old_contents: try:
      from setuptools import setup
  except ImportError:
      from ez_setup import use_setuptools
      use_setuptools()
      from setuptools import setup
  
  setup(
      name='Rx',
      version='3.0.0-alpha',
      description='Reactive Extensions (Rx) for Python',
      long_description=(
          "is a library for composing asynchronous and "
          "event-based programs using observable collections and LINQ-style "
          "query operators in Python."),
      author='Dag Brattli',
      author_email='dag@brattli.net',
      license='Apache License',
      url='http://reactivex.io',
      download_url='https://github.com/ReactiveX/RxPY',
      zip_safe=True,
      python_requires='>=3.6.0',
  
      # https://pypi.python.org/pypi?%3Aaction=list_classifiers
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Environment :: Other Environment',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: Apache Software License',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: Implementation :: CPython',
          'Topic :: Software Development :: Libraries :: Python Modules',
      ],
      setup_requires=['pytest-runner'],
      tests_require=['pytest', "pytest-asyncio"],
  
      packages=['rx', 'rx.internal', 'rx.core', 'rx.core.abc',
                'rx.core.operators', 'rx.core.observable', 'rx.core.observer',
                'rx.core.operators.blocking', 'rx.core.operators.connectable',
                'rx.concurrency', 'rx.concurrency.mainloopscheduler',
                'rx.operators', 'rx.disposable', 'rx.subjects',
                'rx.testing'],
      package_dir={'rx': 'rx'},
      include_package_data=True,
  )
  
new_contents: try:
      from setuptools import setup
  except ImportError:
      from ez_setup import use_setuptools
      use_setuptools()
      from setuptools import setup
  
  setup(
      name='Rx',
      version='3.0.0-alpha2',
      description='Reactive Extensions (Rx) for Python',
      long_description=(
          "is a library for composing asynchronous and "
          "event-based programs using observable collections and LINQ-style "
          "query operators in Python."),
      author='Dag Brattli',
      author_email='dag@brattli.net',
      license='Apache License',
      url='http://reactivex.io',
      download_url='https://github.com/ReactiveX/RxPY',
      zip_safe=True,
      python_requires='>=3.6.0',
  
      # https://pypi.python.org/pypi?%3Aaction=list_classifiers
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Environment :: Other Environment',
          'Intended Audience :: Developers',
          'License :: OSI Approved :: Apache Software License',
          'Operating System :: OS Independent',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: Implementation :: CPython',
          'Topic :: Software Development :: Libraries :: Python Modules',
      ],
      setup_requires=['pytest-runner'],
      tests_require=['pytest', "pytest-asyncio"],
  
      packages=['rx', 'rx.internal', 'rx.core', 'rx.core.abc',
                'rx.core.operators', 'rx.core.observable',
                'rx.core.observer', 'rx.core.operators.connectable',
                'rx.concurrency', 'rx.concurrency.mainloopscheduler',
                'rx.operators', 'rx.disposable', 'rx.subjects',
                'rx.testing'],
      package_dir={'rx': 'rx'},
      include_package_data=True,
  )
  
subject: Bump version and fix packages