5, 7, 4, 64, 128] >>> epq.dequeue() 1 >>> epq.dequeue() 4 >>> epq.dequeue() 4 >>> epq.dequeue() 5 >>> epq.dequeue() 7 >>> epq.dequeue() 10 >>> print(epq) [70, 64, 128] >>> epq.dequeue() 64 >>> epq.dequeue() 70 >>> epq.dequeue() 128 >>> epq.dequeue() Traceback (most recent call last): ... data_structures.queue.priority_queue_using_list.UnderFlowError: The queue is empty >>> print(epq) [] """ def __init__(self): self.queue = [] def enqueue(self, data: int) -> None: """ This function enters the element into the queue If the queue is full an Exception is raised saying Over Flow! """ if len(self.queue) == 100: raise OverFlowError("Maximum queue size is 100") self.queue.append(data) def dequeue(self) -> int: """ Return the highest priority element in FIFO order. If the queue is empty then an under flow exception is raised. """ if not self.queue: raise UnderFlowError("The queue is empty") else: data = min(self.queue) self.queue.remove(data) return data def __str__(self) -> str: """ Prints all the elements within the Element Priority Queue """ return str(self.queue) def fixed_priority_queue(): fpq = FixedPriorityQueue() fpq.enqueue(0, 10) fpq.enqueue(1, 70) fpq.enqueue(0, 100) fpq.enqueue(2, 1) fpq.enqueue(2, 5) fpq.enqueue(1, 7) fpq.enqueue(2, 4) fpq.enqueue(1, 64) fpq.enqueue(0, 128) print(fpq) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) print(fpq.dequeue()) def element_priority_queue(): epq = ElementPriorityQueue() epq.enqueue(10) epq.enqueue(70) epq.enqueue(100) epq.enqueue(1) epq.enqueue(5) epq.enqueue(7) epq.enqueue(4) epq.enqueue(64) epq.enqueue(128) print(epq) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) print(epq.dequeue()) if __name__ == "__main__": fixed_priority_queue() element_priority_queue()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import unittest from timeit import timeit def least_common_multiple_slow(first_num: int, second_num: int) -> int: """ Find the least common multiple of two numbers. Learn more: https://en.wikipedia.org/wiki/Least_common_multiple >>> least_common_multiple_slow(5, 2) 10 >>> least_common_multiple_slow(12, 76) 228 """ max_num = first_num if first_num >= second_num else second_num common_mult = max_num while (common_mult % first_num > 0) or (common_mult % second_num > 0): common_mult += max_num return common_mult def greatest_common_divisor(a: int, b: int) -> int: """ Calculate Greatest Common Divisor (GCD). see greatest_common_divisor.py >>> greatest_common_divisor(24, 40) 8 >>> greatest_common_divisor(1, 1) 1 >>> greatest_common_divisor(1, 800) 1 >>> greatest_common_divisor(11, 37) 1 >>> greatest_common_divisor(3, 5) 1 >>> greatest_common_divisor(16, 4) 4 """ return b if a == 0 else greatest_common_divisor(b % a, a) def least_common_multiple_fast(first_num: int, second_num: int) -> int: """ Find the least common multiple of two numbers. https://en.wikipedia.org/wiki/Least_common_multiple#Using_the_greatest_common_divisor >>> least_common_multiple_fast(5,2) 10 >>> least_common_multiple_fast(12,76) 228 """ return first_num // greatest_common_divisor(first_num, second_num) * second_num def benchmark(): setup = ( "from __main__ import least_common_multiple_slow, least_common_multiple_fast" ) print( "least_common_multiple_slow():", timeit("least_common_multiple_slow(1000, 999)", setup=setup), ) print( "least_common_multiple_fast():", timeit("least_common_multiple_fast(1000, 999)", setup=setup), ) class TestLeastCommonMultiple(unittest.TestCase): test_inputs = [ (10, 20), (13, 15), (4, 31), (10, 42), (43, 34), (5, 12), (12, 25), (10, 25), (6, 9), ] expected_results = [20, 195, 124, 210, 1462, 60, 300, 50, 18] def test_lcm_function(self): for i, (first_num, second_num) in enumerate(self.test_inputs): slow_result = least_common_multiple_slow(first_num, second_num) fast_result = least_common_multiple_fast(first_num, second_num) with self.subTest(i=i): self.assertEqual(slow_result, self.expected_results[i]) self.assertEqual(fast_result, self.expected_results[i]) if __name__ == "__main__": benchmark() unittest.main()
import unittest from timeit import timeit def least_common_multiple_slow(first_num: int, second_num: int) -> int: """ Find the least common multiple of two numbers. Learn more: https://en.wikipedia.org/wiki/Least_common_multiple >>> least_common_multiple_slow(5, 2) 10 >>> least_common_multiple_slow(12, 76) 228 """ max_num = first_num if first_num >= second_num else second_num common_mult = max_num while (common_mult % first_num > 0) or (common_mult % second_num > 0): common_mult += max_num return common_mult def greatest_common_divisor(a: int, b: int) -> int: """ Calculate Greatest Common Divisor (GCD). see greatest_common_divisor.py >>> greatest_common_divisor(24, 40) 8 >>> greatest_common_divisor(1, 1) 1 >>> greatest_common_divisor(1, 800) 1 >>> greatest_common_divisor(11, 37) 1 >>> greatest_common_divisor(3, 5) 1 >>> greatest_common_divisor(16, 4) 4 """ return b if a == 0 else greatest_common_divisor(b % a, a) def least_common_multiple_fast(first_num: int, second_num: int) -> int: """ Find the least common multiple of two numbers. https://en.wikipedia.org/wiki/Least_common_multiple#Using_the_greatest_common_divisor >>> least_common_multiple_fast(5,2) 10 >>> least_common_multiple_fast(12,76) 228 """ return first_num // greatest_common_divisor(first_num, second_num) * second_num def benchmark(): setup = ( "from __main__ import least_common_multiple_slow, least_common_multiple_fast" ) print( "least_common_multiple_slow():", timeit("least_common_multiple_slow(1000, 999)", setup=setup), ) print( "least_common_multiple_fast():", timeit("least_common_multiple_fast(1000, 999)", setup=setup), ) class TestLeastCommonMultiple(unittest.TestCase): test_inputs = [ (10, 20), (13, 15), (4, 31), (10, 42), (43, 34), (5, 12), (12, 25), (10, 25), (6, 9), ] expected_results = [20, 195, 124, 210, 1462, 60, 300, 50, 18] def test_lcm_function(self): for i, (first_num, second_num) in enumerate(self.test_inputs): slow_result = least_common_multiple_slow(first_num, second_num) fast_result = least_common_multiple_fast(first_num, second_num) with self.subTest(i=i): self.assertEqual(slow_result, self.expected_results[i]) self.assertEqual(fast_result, self.expected_results[i]) if __name__ == "__main__": benchmark() unittest.main()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Isolate the Decimal part of a Number https://stackoverflow.com/questions/3886402/how-to-get-numbers-after-decimal-point """ def decimal_isolate(number, digitAmount): """ Isolates the decimal part of a number. If digitAmount > 0 round to that decimal place, else print the entire decimal. >>> decimal_isolate(1.53, 0) 0.53 >>> decimal_isolate(35.345, 1) 0.3 >>> decimal_isolate(35.345, 2) 0.34 >>> decimal_isolate(35.345, 3) 0.345 >>> decimal_isolate(-14.789, 3) -0.789 >>> decimal_isolate(0, 2) 0 >>> decimal_isolate(-14.123, 1) -0.1 >>> decimal_isolate(-14.123, 2) -0.12 >>> decimal_isolate(-14.123, 3) -0.123 """ if digitAmount > 0: return round(number - int(number), digitAmount) return number - int(number) if __name__ == "__main__": print(decimal_isolate(1.53, 0)) print(decimal_isolate(35.345, 1)) print(decimal_isolate(35.345, 2)) print(decimal_isolate(35.345, 3)) print(decimal_isolate(-14.789, 3)) print(decimal_isolate(0, 2)) print(decimal_isolate(-14.123, 1)) print(decimal_isolate(-14.123, 2)) print(decimal_isolate(-14.123, 3))
""" Isolate the Decimal part of a Number https://stackoverflow.com/questions/3886402/how-to-get-numbers-after-decimal-point """ def decimal_isolate(number, digitAmount): """ Isolates the decimal part of a number. If digitAmount > 0 round to that decimal place, else print the entire decimal. >>> decimal_isolate(1.53, 0) 0.53 >>> decimal_isolate(35.345, 1) 0.3 >>> decimal_isolate(35.345, 2) 0.34 >>> decimal_isolate(35.345, 3) 0.345 >>> decimal_isolate(-14.789, 3) -0.789 >>> decimal_isolate(0, 2) 0 >>> decimal_isolate(-14.123, 1) -0.1 >>> decimal_isolate(-14.123, 2) -0.12 >>> decimal_isolate(-14.123, 3) -0.123 """ if digitAmount > 0: return round(number - int(number), digitAmount) return number - int(number) if __name__ == "__main__": print(decimal_isolate(1.53, 0)) print(decimal_isolate(35.345, 1)) print(decimal_isolate(35.345, 2)) print(decimal_isolate(35.345, 3)) print(decimal_isolate(-14.789, 3)) print(decimal_isolate(0, 2)) print(decimal_isolate(-14.123, 1)) print(decimal_isolate(-14.123, 2)) print(decimal_isolate(-14.123, 3))
