old_contents: #!/usr/bin/env python3
  import re
  import os.path
  from setuptools import setup, find_packages
  from pip.req import parse_requirements
  
  
  here = os.path.abspath(os.path.dirname(__file__))
  
  readme_path = os.path.join(here, 'README.md')
  with open(readme_path, 'r') as readme_file:
      readme = readme_file.read()
  
  # Borrowed from https://github.com/Gandi/gandi.cli/blob/master/setup.py
  version_path = os.path.join(here, 'wb2k', '__init__.py')
  with open(version_path, 'r') as version_file:
      version = re.compile(r".*__version__ = '(.*?)'",
                           re.S).match(version_file.read()).group(1)
  
  install_reqs = [str(r.req) for r in parse_requirements('requirements.txt', session=False)]
  test_reqs = [str(r.req) for r in parse_requirements('dev-requirements.txt', session=False)]
  
  setup(
      name='wb2k',
      version=version,
      description='Welcome new folks to #general.',
      long_description=readme,
      author='Reilly Tucker Siemens',
      author_email='reilly@tuckersiemens.com',
      url='https://github.com/reillysiemens/wb2k',
      packages=find_packages(),
      package_dir={'wb2k': 'wb2k'},
      include_package_data=True,
      install_requires=install_reqs,
      license='ISCL',
      zip_safe=False,
      py_modules=['wb2k'],
      keywords='welcome bot Slack',
      classifiers=[
          'Development Status :: 2 - Pre-Alpha',
          'Environment :: Console',
          'Intended Audience :: System Administrators',
          'License :: OSI Approved :: ISC License (ISCL)',
          'Natural Language :: English',
          'Operating System :: POSIX :: Linux',
          'Operating System :: POSIX :: BSD :: FreeBSD',
          'Programming Language :: Python :: 3 :: Only',
      ],
      test_suite='tests',
      tests_require=test_reqs,
      extras_require={
          'dev': test_reqs,
      },
      entry_points={
          'console_scripts': [
              'wb2k=wb2k.__main__:cli',
          ],
      },
  )
  
new_contents: #!/usr/bin/env python3
  import re
  import os.path
  import sys
  from setuptools import setup, find_packages
  from pip.req import parse_requirements
  
  if sys.version_info < (3, 6):
      sys.exit('Python 3.6+ is required. Ancient Python is unsupported.')
  
  here = os.path.abspath(os.path.dirname(__file__))
  
  readme_path = os.path.join(here, 'README.md')
  with open(readme_path, 'r') as readme_file:
      readme = readme_file.read()
  
  # Borrowed from https://github.com/Gandi/gandi.cli/blob/master/setup.py
  version_path = os.path.join(here, 'wb2k', '__init__.py')
  with open(version_path, 'r') as version_file:
      version = re.compile(r".*__version__ = '(.*?)'",
                           re.S).match(version_file.read()).group(1)
  
  install_reqs = [str(r.req) for r in parse_requirements('requirements.txt', session=False)]
  test_reqs = [str(r.req) for r in parse_requirements('dev-requirements.txt', session=False)]
  
  setup(
      name='wb2k',
      version=version,
      description='Welcome new folks to #general.',
      long_description=readme,
      author='Reilly Tucker Siemens',
      author_email='reilly@tuckersiemens.com',
      url='https://github.com/reillysiemens/wb2k',
      packages=find_packages(),
      package_dir={'wb2k': 'wb2k'},
      include_package_data=True,
      install_requires=install_reqs,
      license='ISCL',
      zip_safe=False,
      py_modules=['wb2k'],
      keywords='welcome bot Slack',
      classifiers=[
          'Development Status :: 2 - Pre-Alpha',
          'Environment :: Console',
          'Intended Audience :: System Administrators',
          'License :: OSI Approved :: ISC License (ISCL)',
          'Natural Language :: English',
          'Operating System :: POSIX :: Linux',
          'Operating System :: POSIX :: BSD :: FreeBSD',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3 :: Only',
      ],
      test_suite='tests',
      tests_require=test_reqs,
      extras_require={
          'dev': test_reqs,
      },
      entry_points={
          'console_scripts': [
              'wb2k=wb2k.__main__:cli',
          ],
      },
  )
  
subject: Update setup.py to reflect Python 3.6+ requirement