prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  [BUG] dash doesn't get imported when a file named "org.py", "dash.py", or "test.py" with specific content is present in the current directory // "AttributeError: module 'dash' has no attribute 'Dash'"
  **Describe your context**
  
  ```
  dash (1.9.1)
  dash-core-components (1.8.1)
  dash-html-components (1.0.2)
  dash-renderer (1.2.4)
  dash-table (4.6.1)
  
  ```
  
  **Describe the bug**
  
  If a file named ``org.py`` is present in the current directory with the following content:
  
  ```
  import dash_core_components as dcc
  ```
  
  then dash doesn't import and I get the following message:
  ```
  >>> import dash
  Dash was not successfully imported. Make sure you don't have a file named
  'dash.py' in your current directory.
  ```
  
  **Expected behavior**
  dash should import without any error.
  
  **Additional info**
  - The org.py is never imported
  - If I rename the file to a different name dash get imported without any problem.
  - The problem is shown also with ``import dash_html_components as html```
  - The problem is shown either on Windows and in Linux
  - Tested with python3.4, python3.6, python3.8
  
  **Steps to replicate the problem on Linux**
  ```
  $ mkdir mytest
  $ cd mytest
  $ echo "import dash_core_components as dcc" > org.py
  $ python3 -m venv venv
  $ . venv/bin/activate
  (venv) $ pip install dash
  (venv) $ python
  Python 3.4.6 (default, Mar 01 2017, 16:52:22) [GCC] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import dash
  Dash was not successfully imported. Make sure you don't have a file named
  'dash.py' in your current directory.
  (venv) $
  ```
  
  if I rename the file the import works:
  ```
  (venv) $ mv org.py othername.py
  (venv) $ python
  Python 3.4.6 (default, Mar 01 2017, 16:52:22) [GCC] on linux
  Type "help", "copyright", "credits" or "license" for more information.
  >>> import dash
  >>>
  ```
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `dash/__init__.py`
  Content:
  ```
  1 from .dash import Dash, no_update  # noqa: F401
  2 from . import dependencies  # noqa: F401
  3 from . import development  # noqa: F401
  4 from . import exceptions  # noqa: F401
  5 from . import resources  # noqa: F401
  6 from .version import __version__  # noqa: F401
  7 from ._callback_context import callback_context  # noqa: F401
  8
  ```
  --- END FILES ---
  
  Please first localize the bug based on the issue statement, and then generate a patch according to the `git diff` format fenced by three backticks.
  
  Here is an example:
  
  ```diff
  diff --git a/examples/server_async.py b/examples/server_async.py
  --- a/examples/server_async.py
  +++ b/examples/server_async.py
  @@ -313,4 +313,4 @@
   
   
   if __name__ == "__main__":
  -    asyncio.run(run_async_server("."), debug=True)
  +    asyncio.run(run_async_server(), debug=True)
  diff --git a/examples/server_sync.py b/examples/server_sync.py
  --- a/examples/server_sync.py
  +++ b/examples/server_sync.py
  @@ -313,5 +313,5 @@
   
   
   if __name__ == "__main__":
  -    server = run_sync_server(".")
  +    server = run_sync_server()
       server.shutdown()
  
  ```
  
golden_diff: diff --git a/dash/__init__.py b/dash/__init__.py
  --- a/dash/__init__.py
  +++ b/dash/__init__.py
  @@ -1,7 +1,11 @@
  -from .dash import Dash, no_update  # noqa: F401
  -from . import dependencies  # noqa: F401
  -from . import development  # noqa: F401
  -from . import exceptions  # noqa: F401
  -from . import resources  # noqa: F401
  -from .version import __version__  # noqa: F401
  -from ._callback_context import callback_context  # noqa: F401
  +# pylint: disable=C0413
  +# __plotly_dash is for the "make sure you don't have a dash.py" check
  +# must come before any other imports.
  +__plotly_dash = True
  +from .dash import Dash, no_update  # noqa: F401,E402
  +from . import dependencies  # noqa: F401,E402
  +from . import development  # noqa: F401,E402
  +from . import exceptions  # noqa: F401,E402
  +from . import resources  # noqa: F401,E402
  +from .version import __version__  # noqa: F401,E402
  +from ._callback_context import callback_context  # noqa: F401,E402
  
