prompt: We are currently solving the following issue within our repository. Here is the issue text:
  --- BEGIN ISSUE ---
  Support Python versions lower than 2.7, too
  
  
  --- END ISSUE ---
  
  Below are some code segments, each from a relevant file. One or more of these files may contain bugs.
  --- BEGIN FILES ---
  Path: `setup.py`
  Content:
  ```
  1 """
  2 pip-tools keeps your pinned dependencies fresh.
  3 """
  4 import sys
  5 from setuptools import setup
  6 
  7 
  8 setup(
  9     name='pip-tools',
  10     version='0.2',
  11     url='https://github.com/nvie/pip-tools/',
  12     license='BSD',
  13     author='Vincent Driessen',
  14     author_email='vincent@3rdcloud.com',
  15     description=__doc__,
  16     #packages=[],
  17     scripts=['bin/pip-review', 'bin/pip-dump'],
  18     #include_package_data=True,
  19     zip_safe=False,
  20     platforms='any',
  21     #install_requires=[],
  22     classifiers=[
  23         # As from http://pypi.python.org/pypi?%3Aaction=list_classifiers
  24         #'Development Status :: 1 - Planning',
  25         #'Development Status :: 2 - Pre-Alpha',
  26         #'Development Status :: 3 - Alpha',
  27         'Development Status :: 4 - Beta',
  28         #'Development Status :: 5 - Production/Stable',
  29         #'Development Status :: 6 - Mature',
  30         #'Development Status :: 7 - Inactive',
  31         'Intended Audience :: Developers',
  32         'Intended Audience :: System Administrators',
  33         'License :: OSI Approved :: BSD License',
  34         'Operating System :: OS Independent',
  35         'Topic :: System :: Systems Administration',
  36     ]
  37 )
  38
  ```
  --- 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/setup.py b/setup.py
  --- a/setup.py
  +++ b/setup.py
  @@ -18,7 +18,7 @@
       #include_package_data=True,
       zip_safe=False,
       platforms='any',
  -    #install_requires=[],
  +    install_requires=['argparse==1.2.1'],  # needed for python 2.6
       classifiers=[
           # As from http://pypi.python.org/pypi?%3Aaction=list_classifiers
           #'Development Status :: 1 - Planning',
  
verification_info: {"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -18,7 +18,7 @@\n     #include_package_data=True,\n     zip_safe=False,\n     platforms='any',\n-    #install_requires=[],\n+    install_requires=['argparse==1.2.1'],  # needed for python 2.6\n     classifiers=[\n         # As from http://pypi.python.org/pypi?%3Aaction=list_classifiers\n         #'Development Status :: 1 - Planning',\n", "issue": "Support Python versions lower than 2.7, too\n\n", "before_files": [{"content": "\"\"\"\npip-tools keeps your pinned dependencies fresh.\n\"\"\"\nimport sys\nfrom setuptools import setup\n\n\nsetup(\n    name='pip-tools',\n    version='0.2',\n    url='https://github.com/nvie/pip-tools/',\n    license='BSD',\n    author='Vincent Driessen',\n    author_email='vincent@3rdcloud.com',\n    description=__doc__,\n    #packages=[],\n    scripts=['bin/pip-review', 'bin/pip-dump'],\n    #include_package_data=True,\n    zip_safe=False,\n    platforms='any',\n    #install_requires=[],\n    classifiers=[\n        # As from http://pypi.python.org/pypi?%3Aaction=list_classifiers\n        #'Development Status :: 1 - Planning',\n        #'Development Status :: 2 - Pre-Alpha',\n        #'Development Status :: 3 - Alpha',\n        'Development Status :: 4 - Beta',\n        #'Development Status :: 5 - Production/Stable',\n        #'Development Status :: 6 - Mature',\n        #'Development Status :: 7 - Inactive',\n        'Intended Audience :: Developers',\n        'Intended Audience :: System Administrators',\n        'License :: OSI Approved :: BSD License',\n        'Operating System :: OS Independent',\n        'Topic :: System :: Systems Administration',\n    ]\n)\n", "path": "setup.py"}], "after_files": [{"content": "\"\"\"\npip-tools keeps your pinned dependencies fresh.\n\"\"\"\nimport sys\nfrom setuptools import setup\n\n\nsetup(\n    name='pip-tools',\n    version='0.2',\n    url='https://github.com/nvie/pip-tools/',\n    license='BSD',\n    author='Vincent Driessen',\n    author_email='vincent@3rdcloud.com',\n    description=__doc__,\n    #packages=[],\n    scripts=['bin/pip-review', 'bin/pip-dump'],\n    #include_package_data=True,\n    zip_safe=False,\n    platforms='any',\n    install_requires=['argparse==1.2.1'],  # needed for python 2.6\n    classifiers=[\n        # As from http://pypi.python.org/pypi?%3Aaction=list_classifiers\n        #'Development Status :: 1 - Planning',\n        #'Development Status :: 2 - Pre-Alpha',\n        #'Development Status :: 3 - Alpha',\n        'Development Status :: 4 - Beta',\n        #'Development Status :: 5 - Production/Stable',\n        #'Development Status :: 6 - Mature',\n        #'Development Status :: 7 - Inactive',\n        'Intended Audience :: Developers',\n        'Intended Audience :: System Administrators',\n        'License :: OSI Approved :: BSD License',\n        'Operating System :: OS Independent',\n        'Topic :: System :: Systems Administration',\n    ]\n)\n", "path": "setup.py"}]}