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def binary_recursive(decimal: int) -> str: """ Take a positive integer value and return its binary equivalent. >>> binary_recursive(1000) '1111101000' >>> binary_recursive("72") '1001000' >>> binary_recursive("number") Traceback (most recent call last): ... ValueError: invalid literal for int() with base 10: 'number' """ decimal = int(decimal) if decimal in (0, 1): # Exit cases for the recursion return str(decimal) div, mod = divmod(decimal, 2) return binary_recursive(div) + str(mod) def main(number: str) -> str: """ Take an integer value and raise ValueError for wrong inputs, call the function above and return the output with prefix "0b" & "-0b" for positive and negative integers respectively. >>> main(0) '0b0' >>> main(40) '0b101000' >>> main(-40) '-0b101000' >>> main(40.8) Traceback (most recent call last): ... ValueError: Input value is not an integer >>> main("forty") Traceback (most recent call last): ... ValueError: Input value is not an integer """ number = str(number).strip() if not number: raise ValueError("No input value was provided") negative = "-" if number.startswith("-") else "" number = number.lstrip("-") if not number.isnumeric(): raise ValueError("Input value is not an integer") return f"{negative}0b{binary_recursive(int(number))}" if __name__ == "__main__": from doctest import testmod testmod()
def binary_recursive(decimal: int) -> str: """ Take a positive integer value and return its binary equivalent. >>> binary_recursive(1000) '1111101000' >>> binary_recursive("72") '1001000' >>> binary_recursive("number") Traceback (most recent call last): ... ValueError: invalid literal for int() with base 10: 'number' """ decimal = int(decimal) if decimal in (0, 1): # Exit cases for the recursion return str(decimal) div, mod = divmod(decimal, 2) return binary_recursive(div) + str(mod) def main(number: str) -> str: """ Take an integer value and raise ValueError for wrong inputs, call the function above and return the output with prefix "0b" & "-0b" for positive and negative integers respectively. >>> main(0) '0b0' >>> main(40) '0b101000' >>> main(-40) '-0b101000' >>> main(40.8) Traceback (most recent call last): ... ValueError: Input value is not an integer >>> main("forty") Traceback (most recent call last): ... ValueError: Input value is not an integer """ number = str(number).strip() if not number: raise ValueError("No input value was provided") negative = "-" if number.startswith("-") else "" number = number.lstrip("-") if not number.isnumeric(): raise ValueError("Input value is not an integer") return f"{negative}0b{binary_recursive(int(number))}" if __name__ == "__main__": from doctest import testmod testmod()
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/bin/sh # # An example hook script to make use of push options. # The example simply echoes all push options that start with 'echoback=' # and rejects all pushes when the "reject" push option is used. # # To enable this hook, rename this file to "pre-receive". if test -n "$GIT_PUSH_OPTION_COUNT" then i=0 while test "$i" -lt "$GIT_PUSH_OPTION_COUNT" do eval "value=\$GIT_PUSH_OPTION_$i" case "$value" in echoback=*) echo "echo from the pre-receive-hook: ${value#*=}" >&2 ;; reject) exit 1 esac i=$((i + 1)) done fi
#!/bin/sh # # An example hook script to make use of push options. # The example simply echoes all push options that start with 'echoback=' # and rejects all pushes when the "reject" push option is used. # # To enable this hook, rename this file to "pre-receive". if test -n "$GIT_PUSH_OPTION_COUNT" then i=0 while test "$i" -lt "$GIT_PUSH_OPTION_COUNT" do eval "value=\$GIT_PUSH_OPTION_$i" case "$value" in echoback=*) echo "echo from the pre-receive-hook: ${value#*=}" >&2 ;; reject) exit 1 esac i=$((i + 1)) done fi
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,808
[mypy] Fix `matrix_operation.py`
### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-10T14:32:23Z"
"2021-11-10T15:22:52Z"
d6a1623448f2494fbb21116b6bc699dccb0401b2
e9882e41ba7a1d1fbdc12362a522a1b646497192
[mypy] Fix `matrix_operation.py`. ### Describe your change: Related to #4052 Replacement for #5806 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
from __future__ import annotations def kmp(pattern: str, text: str) -> bool: """ The Knuth-Morris-Pratt Algorithm for finding a pattern within a piece of text with complexity O(n + m) 1) Preprocess pattern to identify any suffixes that are identical to prefixes This tells us where to continue from if we get a mismatch between a character in our pattern and the text. 2) Step through the text one character at a time and compare it to a character in the pattern updating our location within the pattern if necessary """ # 1) Construct the failure array failure = get_failure_array(pattern) # 2) Step through text searching for pattern i, j = 0, 0 # index into text, pattern while i < len(text): if pattern[j] == text[i]: if j == (len(pattern) - 1): return True j += 1 # if this is a prefix in our pattern # just go back far enough to continue elif j > 0: j = failure[j - 1] continue i += 1 return False def get_failure_array(pattern: str) -> list[int]: """ Calculates the new index we should go to if we fail a comparison :param pattern: :return: """ failure = [0] i = 0 j = 1 while j < len(pattern): if pattern[i] == pattern[j]: i += 1 elif i > 0: i = failure[i - 1] continue j += 1 failure.append(i) return failure if __name__ == "__main__": # Test 1) pattern = "abc1abc12" text1 = "alskfjaldsabc1abc1abc12k23adsfabcabc" text2 = "alskfjaldsk23adsfabcabc" assert kmp(pattern, text1) and not kmp(pattern, text2) # Test 2) pattern = "ABABX" text = "ABABZABABYABABX" assert kmp(pattern, text) # Test 3) pattern = "AAAB" text = "ABAAAAAB" assert kmp(pattern, text) # Test 4) pattern = "abcdabcy" text = "abcxabcdabxabcdabcdabcy" assert kmp(pattern, text) # Test 5) pattern = "aabaabaaa" assert get_failure_array(pattern) == [0, 1, 0, 1, 2, 3, 4, 5, 2]
from __future__ import annotations def kmp(pattern: str, text: str) -> bool: """ The Knuth-Morris-Pratt Algorithm for finding a pattern within a piece of text with complexity O(n + m) 1) Preprocess pattern to identify any suffixes that are identical to prefixes This tells us where to continue from if we get a mismatch between a character in our pattern and the text. 2) Step through the text one character at a time and compare it to a character in the pattern updating our location within the pattern if necessary """ # 1) Construct the failure array failure = get_failure_array(pattern) # 2) Step through text searching for pattern i, j = 0, 0 # index into text, pattern while i < len(text): if pattern[j] == text[i]: if j == (len(pattern) - 1): return True j += 1 # if this is a prefix in our pattern # just go back far enough to continue elif j > 0: j = failure[j - 1] continue i += 1 return False def get_failure_array(pattern: str) -> list[int]: """ Calculates the new index we should go to if we fail a comparison :param pattern: :return: """ failure = [0] i = 0 j = 1 while j < len(pattern): if pattern[i] == pattern[j]: i += 1 elif i > 0: i = failure[i - 1] continue j += 1 failure.append(i) return failure if __name__ == "__main__": # Test 1) pattern = "abc1abc12" text1 = "alskfjaldsabc1abc1abc12k23adsfabcabc" text2 = "alskfjaldsk23adsfabcabc" assert kmp(pattern, text1) and not kmp(pattern, text2) # Test 2) pattern = "ABABX" text = "ABABZABABYABABX" assert kmp(pattern, text) # Test 3) pattern = "AAAB" text = "ABAAAAAB" assert kmp(pattern, text) # Test 4) pattern = "abcdabcy" text = "abcxabcdabxabcdabcdabcy" assert kmp(pattern, text) # Test 5) pattern = "aabaabaaa" assert get_failure_array(pattern) == [0, 1, 0, 1, 2, 3, 4, 5, 2]
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
[mypy] ignore_missing_imports = True install_types = True non_interactive = True exclude = (matrix_operation.py|other/least_recently_used.py|other/lfu_cache.py|other/lru_cache.py|searches/simulated_annealing.py|searches/ternary_search.py)
[mypy] ignore_missing_imports = True install_types = True non_interactive = True exclude = (matrix_operation.py|other/least_recently_used.py|other/lfu_cache.py|other/lru_cache.py)
1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# https://en.wikipedia.org/wiki/Simulated_annealing import math import random from .hill_climbing import SearchProblem def simulated_annealing( search_prob, find_max: bool = True, max_x: float = math.inf, min_x: float = -math.inf, max_y: float = math.inf, min_y: float = -math.inf, visualization: bool = False, start_temperate: float = 100, rate_of_decrease: float = 0.01, threshold_temp: float = 1, ) -> SearchProblem: """ Implementation of the simulated annealing algorithm. We start with a given state, find all its neighbors. Pick a random neighbor, if that neighbor improves the solution, we move in that direction, if that neighbor does not improve the solution, we generate a random real number between 0 and 1, if the number is within a certain range (calculated using temperature) we move in that direction, else we pick another neighbor randomly and repeat the process. Args: search_prob: The search state at the start. find_max: If True, the algorithm should find the minimum else the minimum. max_x, min_x, max_y, min_y: the maximum and minimum bounds of x and y. visualization: If True, a matplotlib graph is displayed. start_temperate: the initial temperate of the system when the program starts. rate_of_decrease: the rate at which the temperate decreases in each iteration. threshold_temp: the threshold temperature below which we end the search Returns a search state having the maximum (or minimum) score. """ search_end = False current_state = search_prob current_temp = start_temperate scores = [] iterations = 0 best_state = None while not search_end: current_score = current_state.score() if best_state is None or current_score > best_state.score(): best_state = current_state scores.append(current_score) iterations += 1 next_state = None neighbors = current_state.get_neighbors() while ( next_state is None and neighbors ): # till we do not find a neighbor that we can move to index = random.randint(0, len(neighbors) - 1) # picking a random neighbor picked_neighbor = neighbors.pop(index) change = picked_neighbor.score() - current_score if ( picked_neighbor.x > max_x or picked_neighbor.x < min_x or picked_neighbor.y > max_y or picked_neighbor.y < min_y ): continue # neighbor outside our bounds if not find_max: change = change * -1 # in case we are finding minimum if change > 0: # improves the solution next_state = picked_neighbor else: probability = (math.e) ** ( change / current_temp ) # probability generation function if random.random() < probability: # random number within probability next_state = picked_neighbor current_temp = current_temp - (current_temp * rate_of_decrease) if current_temp < threshold_temp or next_state is None: # temperature below threshold, or could not find a suitable neighbor search_end = True else: current_state = next_state if visualization: from matplotlib import pyplot as plt plt.plot(range(iterations), scores) plt.xlabel("Iterations") plt.ylabel("Function values") plt.show() return best_state if __name__ == "__main__": def test_f1(x, y): return (x ** 2) + (y ** 2) # starting the problem with initial coordinates (12, 47) prob = SearchProblem(x=12, y=47, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing( prob, find_max=False, max_x=100, min_x=5, max_y=50, min_y=-5, visualization=True ) print( "The minimum score for f(x, y) = x^2 + y^2 with the domain 100 > x > 5 " f"and 50 > y > - 5 found via hill climbing: {local_min.score()}" ) # starting the problem with initial coordinates (12, 47) prob = SearchProblem(x=12, y=47, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing( prob, find_max=True, max_x=100, min_x=5, max_y=50, min_y=-5, visualization=True ) print( "The maximum score for f(x, y) = x^2 + y^2 with the domain 100 > x > 5 " f"and 50 > y > - 5 found via hill climbing: {local_min.score()}" ) def test_f2(x, y): return (3 * x ** 2) - (6 * y) prob = SearchProblem(x=3, y=4, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing(prob, find_max=False, visualization=True) print( "The minimum score for f(x, y) = 3*x^2 - 6*y found via hill climbing: " f"{local_min.score()}" ) prob = SearchProblem(x=3, y=4, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing(prob, find_max=True, visualization=True) print( "The maximum score for f(x, y) = 3*x^2 - 6*y found via hill climbing: " f"{local_min.score()}" )
# https://en.wikipedia.org/wiki/Simulated_annealing import math import random from typing import Any from .hill_climbing import SearchProblem def simulated_annealing( search_prob, find_max: bool = True, max_x: float = math.inf, min_x: float = -math.inf, max_y: float = math.inf, min_y: float = -math.inf, visualization: bool = False, start_temperate: float = 100, rate_of_decrease: float = 0.01, threshold_temp: float = 1, ) -> Any: """ Implementation of the simulated annealing algorithm. We start with a given state, find all its neighbors. Pick a random neighbor, if that neighbor improves the solution, we move in that direction, if that neighbor does not improve the solution, we generate a random real number between 0 and 1, if the number is within a certain range (calculated using temperature) we move in that direction, else we pick another neighbor randomly and repeat the process. Args: search_prob: The search state at the start. find_max: If True, the algorithm should find the minimum else the minimum. max_x, min_x, max_y, min_y: the maximum and minimum bounds of x and y. visualization: If True, a matplotlib graph is displayed. start_temperate: the initial temperate of the system when the program starts. rate_of_decrease: the rate at which the temperate decreases in each iteration. threshold_temp: the threshold temperature below which we end the search Returns a search state having the maximum (or minimum) score. """ search_end = False current_state = search_prob current_temp = start_temperate scores = [] iterations = 0 best_state = None while not search_end: current_score = current_state.score() if best_state is None or current_score > best_state.score(): best_state = current_state scores.append(current_score) iterations += 1 next_state = None neighbors = current_state.get_neighbors() while ( next_state is None and neighbors ): # till we do not find a neighbor that we can move to index = random.randint(0, len(neighbors) - 1) # picking a random neighbor picked_neighbor = neighbors.pop(index) change = picked_neighbor.score() - current_score if ( picked_neighbor.x > max_x or picked_neighbor.x < min_x or picked_neighbor.y > max_y or picked_neighbor.y < min_y ): continue # neighbor outside our bounds if not find_max: change = change * -1 # in case we are finding minimum if change > 0: # improves the solution next_state = picked_neighbor else: probability = (math.e) ** ( change / current_temp ) # probability generation function if random.random() < probability: # random number within probability next_state = picked_neighbor current_temp = current_temp - (current_temp * rate_of_decrease) if current_temp < threshold_temp or next_state is None: # temperature below threshold, or could not find a suitable neighbor search_end = True else: current_state = next_state if visualization: from matplotlib import pyplot as plt plt.plot(range(iterations), scores) plt.xlabel("Iterations") plt.ylabel("Function values") plt.show() return best_state if __name__ == "__main__": def test_f1(x, y): return (x ** 2) + (y ** 2) # starting the problem with initial coordinates (12, 47) prob = SearchProblem(x=12, y=47, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing( prob, find_max=False, max_x=100, min_x=5, max_y=50, min_y=-5, visualization=True ) print( "The minimum score for f(x, y) = x^2 + y^2 with the domain 100 > x > 5 " f"and 50 > y > - 5 found via hill climbing: {local_min.score()}" ) # starting the problem with initial coordinates (12, 47) prob = SearchProblem(x=12, y=47, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing( prob, find_max=True, max_x=100, min_x=5, max_y=50, min_y=-5, visualization=True ) print( "The maximum score for f(x, y) = x^2 + y^2 with the domain 100 > x > 5 " f"and 50 > y > - 5 found via hill climbing: {local_min.score()}" ) def test_f2(x, y): return (3 * x ** 2) - (6 * y) prob = SearchProblem(x=3, y=4, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing(prob, find_max=False, visualization=True) print( "The minimum score for f(x, y) = 3*x^2 - 6*y found via hill climbing: " f"{local_min.score()}" ) prob = SearchProblem(x=3, y=4, step_size=1, function_to_optimize=test_f1) local_min = simulated_annealing(prob, find_max=True, visualization=True) print( "The maximum score for f(x, y) = 3*x^2 - 6*y found via hill climbing: " f"{local_min.score()}" )
1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" This is a type of divide and conquer algorithm which divides the search space into 3 parts and finds the target value based on the property of the array or list (usually monotonic property). Time Complexity : O(log3 N) Space Complexity : O(1) """ from __future__ import annotations # This is the precision for this function which can be altered. # It is recommended for users to keep this number greater than or equal to 10. precision = 10 # This is the linear search that will occur after the search space has become smaller. def lin_search(left: int, right: int, array: list[int], target: int) -> int: """Perform linear search in list. Returns -1 if element is not found. Parameters ---------- left : int left index bound. right : int right index bound. array : List[int] List of elements to be searched on target : int Element that is searched Returns ------- int index of element that is looked for. Examples -------- >>> lin_search(0, 4, [4, 5, 6, 7], 7) 3 >>> lin_search(0, 3, [4, 5, 6, 7], 7) -1 >>> lin_search(0, 2, [-18, 2], -18) 0 >>> lin_search(0, 1, [5], 5) 0 >>> lin_search(0, 3, ['a', 'c', 'd'], 'c') 1 >>> lin_search(0, 3, [.1, .4 , -.1], .1) 0 >>> lin_search(0, 3, [.1, .4 , -.1], -.1) 2 """ for i in range(left, right): if array[i] == target: return i return -1 def ite_ternary_search(array: list[int], target: int) -> int: """Iterative method of the ternary search algorithm. >>> test_list = [0, 1, 2, 8, 13, 17, 19, 32, 42] >>> ite_ternary_search(test_list, 3) -1 >>> ite_ternary_search(test_list, 13) 4 >>> ite_ternary_search([4, 5, 6, 7], 4) 0 >>> ite_ternary_search([4, 5, 6, 7], -10) -1 >>> ite_ternary_search([-18, 2], -18) 0 >>> ite_ternary_search([5], 5) 0 >>> ite_ternary_search(['a', 'c', 'd'], 'c') 1 >>> ite_ternary_search(['a', 'c', 'd'], 'f') -1 >>> ite_ternary_search([], 1) -1 >>> ite_ternary_search([.1, .4 , -.1], .1) 0 """ left = 0 right = len(array) while left <= right: if right - left < precision: return lin_search(left, right, array, target) one_third = (left + right) / 3 + 1 two_third = 2 * (left + right) / 3 + 1 if array[one_third] == target: return one_third elif array[two_third] == target: return two_third elif target < array[one_third]: right = one_third - 1 elif array[two_third] < target: left = two_third + 1 else: left = one_third + 1 right = two_third - 1 else: return -1 def rec_ternary_search(left: int, right: int, array: list[int], target: int) -> int: """Recursive method of the ternary search algorithm. >>> test_list = [0, 1, 2, 8, 13, 17, 19, 32, 42] >>> rec_ternary_search(0, len(test_list), test_list, 3) -1 >>> rec_ternary_search(4, len(test_list), test_list, 42) 8 >>> rec_ternary_search(0, 2, [4, 5, 6, 7], 4) 0 >>> rec_ternary_search(0, 3, [4, 5, 6, 7], -10) -1 >>> rec_ternary_search(0, 1, [-18, 2], -18) 0 >>> rec_ternary_search(0, 1, [5], 5) 0 >>> rec_ternary_search(0, 2, ['a', 'c', 'd'], 'c') 1 >>> rec_ternary_search(0, 2, ['a', 'c', 'd'], 'f') -1 >>> rec_ternary_search(0, 0, [], 1) -1 >>> rec_ternary_search(0, 3, [.1, .4 , -.1], .1) 0 """ if left < right: if right - left < precision: return lin_search(left, right, array, target) one_third = (left + right) / 3 + 1 two_third = 2 * (left + right) / 3 + 1 if array[one_third] == target: return one_third elif array[two_third] == target: return two_third elif target < array[one_third]: return rec_ternary_search(left, one_third - 1, array, target) elif array[two_third] < target: return rec_ternary_search(two_third + 1, right, array, target) else: return rec_ternary_search(one_third + 1, two_third - 1, array, target) else: return -1 if __name__ == "__main__": user_input = input("Enter numbers separated by comma:\n").strip() collection = [int(item.strip()) for item in user_input.split(",")] assert collection == sorted(collection), f"List must be ordered.\n{collection}." target = int(input("Enter the number to be found in the list:\n").strip()) result1 = ite_ternary_search(collection, target) result2 = rec_ternary_search(0, len(collection) - 1, collection, target) if result2 != -1: print(f"Iterative search: {target} found at positions: {result1}") print(f"Recursive search: {target} found at positions: {result2}") else: print("Not found")
""" This is a type of divide and conquer algorithm which divides the search space into 3 parts and finds the target value based on the property of the array or list (usually monotonic property). Time Complexity : O(log3 N) Space Complexity : O(1) """ from __future__ import annotations # This is the precision for this function which can be altered. # It is recommended for users to keep this number greater than or equal to 10. precision = 10 # This is the linear search that will occur after the search space has become smaller. def lin_search(left: int, right: int, array: list[int], target: int) -> int: """Perform linear search in list. Returns -1 if element is not found. Parameters ---------- left : int left index bound. right : int right index bound. array : List[int] List of elements to be searched on target : int Element that is searched Returns ------- int index of element that is looked for. Examples -------- >>> lin_search(0, 4, [4, 5, 6, 7], 7) 3 >>> lin_search(0, 3, [4, 5, 6, 7], 7) -1 >>> lin_search(0, 2, [-18, 2], -18) 0 >>> lin_search(0, 1, [5], 5) 0 >>> lin_search(0, 3, ['a', 'c', 'd'], 'c') 1 >>> lin_search(0, 3, [.1, .4 , -.1], .1) 0 >>> lin_search(0, 3, [.1, .4 , -.1], -.1) 2 """ for i in range(left, right): if array[i] == target: return i return -1 def ite_ternary_search(array: list[int], target: int) -> int: """Iterative method of the ternary search algorithm. >>> test_list = [0, 1, 2, 8, 13, 17, 19, 32, 42] >>> ite_ternary_search(test_list, 3) -1 >>> ite_ternary_search(test_list, 13) 4 >>> ite_ternary_search([4, 5, 6, 7], 4) 0 >>> ite_ternary_search([4, 5, 6, 7], -10) -1 >>> ite_ternary_search([-18, 2], -18) 0 >>> ite_ternary_search([5], 5) 0 >>> ite_ternary_search(['a', 'c', 'd'], 'c') 1 >>> ite_ternary_search(['a', 'c', 'd'], 'f') -1 >>> ite_ternary_search([], 1) -1 >>> ite_ternary_search([.1, .4 , -.1], .1) 0 """ left = 0 right = len(array) while left <= right: if right - left < precision: return lin_search(left, right, array, target) one_third = (left + right) // 3 + 1 two_third = 2 * (left + right) // 3 + 1 if array[one_third] == target: return one_third elif array[two_third] == target: return two_third elif target < array[one_third]: right = one_third - 1 elif array[two_third] < target: left = two_third + 1 else: left = one_third + 1 right = two_third - 1 else: return -1 def rec_ternary_search(left: int, right: int, array: list[int], target: int) -> int: """Recursive method of the ternary search algorithm. >>> test_list = [0, 1, 2, 8, 13, 17, 19, 32, 42] >>> rec_ternary_search(0, len(test_list), test_list, 3) -1 >>> rec_ternary_search(4, len(test_list), test_list, 42) 8 >>> rec_ternary_search(0, 2, [4, 5, 6, 7], 4) 0 >>> rec_ternary_search(0, 3, [4, 5, 6, 7], -10) -1 >>> rec_ternary_search(0, 1, [-18, 2], -18) 0 >>> rec_ternary_search(0, 1, [5], 5) 0 >>> rec_ternary_search(0, 2, ['a', 'c', 'd'], 'c') 1 >>> rec_ternary_search(0, 2, ['a', 'c', 'd'], 'f') -1 >>> rec_ternary_search(0, 0, [], 1) -1 >>> rec_ternary_search(0, 3, [.1, .4 , -.1], .1) 0 """ if left < right: if right - left < precision: return lin_search(left, right, array, target) one_third = (left + right) // 3 + 1 two_third = 2 * (left + right) // 3 + 1 if array[one_third] == target: return one_third elif array[two_third] == target: return two_third elif target < array[one_third]: return rec_ternary_search(left, one_third - 1, array, target) elif array[two_third] < target: return rec_ternary_search(two_third + 1, right, array, target) else: return rec_ternary_search(one_third + 1, two_third - 1, array, target) else: return -1 if __name__ == "__main__": import doctest doctest.testmod() user_input = input("Enter numbers separated by comma:\n").strip() collection = [int(item.strip()) for item in user_input.split(",")] assert collection == sorted(collection), f"List must be ordered.\n{collection}." target = int(input("Enter the number to be found in the list:\n").strip()) result1 = ite_ternary_search(collection, target) result2 = rec_ternary_search(0, len(collection) - 1, collection, target) if result2 != -1: print(f"Iterative search: {target} found at positions: {result1}") print(f"Recursive search: {target} found at positions: {result2}") else: print("Not found")
1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
def binomial_coefficient(n, r): """ Find binomial coefficient using pascals triangle. >>> binomial_coefficient(10, 5) 252 """ C = [0 for i in range(r + 1)] # nc0 = 1 C[0] = 1 for i in range(1, n + 1): # to compute current row from previous row. j = min(i, r) while j > 0: C[j] += C[j - 1] j -= 1 return C[r] print(binomial_coefficient(n=10, r=5))
def binomial_coefficient(n, r): """ Find binomial coefficient using pascals triangle. >>> binomial_coefficient(10, 5) 252 """ C = [0 for i in range(r + 1)] # nc0 = 1 C[0] = 1 for i in range(1, n + 1): # to compute current row from previous row. j = min(i, r) while j > 0: C[j] += C[j - 1] j -= 1 return C[r] print(binomial_coefficient(n=10, r=5))
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" A pure implementation of Dutch national flag (DNF) sort algorithm in Python. Dutch National Flag algorithm is an algorithm originally designed by Edsger Dijkstra. It is the most optimal sort for 3 unique values (eg. 0, 1, 2) in a sequence. DNF can sort a sequence of n size with [0 <= a[i] <= 2] at guaranteed O(n) complexity in a single pass. The flag of the Netherlands consists of three colors: white, red, and blue. The task is to randomly arrange balls of white, red, and blue in such a way that balls of the same color are placed together. DNF sorts a sequence of 0, 1, and 2's in linear time that does not consume any extra space. This algorithm can be implemented only on a sequence that contains three unique elements. 1) Time complexity is O(n). 2) Space complexity is O(1). More info on: https://en.wikipedia.org/wiki/Dutch_national_flag_problem For doctests run following command: python3 -m doctest -v dutch_national_flag_sort.py For manual testing run: python dnf_sort.py """ # Python program to sort a sequence containing only 0, 1 and 2 in a single pass. red = 0 # The first color of the flag. white = 1 # The second color of the flag. blue = 2 # The third color of the flag. colors = (red, white, blue) def dutch_national_flag_sort(sequence: list) -> list: """ A pure Python implementation of Dutch National Flag sort algorithm. :param data: 3 unique integer values (e.g., 0, 1, 2) in an sequence :return: The same collection in ascending order >>> dutch_national_flag_sort([]) [] >>> dutch_national_flag_sort([0]) [0] >>> dutch_national_flag_sort([2, 1, 0, 0, 1, 2]) [0, 0, 1, 1, 2, 2] >>> dutch_national_flag_sort([0, 1, 1, 0, 1, 2, 1, 2, 0, 0, 0, 1]) [0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2] >>> dutch_national_flag_sort("abacab") Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort("Abacab") Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([3, 2, 3, 1, 3, 0, 3]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([-1, 2, -1, 1, -1, 0, -1]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([1.1, 2, 1.1, 1, 1.1, 0, 1.1]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values """ if not sequence: return [] if len(sequence) == 1: return list(sequence) low = 0 high = len(sequence) - 1 mid = 0 while mid <= high: if sequence[mid] == colors[0]: sequence[low], sequence[mid] = sequence[mid], sequence[low] low += 1 mid += 1 elif sequence[mid] == colors[1]: mid += 1 elif sequence[mid] == colors[2]: sequence[mid], sequence[high] = sequence[high], sequence[mid] high -= 1 else: raise ValueError( f"The elements inside the sequence must contains only {colors} values" ) return sequence if __name__ == "__main__": import doctest doctest.testmod() user_input = input("Enter numbers separated by commas:\n").strip() unsorted = [int(item.strip()) for item in user_input.split(",")] print(f"{dutch_national_flag_sort(unsorted)}")
