prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  errors in balanced_parentheses.py
  https://github.com/TheAlgorithms/Python/blob/6a95bf9ad8090a1280abf76752a52ab9ee2420b7/data_structures/stacks/balanced_parentheses.py#L13-L17
  
  `Line 16` returns wrong result due to `not`
  
  `Line 15` can cause error for inputs like **))**. before calling _pop_ it should be checked if stack is empty.
  
  https://github.com/TheAlgorithms/Python/blob/6a95bf9ad8090a1280abf76752a52ab9ee2420b7/data_structures/stacks/balanced_parentheses.py#L3
  
  there is no module named **.Stack**. it should be
   _from **s**tack import Stack_
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `data_structures/stacks/balanced_parentheses.py`
  Content:
  ```
  1 from __future__ import print_function
  2 from __future__ import absolute_import
  3 from .Stack import Stack
  4 
  5 __author__ = 'Omkar Pathak'
  6 
  7 
  8 def balanced_parentheses(parentheses):
  9     """ Use a stack to check if a string of parentheses is balanced."""
  10     stack = Stack(len(parentheses))
  11     for parenthesis in parentheses:
  12         if parenthesis == '(':
  13             stack.push(parenthesis)
  14         elif parenthesis == ')':
  15             stack.pop()
  16     return not stack.is_empty()
  17 
  18 
  19 if __name__ == '__main__':
  20     examples = ['((()))', '((())']
  21     print('Balanced parentheses demonstration:\n')
  22     for example in examples:
  23         print(example + ': ' + str(balanced_parentheses(example)))
  24
  ```
  --- 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/data_structures/stacks/balanced_parentheses.py b/data_structures/stacks/balanced_parentheses.py
  --- a/data_structures/stacks/balanced_parentheses.py
  +++ b/data_structures/stacks/balanced_parentheses.py
  @@ -1,6 +1,6 @@
   from __future__ import print_function
   from __future__ import absolute_import
  -from .Stack import Stack
  +from stack import Stack
   
   __author__ = 'Omkar Pathak'
   
  @@ -12,12 +12,14 @@
           if parenthesis == '(':
               stack.push(parenthesis)
           elif parenthesis == ')':
  +            if stack.is_empty():
  +                return False
               stack.pop()
  -    return not stack.is_empty()
  +    return stack.is_empty()
   
   
   if __name__ == '__main__':
  -    examples = ['((()))', '((())']
  +    examples = ['((()))', '((())', '(()))']
       print('Balanced parentheses demonstration:\n')
       for example in examples:
           print(example + ': ' + str(balanced_parentheses(example)))
  
verification_info: {"golden_diff": "diff --git a/data_structures/stacks/balanced_parentheses.py b/data_structures/stacks/balanced_parentheses.py\n--- a/data_structures/stacks/balanced_parentheses.py\n+++ b/data_structures/stacks/balanced_parentheses.py\n@@ -1,6 +1,6 @@\n from __future__ import print_function\n from __future__ import absolute_import\n-from .Stack import Stack\n+from stack import Stack\n \n __author__ = 'Omkar Pathak'\n \n@@ -12,12 +12,14 @@\n         if parenthesis == '(':\n             stack.push(parenthesis)\n         elif parenthesis == ')':\n+            if stack.is_empty():\n+                return False\n             stack.pop()\n-    return not stack.is_empty()\n+    return stack.is_empty()\n \n \n if __name__ == '__main__':\n-    examples = ['((()))', '((())']\n+    examples = ['((()))', '((())', '(()))']\n     print('Balanced parentheses demonstration:\\n')\n     for example in examples:\n         print(example + ': ' + str(balanced_parentheses(example)))\n", "issue": "errors in balanced_parentheses.py\nhttps://github.com/TheAlgorithms/Python/blob/6a95bf9ad8090a1280abf76752a52ab9ee2420b7/data_structures/stacks/balanced_parentheses.py#L13-L17\r\n\r\n`Line 16` returns wrong result due to `not`\r\n\r\n`Line 15` can cause error for inputs like **))**. before calling _pop_ it should be checked if stack is empty.\r\n\r\nhttps://github.com/TheAlgorithms/Python/blob/6a95bf9ad8090a1280abf76752a52ab9ee2420b7/data_structures/stacks/balanced_parentheses.py#L3\r\n\r\nthere is no module named **.Stack**. it should be\r\n _from **s**tack import Stack_\n", "before_files": [{"content": "from __future__ import print_function\nfrom __future__ import absolute_import\nfrom .Stack import Stack\n\n__author__ = 'Omkar Pathak'\n\n\ndef balanced_parentheses(parentheses):\n    \"\"\" Use a stack to check if a string of parentheses is balanced.\"\"\"\n    stack = Stack(len(parentheses))\n    for parenthesis in parentheses:\n        if parenthesis == '(':\n            stack.push(parenthesis)\n        elif parenthesis == ')':\n            stack.pop()\n    return not stack.is_empty()\n\n\nif __name__ == '__main__':\n    examples = ['((()))', '((())']\n    print('Balanced parentheses demonstration:\\n')\n    for example in examples:\n        print(example + ': ' + str(balanced_parentheses(example)))\n", "path": "data_structures/stacks/balanced_parentheses.py"}], "after_files": [{"content": "from __future__ import print_function\nfrom __future__ import absolute_import\nfrom stack import Stack\n\n__author__ = 'Omkar Pathak'\n\n\ndef balanced_parentheses(parentheses):\n    \"\"\" Use a stack to check if a string of parentheses is balanced.\"\"\"\n    stack = Stack(len(parentheses))\n    for parenthesis in parentheses:\n        if parenthesis == '(':\n            stack.push(parenthesis)\n        elif parenthesis == ')':\n            if stack.is_empty():\n                return False\n            stack.pop()\n    return stack.is_empty()\n\n\nif __name__ == '__main__':\n    examples = ['((()))', '((())', '(()))']\n    print('Balanced parentheses demonstration:\\n')\n    for example in examples:\n        print(example + ': ' + str(balanced_parentheses(example)))\n", "path": "data_structures/stacks/balanced_parentheses.py"}]}