prompt: You will be provided with a partial code base and an issue statement explaining a problem to resolve.
  <issue>
  Add Python 3 to setup.py
  We need to note in the setup.py that Python 3 is supported.
  
  </issue>
  <code>
  [start of setup.py]
  1 """Use the following command to install retriever: python setup.py install"""
  2 from __future__ import absolute_import
  3 
  4 from setuptools import setup
  5 from pkg_resources import parse_version
  6 import platform
  7 
  8 
  9 current_platform = platform.system().lower()
  10 extra_includes = []
  11 if current_platform == "darwin":
  12     try:
  13         import py2app
  14     except ImportError:
  15         pass
  16     extra_includes = []
  17 elif current_platform == "windows":
  18     try:
  19         import py2exe
  20     except ImportError:
  21         pass
  22     import sys
  23     extra_includes = ['pyodbc', 'inspect']
  24     sys.path.append(
  25         "C:\\Windows\\winsxs\\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.21022.8_none_bcb86ed6ac711f91")
  26 
  27 __version__ = 'v2.0.dev'
  28 with open("_version.py", "w") as version_file:
  29     version_file.write("__version__ = " + "'" + __version__ + "'\n")
  30     version_file.close()
  31 
  32 
  33 def clean_version(v):
  34     return parse_version(v).__repr__().lstrip("<Version('").rstrip("')>")
  35 
  36 packages = [
  37     'retriever.lib',
  38     'retriever.engines',
  39     'retriever',
  40 ]
  41 
  42 includes = [
  43     'xlrd',
  44     'future'
  45     'pymysql',
  46     'psycopg2',
  47     'sqlite3',
  48 ] + extra_includes
  49 
  50 excludes = [
  51     'pyreadline',
  52     'doctest',
  53     'optparse',
  54     'getopt',
  55     'pickle',
  56     'calendar',
  57     'pdb',
  58     'inspect',
  59     'email',
  60     'pywin', 'pywin.debugger',
  61     'pywin.debugger.dbgcon',
  62     'pywin.dialogs', 'pywin.dialogs.list',
  63     'Tkconstants', 'Tkinter', 'tcl',
  64 ]
  65 
  66 setup(name='retriever',
  67       version=clean_version(__version__),
  68       description='Data Retriever',
  69       author='Ben Morris, Ethan White, Henry Senyondo',
  70       author_email='ethan@weecology.org',
  71       url='https://github.com/weecology/retriever',
  72       classifiers=['Intended Audience :: Science/Research',
  73                    'License :: OSI Approved :: MIT License',
  74                    'Programming Language :: Python',
  75                    'Programming Language :: Python :: 2', ],
  76       packages=packages,
  77       package_dir={
  78           'retriever': ''
  79       },
  80       entry_points={
  81           'console_scripts': [
  82               'retriever = retriever.__main__:main',
  83           ],
  84       },
  85       install_requires=[
  86           'xlrd',
  87           'future'
  88       ],
  89 
  90       # py2exe flags
  91       console=[{'script': "__main__.py",
  92                 'dest_base': "retriever",
  93                 'icon_resources': [(1, 'icon.ico')]
  94                 }],
  95       zipfile=None,
  96 
  97       # py2app flags
  98       app=['__main__.py'],
  99       data_files=[('', ['CITATION'])],
  100       setup_requires=['py2app'] if current_platform == 'darwin' else [],
  101 
  102       # options
  103       # optimize is set to 1 of py2app to avoid errors with pymysql
  104       # bundle_files = 1 or 2 was causing failed builds so we moved
  105       # to bundle_files = 3 and Inno Setup
  106       options={'py2exe': {'bundle_files': 3,
  107                           'compressed': 2,
  108                           'optimize': 1,
  109                           'packages': packages,
  110                           'includes': includes,
  111                           'excludes': excludes,
  112                           },
  113                'py2app': {'packages': ['retriever'],
  114                           'includes': includes,
  115                           'site_packages': True,
  116                           'resources': [],
  117                           'optimize': 1,
  118                           'argv_emulation': True,
  119                           'no_chdir': True,
  120                           'iconfile': 'osx_icon.icns',
  121                           },
  122                },
  123       )
  124 
  125 
  126 try:
  127     from retriever.compile import compile
  128     from retriever.lib.repository import check_for_updates
  129     compile()
  130     check_for_updates()
  131 except:
  132     pass
  133
  [end of setup.py]
  </code>
  
  I need you to solve this issue by generating a single patch file that I can apply directly to this repository using git apply. Please respond with a single patch file in the following format.
  <patch>
  diff --git a/file.py b/file.py
  --- a/file.py
  +++ b/file.py
  @@ -1,27 +1,35 @@
   def euclidean(a, b):
  -    while b:
  -        a, b = b, a % b
  -    return a
  +    if b == 0:
  +        return a
  +    return euclidean(b, a % b)
   
   
   def bresenham(x0, y0, x1, y1):
       points = []
       dx = abs(x1 - x0)
       dy = abs(y1 - y0)
  -    sx = 1 if x0 < x1 else -1
  -    sy = 1 if y0 < y1 else -1
  -    err = dx - dy
  +    x, y = x0, y0
  +    sx = -1 if x0 > x1 else 1
  +    sy = -1 if y0 > y1 else 1
   