""" A pure implementation of Dutch national flag (DNF) sort algorithm in Python. Dutch National Flag algorithm is an algorithm originally designed by Edsger Dijkstra. It is the most optimal sort for 3 unique values (eg. 0, 1, 2) in a sequence. DNF can sort a sequence of n size with [0 <= a[i] <= 2] at guaranteed O(n) complexity in a single pass. The flag of the Netherlands consists of three colors: white, red, and blue. The task is to randomly arrange balls of white, red, and blue in such a way that balls of the same color are placed together. DNF sorts a sequence of 0, 1, and 2's in linear time that does not consume any extra space. This algorithm can be implemented only on a sequence that contains three unique elements. 1) Time complexity is O(n). 2) Space complexity is O(1). More info on: https://en.wikipedia.org/wiki/Dutch_national_flag_problem For doctests run following command: python3 -m doctest -v dutch_national_flag_sort.py For manual testing run: python dnf_sort.py """ # Python program to sort a sequence containing only 0, 1 and 2 in a single pass. red = 0 # The first color of the flag. white = 1 # The second color of the flag. blue = 2 # The third color of the flag. colors = (red, white, blue) def dutch_national_flag_sort(sequence: list) -> list: """ A pure Python implementation of Dutch National Flag sort algorithm. :param data: 3 unique integer values (e.g., 0, 1, 2) in an sequence :return: The same collection in ascending order >>> dutch_national_flag_sort([]) [] >>> dutch_national_flag_sort([0]) [0] >>> dutch_national_flag_sort([2, 1, 0, 0, 1, 2]) [0, 0, 1, 1, 2, 2] >>> dutch_national_flag_sort([0, 1, 1, 0, 1, 2, 1, 2, 0, 0, 0, 1]) [0, 0, 0, 0, 0, 1, 1, 1, 1, 1, 2, 2] >>> dutch_national_flag_sort("abacab") Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort("Abacab") Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([3, 2, 3, 1, 3, 0, 3]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([-1, 2, -1, 1, -1, 0, -1]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values >>> dutch_national_flag_sort([1.1, 2, 1.1, 1, 1.1, 0, 1.1]) Traceback (most recent call last): ... ValueError: The elements inside the sequence must contains only (0, 1, 2) values """ if not sequence: return [] if len(sequence) == 1: return list(sequence) low = 0 high = len(sequence) - 1 mid = 0 while mid <= high: if sequence[mid] == colors[0]: sequence[low], sequence[mid] = sequence[mid], sequence[low] low += 1 mid += 1 elif sequence[mid] == colors[1]: mid += 1 elif sequence[mid] == colors[2]: sequence[mid], sequence[high] = sequence[high], sequence[mid] high -= 1 else: raise ValueError( f"The elements inside the sequence must contains only {colors} values" ) return sequence if __name__ == "__main__": import doctest doctest.testmod() user_input = input("Enter numbers separated by commas:\n").strip() unsorted = [int(item.strip()) for item in user_input.split(",")] print(f"{dutch_national_flag_sort(unsorted)}")
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
import unittest from knapsack import greedy_knapsack as kp class TestClass(unittest.TestCase): """ Test cases for knapsack """ def test_sorted(self): """ kp.calc_profit takes the required argument (profit, weight, max_weight) and returns whether the answer matches to the expected ones """ profit = [10, 20, 30, 40, 50, 60] weight = [2, 4, 6, 8, 10, 12] max_weight = 100 self.assertEqual(kp.calc_profit(profit, weight, max_weight), 210) def test_negative_max_weight(self): """ Returns ValueError for any negative max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = -15 self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_negative_profit_value(self): """ Returns ValueError for any negative profit value in the list :return: ValueError """ # profit = [10, -20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Weight can not be negative.") def test_negative_weight_value(self): """ Returns ValueError for any negative weight value in the list :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, -4, 6, -8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Profit can not be negative.") def test_null_max_weight(self): """ Returns ValueError for any zero max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = null self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_unequal_list_length(self): """ Returns IndexError if length of lists (profit and weight) are unequal. :return: IndexError """ # profit = [10, 20, 30, 40, 50] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 100 self.assertRaisesRegex( IndexError, "The length of profit and weight must be same." ) if __name__ == "__main__": unittest.main()
import unittest from knapsack import greedy_knapsack as kp class TestClass(unittest.TestCase): """ Test cases for knapsack """ def test_sorted(self): """ kp.calc_profit takes the required argument (profit, weight, max_weight) and returns whether the answer matches to the expected ones """ profit = [10, 20, 30, 40, 50, 60] weight = [2, 4, 6, 8, 10, 12] max_weight = 100 self.assertEqual(kp.calc_profit(profit, weight, max_weight), 210) def test_negative_max_weight(self): """ Returns ValueError for any negative max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = -15 self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_negative_profit_value(self): """ Returns ValueError for any negative profit value in the list :return: ValueError """ # profit = [10, -20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Weight can not be negative.") def test_negative_weight_value(self): """ Returns ValueError for any negative weight value in the list :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, -4, 6, -8, 10, 12] # max_weight = 15 self.assertRaisesRegex(ValueError, "Profit can not be negative.") def test_null_max_weight(self): """ Returns ValueError for any zero max_weight value :return: ValueError """ # profit = [10, 20, 30, 40, 50, 60] # weight = [2, 4, 6, 8, 10, 12] # max_weight = null self.assertRaisesRegex(ValueError, "max_weight must greater than zero.") def test_unequal_list_length(self): """ Returns IndexError if length of lists (profit and weight) are unequal. :return: IndexError """ # profit = [10, 20, 30, 40, 50] # weight = [2, 4, 6, 8, 10, 12] # max_weight = 100 self.assertRaisesRegex( IndexError, "The length of profit and weight must be same." ) if __name__ == "__main__": unittest.main()
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
# https://en.wikipedia.org/wiki/Trifid_cipher from __future__ import annotations def __encryptPart(messagePart: str, character2Number: dict[str, str]) -> str: one, two, three = "", "", "" tmp = [] for character in messagePart: tmp.append(character2Number[character]) for each in tmp: one += each[0] two += each[1] three += each[2] return one + two + three def __decryptPart( messagePart: str, character2Number: dict[str, str] ) -> tuple[str, str, str]: tmp, thisPart = "", "" result = [] for character in messagePart: thisPart += character2Number[character] for digit in thisPart: tmp += digit if len(tmp) == len(messagePart): result.append(tmp) tmp = "" return result[0], result[1], result[2] def __prepare( message: str, alphabet: str ) -> tuple[str, str, dict[str, str], dict[str, str]]: # Validate message and alphabet, set to upper and remove spaces alphabet = alphabet.replace(" ", "").upper() message = message.replace(" ", "").upper() # Check length and characters if len(alphabet) != 27: raise KeyError("Length of alphabet has to be 27.") for each in message: if each not in alphabet: raise ValueError("Each message character has to be included in alphabet!") # Generate dictionares numbers = ( "111", "112", "113", "121", "122", "123", "131", "132", "133", "211", "212", "213", "221", "222", "223", "231", "232", "233", "311", "312", "313", "321", "322", "323", "331", "332", "333", ) character2Number = {} number2Character = {} for letter, number in zip(alphabet, numbers): character2Number[letter] = number number2Character[number] = letter return message, alphabet, character2Number, number2Character def