verification_info: {"golden_diff": "diff --git a/dash/__init__.py b/dash/__init__.py\n--- a/dash/__init__.py\n+++ b/dash/__init__.py\n@@ -1,7 +1,11 @@\n-from .dash import Dash, no_update  # noqa: F401\n-from . import dependencies  # noqa: F401\n-from . import development  # noqa: F401\n-from . import exceptions  # noqa: F401\n-from . import resources  # noqa: F401\n-from .version import __version__  # noqa: F401\n-from ._callback_context import callback_context  # noqa: F401\n+# pylint: disable=C0413\n+# __plotly_dash is for the \"make sure you don't have a dash.py\" check\n+# must come before any other imports.\n+__plotly_dash = True\n+from .dash import Dash, no_update  # noqa: F401,E402\n+from . import dependencies  # noqa: F401,E402\n+from . import development  # noqa: F401,E402\n+from . import exceptions  # noqa: F401,E402\n+from . import resources  # noqa: F401,E402\n+from .version import __version__  # noqa: F401,E402\n+from ._callback_context import callback_context  # noqa: F401,E402\n", "issue": "[BUG] dash doesn't get imported when a file named \"org.py\", \"dash.py\", or \"test.py\" with specific content is present in the current directory // \"AttributeError: module 'dash' has no attribute 'Dash'\"\n**Describe your context**\r\n\r\n```\r\ndash (1.9.1)\r\ndash-core-components (1.8.1)\r\ndash-html-components (1.0.2)\r\ndash-renderer (1.2.4)\r\ndash-table (4.6.1)\r\n\r\n```\r\n\r\n**Describe the bug**\r\n\r\nIf a file named ``org.py`` is present in the current directory with the following content:\r\n\r\n```\r\nimport dash_core_components as dcc\r\n```\r\n\r\nthen dash doesn't import and I get the following message:\r\n```\r\n>>> import dash\r\nDash was not successfully imported. Make sure you don't have a file named\r\n'dash.py' in your current directory.\r\n```\r\n\r\n**Expected behavior**\r\ndash should import without any error.\r\n\r\n**Additional info**\r\n- The org.py is never imported\r\n- If I rename the file to a different name dash get imported without any problem.\r\n- The problem is shown also with ``import dash_html_components as html```\r\n- The problem is shown either on Windows and in Linux\r\n- Tested with python3.4, python3.6, python3.8\r\n\r\n**Steps to replicate the problem on Linux**\r\n```\r\n$ mkdir mytest\r\n$ cd mytest\r\n$ echo \"import dash_core_components as dcc\" > org.py\r\n$ python3 -m venv venv\r\n$ . venv/bin/activate\r\n(venv) $ pip install dash\r\n(venv) $ python\r\nPython 3.4.6 (default, Mar 01 2017, 16:52:22) [GCC] on linux\r\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\r\n>>> import dash\r\nDash was not successfully imported. Make sure you don't have a file named\r\n'dash.py' in your current directory.\r\n(venv) $\r\n```\r\n\r\nif I rename the file the import works:\r\n```\r\n(venv) $ mv org.py othername.py\r\n(venv) $ python\r\nPython 3.4.6 (default, Mar 01 2017, 16:52:22) [GCC] on linux\r\nType \"help\", \"copyright\", \"credits\" or \"license\" for more information.\r\n>>> import dash\r\n>>>\r\n```\r\n\n", "before_files": [{"content": "from .dash import Dash, no_update  # noqa: F401\nfrom . import dependencies  # noqa: F401\nfrom . import development  # noqa: F401\nfrom . import exceptions  # noqa: F401\nfrom . import resources  # noqa: F401\nfrom .version import __version__  # noqa: F401\nfrom ._callback_context import callback_context  # noqa: F401\n", "path": "dash/__init__.py"}], "after_files": [{"content": "# pylint: disable=C0413\n# __plotly_dash is for the \"make sure you don't have a dash.py\" check\n# must come before any other imports.\n__plotly_dash = True\nfrom .dash import Dash, no_update  # noqa: F401,E402\nfrom . import dependencies  # noqa: F401,E402\nfrom . import development  # noqa: F401,E402\nfrom . import exceptions  # noqa: F401,E402\nfrom . import resources  # noqa: F401,E402\nfrom .version import __version__  # noqa: F401,E402\nfrom ._callback_context import callback_context  # noqa: F401,E402\n", "path": "dash/__init__.py"}]}