  -    while True:
  -        points.append((x0, y0))
  -        if x0 == x1 and y0 == y1:
  -            break
  -        e2 = 2 * err
  -        if e2 > -dy:
  -            err -= dy
  -            x0 += sx
  -        if e2 < dx:
  -            err += dx
  -            y0 += sy
  +    if dx > dy:
  +        err = dx / 2.0
  +        while x != x1:
  +            points.append((x, y))
  +            err -= dy
  +            if err < 0:
  +                y += sy
  +                err += dx
  +            x += sx
  +    else:
  +        err = dy / 2.0
  +        while y != y1:
  +            points.append((x, y))
  +            err -= dx
  +            if err < 0:
  +                x += sx
  +                err += dy
  +            y += sy
  +
  +    points.append((x, y))
       return points
  
  </patch>
golden_diff: diff --git a/setup.py b/setup.py
  --- a/setup.py
  +++ b/setup.py
  @@ -72,7 +72,8 @@
         classifiers=['Intended Audience :: Science/Research',
                      'License :: OSI Approved :: MIT License',
                      'Programming Language :: Python',
  -                   'Programming Language :: Python :: 2', ],
  +                   'Programming Language :: Python :: 2',
  +                   'Programming Language :: Python :: 3',],
         packages=packages,
         package_dir={
             'retriever': ''
  
verification_info: {"golden_diff": "diff --git a/setup.py b/setup.py\n--- a/setup.py\n+++ b/setup.py\n@@ -72,7 +72,8 @@\n       classifiers=['Intended Audience :: Science/Research',\n                    'License :: OSI Approved :: MIT License',\n                    'Programming Language :: Python',\n-                   'Programming Language :: Python :: 2', ],\n+                   'Programming Language :: Python :: 2',\n+                   'Programming Language :: Python :: 3',],\n       packages=packages,\n       package_dir={\n           'retriever': ''\n", "issue": "Add Python 3 to setup.py\nWe need to note in the setup.py that Python 3 is supported.\n", "before_files": [{"content": "\"\"\"Use the following command to install retriever: python setup.py install\"\"\"\nfrom __future__ import absolute_import\n\nfrom setuptools import setup\nfrom pkg_resources import parse_version\nimport platform\n\n\ncurrent_platform = platform.system().lower()\nextra_includes = []\nif current_platform == \"darwin\":\n    try:\n        import py2app\n    except ImportError:\n        pass\n    extra_includes = []\nelif current_platform == \"windows\":\n    try:\n        import py2exe\n    except ImportError:\n        pass\n    import sys\n    extra_includes = ['pyodbc', 'inspect']\n    sys.path.append(\n        \"C:\\\\Windows\\\\winsxs\\\\x86_microsoft.vc90.crt_1fc8b3b9a1e18e3b_9.0.21022.8_none_bcb86ed6ac711f91\")\n\n__version__ = 'v2.0.dev'\nwith open(\"_version.py\", \"w\") as version_file:\n    version_file.write(\"__version__ = \" + \"'\" + __version__ + \"'\\n\")\n    version_file.close()\n\n\ndef clean_version(v):\n    return parse_version(v).__repr__().lstrip(\"<Version('\").rstrip(\"')>\")\n\npackages = [\n    'retriever.lib',\n    'retriever.engines',\n    'retriever',\n]\n\nincludes = [\n    'xlrd',\n    'future'\n    'pymysql',\n    'psycopg2',\n    'sqlite3',\n] + extra_includes\n\nexcludes = [\n    'pyreadline',\n    'doctest',\n    'optparse',\n    'getopt',\n    'pickle',\n    'calendar',\n    'pdb',\n    'inspect',\n    'email',\n    'pywin', 'pywin.debugger',\n    'pywin.debugger.dbgcon',\n    'pywin.dialogs', 'pywin.dialogs.list',\n    'Tkconstants', 'Tkinter', 'tcl',\n]\n\nsetup(name='retriever',\n      version=clean_version(__version__),\n      description='Data Retriever',\n      author='Ben Morris, Ethan White, Henry Senyondo',\n      author_email='ethan@weecology.org',\n      url='https://github.com/weecology/retriever',\n      classifiers=['Intended Audience :: Science/Research',\n                   'License :: OSI Approved :: MIT License',\n                   'Programming Language :: Python',\n                   'Programming Language :: Python :: 2', ],\n      packages=packages,\n      package_dir={\n          'retriever': ''\n      },\n      entry_points={\n          'console_scripts': [\n              'retriever = retriever.__main__:main',\n          ],\n      },\n      install_requires=[\n          'xlrd',\n          'future'\n      ],\n\n      # py2exe flags\n      console=[{'script': \"__main__.py\",\n                'dest_base': \"retriever\",\n                'icon_resources': [(1, 'icon.ico')]\n                }],\n      zipfile=None,\n\n      # py2app flags\n      app=['__main__.py'],\n      data_files=[('', ['CITATION'])],\n      setup_requires=['py2app'] if current_platform == 'darwin' else [],\n\n      # options\n      # optimize is set to 1 of py2app to avoid errors with pymysql\n      # bundle_files = 1 or 2 was causing failed builds so we moved\n      # to bundle_files = 3 and Inno Setup\n      options={'py2exe': {'bundle_files': 3,\n                          'compressed': 2,\n                          'optimize': 1,\n                          'packages': packages,\n                          'includes': includes,\n                          'excludes': excludes,\n                          },\n               'py2app': {'packages': ['retriever'],\n                          'includes': includes,\n                          'site_packages': True,\n                          'resources': [],\n                          'optimize': 1,\n                          'argv_emulation': True,\n                          'no_chdir': True,\n                          'iconfile': 'osx_icon.icns',\n                          },\n               },\n      )\n\n\ntry:\n    from retriever.compile import compile\n    from retriever.lib.repository import check_for_updates\n    compile()\n    check_for_updates()\nexcept:\n    pass\n", "path": "setup.py"}]}