encryptMessage( message: str, alphabet: str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ.", period: int = 5 ) -> str: message, alphabet, character2Number, number2Character = __prepare(message, alphabet) encrypted, encrypted_numeric = "", "" for i in range(0, len(message) + 1, period): encrypted_numeric += __encryptPart(message[i : i + period], character2Number) for i in range(0, len(encrypted_numeric), 3): encrypted += number2Character[encrypted_numeric[i : i + 3]] return encrypted def decryptMessage( message: str, alphabet: str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ.", period: int = 5 ) -> str: message, alphabet, character2Number, number2Character = __prepare(message, alphabet) decrypted_numeric = [] decrypted = "" for i in range(0, len(message) + 1, period): a, b, c = __decryptPart(message[i : i + period], character2Number) for j in range(0, len(a)): decrypted_numeric.append(a[j] + b[j] + c[j]) for each in decrypted_numeric: decrypted += number2Character[each] return decrypted if __name__ == "__main__": msg = "DEFEND THE EAST WALL OF THE CASTLE." encrypted = encryptMessage(msg, "EPSDUCVWYM.ZLKXNBTFGORIJHAQ") decrypted = decryptMessage(encrypted, "EPSDUCVWYM.ZLKXNBTFGORIJHAQ") print(f"Encrypted: {encrypted}\nDecrypted: {decrypted}")
# https://en.wikipedia.org/wiki/Trifid_cipher from __future__ import annotations def __encryptPart(messagePart: str, character2Number: dict[str, str]) -> str: one, two, three = "", "", "" tmp = [] for character in messagePart: tmp.append(character2Number[character]) for each in tmp: one += each[0] two += each[1] three += each[2] return one + two + three def __decryptPart( messagePart: str, character2Number: dict[str, str] ) -> tuple[str, str, str]: tmp, thisPart = "", "" result = [] for character in messagePart: thisPart += character2Number[character] for digit in thisPart: tmp += digit if len(tmp) == len(messagePart): result.append(tmp) tmp = "" return result[0], result[1], result[2] def __prepare( message: str, alphabet: str ) -> tuple[str, str, dict[str, str], dict[str, str]]: # Validate message and alphabet, set to upper and remove spaces alphabet = alphabet.replace(" ", "").upper() message = message.replace(" ", "").upper() # Check length and characters if len(alphabet) != 27: raise KeyError("Length of alphabet has to be 27.") for each in message: if each not in alphabet: raise ValueError("Each message character has to be included in alphabet!") # Generate dictionares numbers = ( "111", "112", "113", "121", "122", "123", "131", "132", "133", "211", "212", "213", "221", "222", "223", "231", "232", "233", "311", "312", "313", "321", "322", "323", "331", "332", "333", ) character2Number = {} number2Character = {} for letter, number in zip(alphabet, numbers): character2Number[letter] = number number2Character[number] = letter return message, alphabet, character2Number, number2Character def encryptMessage( message: str, alphabet: str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ.", period: int = 5 ) -> str: message, alphabet, character2Number, number2Character = __prepare(message, alphabet) encrypted, encrypted_numeric = "", "" for i in range(0, len(message) + 1, period): encrypted_numeric += __encryptPart(message[i : i + period], character2Number) for i in range(0, len(encrypted_numeric), 3): encrypted += number2Character[encrypted_numeric[i : i + 3]] return encrypted def decryptMessage( message: str, alphabet: str = "ABCDEFGHIJKLMNOPQRSTUVWXYZ.", period: int = 5 ) -> str: message, alphabet, character2Number, number2Character = __prepare(message, alphabet) decrypted_numeric = [] decrypted = "" for i in range(0, len(message) + 1, period): a, b, c = __decryptPart(message[i : i + period], character2Number) for j in range(0, len(a)): decrypted_numeric.append(a[j] + b[j] + c[j]) for each in decrypted_numeric: decrypted += number2Character[each] return decrypted if __name__ == "__main__": msg = "DEFEND THE EAST WALL OF THE CASTLE." encrypted = encryptMessage(msg, "EPSDUCVWYM.ZLKXNBTFGORIJHAQ") decrypted = decryptMessage(encrypted, "EPSDUCVWYM.ZLKXNBTFGORIJHAQ") print(f"Encrypted: {encrypted}\nDecrypted: {decrypted}")
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
#!/usr/bin/env python3 from __future__ import annotations def decrypt_caesar_with_chi_squared( ciphertext: str, cipher_alphabet: list[str] | None = None, frequencies_dict: dict[str, float] | None = None, case_sensitive: bool = False, ) -> tuple[int, float, str]: """ Basic Usage =========== Arguments: * ciphertext (str): the text to decode (encoded with the caesar cipher) Optional Arguments: * cipher_alphabet (list): the alphabet used for the cipher (each letter is a string separated by commas) * frequencies_dict (dict): a dictionary of word frequencies where keys are the letters and values are a percentage representation of the frequency as a decimal/float * case_sensitive (bool): a boolean value: True if the case matters during decryption, False if it doesn't Returns: * A tuple in the form of: ( most_likely_cipher, most_likely_cipher_chi_squared_value, decoded_most_likely_cipher ) where... - most_likely_cipher is an integer representing the shift of the smallest chi-squared statistic (most likely key) - most_likely_cipher_chi_squared_value is a float representing the chi-squared statistic of the most likely shift - decoded_most_likely_cipher is a string with the decoded cipher (decoded by the most_likely_cipher key) The Chi-squared test ==================== The caesar cipher ----------------- The caesar cipher is a very insecure encryption algorithm, however it has been used since Julius Caesar. The cipher is a simple substitution cipher where each character in the plain text is replaced by a character in the alphabet a certain number of characters after the original character. The number of characters away is called the shift or key. For example: Plain text: hello Key: 1 Cipher text: ifmmp (each letter in hello has been shifted one to the right in the eng. alphabet) As you can imagine, this doesn't provide lots of security. In fact decrypting ciphertext by brute-force is extremely easy even by hand. However one way to do that is the chi-squared test. The chi-squared test ------------------- Each letter in the english alphabet has a frequency, or the amount of times it shows up compared to other letters (usually expressed as a decimal representing the percentage likelihood). The most common letter in the english language is "e" with a frequency of 0.11162 or 11.162%. The test is completed in the following fashion. 1. The ciphertext is decoded in a brute force way (every combination of the 26 possible combinations) 2. For every combination, for each letter in the combination, the average amount of times the letter should appear the message is calculated by multiplying the total number of characters by the frequency of the letter For example: In a message of 100 characters, e should appear around 11.162 times. 3. Then, to calculate the margin of error (the amount of times the letter SHOULD appear with the amount of times the letter DOES appear), we use the chi-squared test. The following formula is used: Let: - n be the number of times the letter actually appears - p be the predicted value of the number of times the letter should appear (see #2) - let v be the chi-squared test result (referred to here as chi-squared value/statistic) (n - p)^2 --------- = v p 4. Each chi squared value for each letter is then added up to the total. The total is the chi-squared statistic for that encryption key. 5. The encryption key with the lowest chi-squared value is the most likely to be the decoded answer. Further Reading ================ * http://practicalcryptography.com/cryptanalysis/text-characterisation/chi-squared- statistic/ * https://en.wikipedia.org/wiki/Letter_frequency * https://en.wikipedia.org/wiki/Chi-squared_test * https://en.m.wikipedia.org/wiki/Caesar_cipher Doctests ======== >>> decrypt_caesar_with_chi_squared( ... 