old_contents: import re
  
  from setuptools import setup
  
  
  def get_version(filename):
      with open(filename, 'r') as fp:
          contents = fp.read()
      return re.search(r"__version__ = ['\"]([^'\"]+)['\"]", contents).group(1)
  
  
  version = get_version('flake8_tidy_imports.py')
  
  with open('README.rst', 'r') as readme_file:
      readme = readme_file.read()
  
  with open('HISTORY.rst', 'r') as history_file:
      history = history_file.read()
  
  setup(
      name='flake8-tidy-imports',
      version=version,
      description="A flake8 plugin that helps you write tidier imports.",
      long_description=readme + '\n\n' + history,
      author="Adam Johnson",
      author_email='me@adamj.eu',
      url='https://github.com/adamchainz/flake8-tidy-imports',
      entry_points={
          'flake8.extension': [
              'I20 = '
              'flake8_tidy_imports:ImportChecker',
          ],
      },
      py_modules=['flake8_tidy_imports'],
      include_package_data=True,
      install_requires=[
          'flake8!=3.2.0',
      ],
      python_requires='>=3.4',
      license="ISCL",
      zip_safe=False,
      keywords='flake8_tidy_imports',
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Framework :: Flake8',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: ISC License (ISCL)',
          'Natural Language :: English',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: 3.5',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
      ],
  )
  
new_contents: import re
  
  from setuptools import setup
  
  
  def get_version(filename):
      with open(filename, 'r') as fp:
          contents = fp.read()
      return re.search(r"__version__ = ['\"]([^'\"]+)['\"]", contents).group(1)
  
  
  version = get_version('flake8_tidy_imports.py')
  
  with open('README.rst', 'r') as readme_file:
      readme = readme_file.read()
  
  with open('HISTORY.rst', 'r') as history_file:
      history = history_file.read()
  
  setup(
      name='flake8-tidy-imports',
      version=version,
      description="A flake8 plugin that helps you write tidier imports.",
      long_description=readme + '\n\n' + history,
      author="Adam Johnson",
      author_email='me@adamj.eu',
      url='https://github.com/adamchainz/flake8-tidy-imports',
      entry_points={
          'flake8.extension': [
              'I20 = '
              'flake8_tidy_imports:ImportChecker',
          ],
      },
      py_modules=['flake8_tidy_imports'],
      include_package_data=True,
      install_requires=[
          'flake8!=3.2.0',
      ],
      python_requires='>=3.4',
      license="ISCL",
      zip_safe=False,
      keywords='flake8_tidy_imports',
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Framework :: Flake8',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: ISC License (ISCL)',
          'Natural Language :: English',
          'Programming Language :: Python :: 3 :: Only',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: 3.5',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
      ],
  )
  
subject: Add Python 3 Only Classifier (#133)