'dof pz aol jhlzhy jpwoly zv wvwbshy? pa pz avv lhzf av jyhjr!' ... ) # doctest: +NORMALIZE_WHITESPACE (7, 3129.228005747531, 'why is the caesar cipher so popular? it is too easy to crack!') >>> decrypt_caesar_with_chi_squared('crybd cdbsxq') (10, 233.35343938980898, 'short string') >>> decrypt_caesar_with_chi_squared('Crybd Cdbsxq', case_sensitive=True) (10, 233.35343938980898, 'Short String') >>> decrypt_caesar_with_chi_squared(12) Traceback (most recent call last): AttributeError: 'int' object has no attribute 'lower' """ alphabet_letters = cipher_alphabet or [chr(i) for i in range(97, 123)] # If the argument is None or the user provided an empty dictionary if not frequencies_dict: # Frequencies of letters in the english language (how much they show up) frequencies = { "a": 0.08497, "b": 0.01492, "c": 0.02202, "d": 0.04253, "e": 0.11162, "f": 0.02228, "g": 0.02015, "h": 0.06094, "i": 0.07546, "j": 0.00153, "k": 0.01292, "l": 0.04025, "m": 0.02406, "n": 0.06749, "o": 0.07507, "p": 0.01929, "q": 0.00095, "r": 0.07587, "s": 0.06327, "t": 0.09356, "u": 0.02758, "v": 0.00978, "w": 0.02560, "x": 0.00150, "y": 0.01994, "z": 0.00077, } else: # Custom frequencies dictionary frequencies = frequencies_dict if not case_sensitive: ciphertext = ciphertext.lower() # Chi squared statistic values chi_squared_statistic_values: dict[int, tuple[float, str]] = {} # cycle through all of the shifts for shift in range(len(alphabet_letters)): decrypted_with_shift = "" # decrypt the message with the shift for letter in ciphertext: try: # Try to index the letter in the alphabet new_key = (alphabet_letters.index(letter.lower()) - shift) % len( alphabet_letters ) decrypted_with_shift += ( alphabet_letters[new_key].upper() if case_sensitive and letter.isupper() else alphabet_letters[new_key] ) except ValueError: # Append the character if it isn't in the alphabet decrypted_with_shift += letter chi_squared_statistic = 0.0 # Loop through each letter in the decoded message with the shift for letter in decrypted_with_shift: if case_sensitive: letter = letter.lower() if letter in frequencies: # Get the amount of times the letter occurs in the message occurrences = decrypted_with_shift.lower().count(letter) # Get the excepcted amount of times the letter should appear based # on letter frequencies expected = frequencies[letter] * occurrences # Complete the chi squared statistic formula chi_letter_value = ((occurrences - expected) ** 2) / expected # Add the margin of error to the total chi squared statistic chi_squared_statistic += chi_letter_value else: if letter.lower() in frequencies: # Get the amount of times the letter occurs in the message occurrences = decrypted_with_shift.count(letter) # Get the excepcted amount of times the letter should appear based # on letter frequencies expected = frequencies[letter] * occurrences # Complete the chi squared statistic formula chi_letter_value = ((occurrences - expected) ** 2) / expected # Add the margin of error to the total chi squared statistic chi_squared_statistic += chi_letter_value # Add the data to the chi_squared_statistic_values dictionary chi_squared_statistic_values[shift] = ( chi_squared_statistic, decrypted_with_shift, ) # Get the most likely cipher by finding the cipher with the smallest chi squared # statistic def chi_squared_statistic_values_sorting_key(key: int) -> tuple[float, str]: return chi_squared_statistic_values[key] most_likely_cipher: int = min( chi_squared_statistic_values, key=chi_squared_statistic_values_sorting_key, ) # Get all the data from the most likely cipher (key, decoded message) ( most_likely_cipher_chi_squared_value, decoded_most_likely_cipher, ) = chi_squared_statistic_values[most_likely_cipher] # Return the data on the most likely shift return ( most_likely_cipher, most_likely_cipher_chi_squared_value, decoded_most_likely_cipher, )
#!/usr/bin/env python3 from __future__ import annotations def decrypt_caesar_with_chi_squared( ciphertext: str, cipher_alphabet: list[str] | None = None, frequencies_dict: dict[str, float] | None = None, case_sensitive: bool = False, ) -> tuple[int, float, str]: """ Basic Usage =========== Arguments: * ciphertext (str): the text to decode (encoded with the caesar cipher) Optional Arguments: * cipher_alphabet (list): the alphabet used for the cipher (each letter is a string separated by commas) * frequencies_dict (dict): a dictionary of word frequencies where keys are the letters and values are a percentage representation of the frequency as a decimal/float * case_sensitive (bool): a boolean value: True if the case matters during decryption, False if it doesn't Returns: * A tuple in the form of: ( most_likely_cipher, most_likely_cipher_chi_squared_value, decoded_most_likely_cipher ) where... - most_likely_cipher is an integer representing the shift of the smallest chi-squared statistic (most likely key) - most_likely_cipher_chi_squared_value is a float representing the chi-squared statistic of the most likely shift - decoded_most_likely_cipher is a string with the decoded cipher (decoded by the most_likely_cipher key) The Chi-squared test ==================== The caesar cipher ----------------- The caesar cipher is a very insecure encryption algorithm, however it has been used since Julius Caesar. The cipher is a simple substitution cipher where each character in the plain text is replaced by a character in the alphabet a certain number of characters after the original character. The number of characters away is called the shift or key. For example: Plain text: hello Key: 1 Cipher text: ifmmp (each letter in hello has been shifted one to the right in the eng. alphabet) As you can imagine, this doesn't provide lots of security. In fact decrypting ciphertext by brute-force is extremely easy even by hand. However one way to do that is the chi-squared test. The chi-squared test ------------------- Each letter in the english alphabet has a frequency, or the amount of times it shows up compared to other letters (usually expressed as a decimal representing the percentage likelihood). The most common letter in the english language is "e" with a frequency of 0.11162 or 11.162%. The test is completed in the following fashion. 1. The ciphertext is decoded in a brute force way (every combination of the 26 possible combinations) 2. For every combination, for each letter in the combination, the average amount of times the letter should appear the message is calculated by multiplying the total number of characters by the frequency of the letter For example: In a message of 100 characters, e should appear around 11.162 times. 3. Then, to calculate the margin of error (the amount of times the letter SHOULD appear with the amount of times the letter DOES appear), we use the chi-squared test. The following formula is used: Let: - n be the number of times the letter actually appears - p be the predicted value of the number of times the letter should appear (see #2) - let v be the chi-squared test result (referred to here as chi-squared value/statistic) (n - p)^2 --------- = v p 4. Each chi squared value for each letter is then added up to the total. The total is the chi-squared statistic for that encryption key. 5. The encryption key with the lowest chi-squared value is the most likely to be the decoded answer. Further Reading ================ * http://practicalcryptography.com/cryptanalysis/text-characterisation/chi-squared- statistic/ * https://en.wikipedia.org/wiki/Letter_frequency * https://en.wikipedia.org/wiki/Chi-squared_test * https://en.m.wikipedia.org/wiki/Caesar_cipher Doctests ======== >>> decrypt_caesar_with_chi_squared( ... 'dof pz aol jhlzhy jpwoly zv wvwbshy? pa pz avv lhzf av jyhjr!' ... ) # doctest: +NORMALIZE_WHITESPACE (7, 3129.228005747531, 'why is the caesar cipher so popular? it is too easy to crack!') >>> decrypt_caesar_with_chi_squared('crybd cdbsxq') (10, 233.35343938980898, 'short string') >>> decrypt_caesar_with_chi_squared('Crybd Cdbsxq', case_sensitive=True) (10, 233.35343938980898, 'Short String') >>> decrypt_caesar_with_chi_squared(12) Traceback (most recent call last): AttributeError: 'int' object has no attribute 'lower' """ alphabet_letters = cipher_alphabet or [chr(i) for i in range(97, 123)] # If the argument is None or the user provided an empty dictionary if not frequencies_dict: # Frequencies of letters in the english language (how much they show up) frequencies = { "a": 0.08497, "b": 0.01492, "c": 0.02202, "d": 0.04253, "e": 0.11162, "f": 0.02228, "g": 0.02015, "h": 0.06094, "i": 0.07546, "j": 0.00153, "k": 0.01292, "l": 0.04025, "m": 0.02406, "n": 0.06749, "o": 0.07507, "p": 0.01929, "q": 0.00095, "r": 0.07587, "s": 0.06327, "t": 0.09356, "u": 0.02758, "v": 0.00978, "w": 0.02560, "x": 0.00150, "y": 0.01994, "z": 0.00077, } else: # Custom frequencies dictionary frequencies = frequencies_dict if not case_sensitive: ciphertext = ciphertext.lower() # Chi squared statistic values chi_squared_statistic_values: dict[int, tuple[float, str]] = {} # cycle through all of the shifts for shift in range(len(alphabet_letters)): decrypted_with_shift = "" # decrypt the message with the shift for letter in ciphertext: try: # Try to index the letter in the alphabet new_key = (alphabet_letters.index(letter.lower()) - shift) % len( alphabet_letters ) decrypted_with_shift += ( alphabet_letters[new_key].upper() if case_sensitive and letter.isupper() else alphabet_letters[new_key] ) except ValueError: # Append the character if it isn't in the alphabet decrypted_with_shift += letter chi_squared_statistic = 0.0 # Loop through each letter in the decoded message with the shift for letter in decrypted_with_shift: if case_sensitive: letter = letter.lower() if letter in frequencies: # Get the amount of times the letter occurs in the message occurrences = decrypted_with_shift.lower().count(letter) # Get the excepcted amount of times the letter should appear based # on letter frequencies expected = frequencies[letter] * occurrences # Complete the chi squared statistic formula chi_letter_value = ((occurrences - expected) ** 2) / expected # Add the margin of error to the total chi squared statistic chi_squared_statistic += chi_letter_value else: if letter.lower() in frequencies: # Get the amount of times the letter occurs in the message occurrences = decrypted_with_shift.count(letter) # Get the excepcted amount of times the letter should appear based # on letter frequencies expected = frequencies[letter] * occurrences # Complete the chi squared statistic formula chi_letter_value = ((occurrences - expected) ** 2) / expected # Add the margin of error to the total chi squared statistic chi_squared_statistic += chi_letter_value # Add the data to the chi_squared_statistic_values dictionary chi_squared_statistic_values[shift] = ( chi_squared_statistic, decrypted_with_shift, ) # Get the most likely cipher by finding the cipher with the smallest chi squared # statistic def chi_squared_statistic_values_sorting_key(key: int) -> tuple[float, str]: return chi_squared_statistic_values[key] most_likely_cipher: int = min( chi_squared_statistic_values, key=chi_squared_statistic_values_sorting_key, ) # Get all the data from the most likely cipher (key, decoded message) ( most_likely_cipher_chi_squared_value, decoded_most_likely_cipher, ) = chi_squared_statistic_values[most_likely_cipher] # Return the data on the most likely shift return ( most_likely_cipher, most_likely_cipher_chi_squared_value, decoded_most_likely_cipher, )
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
"""Matrix Exponentiation""" import timeit """ Matrix Exponentiation is a technique to solve linear recurrences in logarithmic time. You read more about it here: http://zobayer.blogspot.com/2010/11/matrix-exponentiation.html https://www.hackerearth.com/practice/notes/matrix-exponentiation-1/ """ class Matrix: def __init__(self, arg): if isinstance(arg, list): # Initializes a matrix identical to the one provided. self.t = arg self.n = len(arg) else: # Initializes a square matrix of the given size and set values to zero. self.n = arg self.t = [[0 for _ in range(self.n)] for _ in range(self.n)] def __mul__(self, b): matrix = Matrix(self.n) for i in range(self.n): for j in range(self.n): for k in range(self.n): matrix.t[i][j] += self.t[i][k] * b.t[k][j] return matrix def modular_exponentiation(a, b): matrix = Matrix([[1, 0], [0, 1]]) while b > 0: if b & 1: matrix *= a a *= a b >>= 1 return matrix def fibonacci_with_matrix_exponentiation(n, f1, f2): # Trivial Cases if n == 1: return f1 elif n == 2: return f2 matrix = Matrix([[1, 1], [1, 0]]) matrix = modular_exponentiation(matrix, n - 2) return f2 * matrix.t[0][0] + f1 * matrix.t[0][1] def simple_fibonacci(n, f1, f2): # Trivial Cases if n == 1: return f1 elif n == 2: return f2 fn_1 = f1 fn_2 = f2 n -= 2 while n > 0: fn_1, fn_2 = fn_1 + fn_2, fn_1 n -= 1 return fn_1 def matrix_exponentiation_time(): setup = """ from random import randint from __main__ import fibonacci_with_matrix_exponentiation """ code = "fibonacci_with_matrix_exponentiation(randint(1,70000), 1, 1)" exec_time = timeit.timeit(setup=setup, stmt=code, number=100) print("With matrix exponentiation the average execution time is ", exec_time / 100) return exec_time def simple_fibonacci_time(): setup = """ from random import randint from __main__ import simple_fibonacci """ code = "simple_fibonacci(randint(1,70000), 1, 1)" exec_time = timeit.timeit(setup=setup, stmt=code, number=100) print( "Without matrix exponentiation the average execution time is ", exec_time / 100 ) return exec_time def main(): matrix_exponentiation_time() simple_fibonacci_time() if __name__ == "__main__": main()
"""Matrix Exponentiation""" import timeit """ Matrix Exponentiation is a technique to solve linear recurrences in logarithmic time. You read more about it here: http://zobayer.blogspot.com/2010/11/matrix-exponentiation.html https://www.hackerearth.com/practice/notes/matrix-exponentiation-1/ """ class Matrix: def __init__(self, arg): if isinstance(arg, list): # Initializes a matrix identical to the one provided. self.t = arg self.n = len(arg) else: # Initializes a square matrix of the given size and set values to zero. self.n = arg self.t = [[0 for _ in range(self.n)] for _ in range(self.n)] def __mul__(self, b): matrix = Matrix(self.n) for i in range(self.n): for j in range(self.n): for k in range(self.n): matrix.t[i][j] += self.t[i][k] * b.t[k][j] return matrix def modular_exponentiation(a, b): matrix = Matrix([[1, 0], [0, 1]]) while b > 0: if b & 1: matrix *= a a *= a b >>= 1 return matrix def fibonacci_with_matrix_exponentiation(n, f1, f2): # Trivial Cases if n == 1: return f1 elif n == 2: return f2 matrix = Matrix([[1, 1], [1, 0]]) matrix = modular_exponentiation(matrix, n - 2) return f2 * matrix.t[0][0] + f1 * matrix.t[0][1] def simple_fibonacci(n, f1, f2): # Trivial Cases if n == 1: return f1 elif n == 2: return f2 fn_1 = f1 fn_2 = f2 n -= 2 while n > 0: fn_1, fn_2 = fn_1 + fn_2, fn_1 n -= 1 return fn_1 def matrix_exponentiation_time(): setup = """ from random import randint from __main__ import fibonacci_with_matrix_exponentiation """ code = "fibonacci_with_matrix_exponentiation(randint(1,70000), 1, 1)" exec_time = timeit.timeit(setup=setup, stmt=code, number=100) print("With matrix exponentiation the average execution time is ", exec_time / 100) return exec_time def simple_fibonacci_time(): setup = """ from random import randint from __main__ import simple_fibonacci """ code = "simple_fibonacci(randint(1,70000), 1, 1)" exec_time = timeit.timeit(setup=setup, stmt=code, number=100) print( "Without matrix exponentiation the average execution time is ", exec_time / 100 ) return exec_time def main(): matrix_exponentiation_time() simple_fibonacci_time() if __name__ == "__main__": main()
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
""" Counting Summations Problem 76: https://projecteuler.net/problem=76 It is possible to write five as a sum in exactly six different ways: 4 + 1 3 + 2 3 + 1 + 1 2 + 2 + 1 2 + 1 + 1 + 1 1 + 1 + 1 + 1 + 1 How many different ways can one hundred be written as a sum of at least two positive integers? """ def solution(m: int = 100) -> int: """ Returns the number of different ways the number m can be written as a sum of at least two positive integers. >>> solution(100) 190569291 >>> solution(50) 204225 >>> solution(30) 5603 >>> solution(10) 41 >>> solution(5) 6 >>> solution(3) 2 >>> solution(2) 1 >>> solution(1) 0 """ memo = [[0 for _ in range(m)] for _ in range(m + 1)] for i in range(m + 1): memo[i][0] = 1 for n in range(m + 1): for k in range(1, m): memo[n][k] += memo[n][k - 1] if n > k: memo[n][k] += memo[n - k - 1][k] return memo[m][m - 1] - 1 if __name__ == "__main__": print(solution(int(input("Enter a number: ").strip())))
""" Counting Summations Problem 76: https://projecteuler.net/problem=76 It is possible to write five as a sum in exactly six different ways: 4 + 1 3 + 2 3 + 1 + 1 2 + 2 + 1 2 + 1 + 1 + 1 1 + 1 + 1 + 1 + 1 How many different ways can one hundred be written as a sum of at least two positive integers? """ def solution(m: int = 100) -> int: """ Returns the number of different ways the number m can be written as a sum of at least two positive integers. >>> solution(100) 190569291 >>> solution(50) 204225 >>> solution(30) 5603 >>> solution(10) 41 >>> solution(5) 6 >>> solution(3) 2 >>> solution(2) 1 >>> solution(1) 0 """ memo = [[0 for _ in range(m)] for _ in range(m + 1)] for i in range(m + 1): memo[i][0] = 1 for n in range(m + 1): for k in range(1, m): memo[n][k] += memo[n][k - 1] if n > k: memo[n][k] += memo[n - k - 1][k] return memo[m][m - 1] - 1 if __name__ == "__main__": print(solution(int(input("Enter a number: ").strip())))
-1
TheAlgorithms/Python
5,799
[mypy] Type annotations for searches directory
### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
Rohanrbharadwaj
"2021-11-09T08:48:07Z"
"2021-11-09T15:48:30Z"
c3d1ff0ebd034eeb6105ef8bad6a3c962efa56f2
745f9e2bc37280368ae007d1a30ffc217e4a5b81
[mypy] Type annotations for searches directory. ### Describe your change: Related to #4052 * [ ] Add an algorithm? * [x] Fix a bug or typo in an existing algorithm? * [ ] Documentation change? ### Checklist: * [x] I have read [CONTRIBUTING.md](https://github.com/TheAlgorithms/Python/blob/master/CONTRIBUTING.md). * [x] This pull request is all my own work -- I have not plagiarized. * [x] I know that pull requests will not be merged if they fail the automated tests. * [x] This PR only changes one algorithm file. To ease review, please open separate PRs for separate algorithms. * [x] All new Python files are placed inside an existing directory. * [x] All filenames are in all lowercase characters with no spaces or dashes. * [x] All functions and variable names follow Python naming conventions. * [x] All function parameters and return values are annotated with Python [type hints](https://docs.python.org/3/library/typing.html). * [x] All functions have [doctests](https://docs.python.org/3/library/doctest.html) that pass the automated testing. * [x] All new algorithms have a URL in its comments that points to Wikipedia or other similar explanation. * [x] If this pull request resolves one or more open issues then the commit message contains `Fixes: #{$ISSUE_NO}`.
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