old_contents: # Copyright 2018 The Cirq Developers
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import io
  import os
  from setuptools import find_packages, setup
  
  # This reads the __version__ variable from cirq/_version.py
  __version__ = ''
  exec(open('cirq/_version.py').read())
  
  name = 'cirq-core'
  
  description = (
      'A framework for creating, editing, and invoking '
      'Noisy Intermediate Scale Quantum (NISQ) circuits.'
  )
  
  # README file as long_description.
  long_description = io.open('README.rst', encoding='utf-8').read()
  
  # If CIRQ_PRE_RELEASE_VERSION is set then we update the version to this value.
  # It is assumed that it ends with one of `.devN`, `.aN`, `.bN`, `.rcN` and hence
  # it will be a pre-release version on PyPi. See
  # https://packaging.python.org/guides/distributing-packages-using-setuptools/#pre-release-versioning
  # for more details.
  if 'CIRQ_PRE_RELEASE_VERSION' in os.environ:
      __version__ = os.environ['CIRQ_PRE_RELEASE_VERSION']
      long_description = (
          "**This is a development version of Cirq-core and may be "
          "unstable.**\n\n**For the latest stable release of Cirq-core "
          "see**\n`here <https://pypi.org/project/cirq-core>`__.\n\n" + long_description
      )
  
  # Read in requirements
  requirements = open('requirements.txt').readlines()
  requirements = [r.strip() for r in requirements]
  contrib_requirements = open('cirq/contrib/contrib-requirements.txt').readlines()
  contrib_requirements = [r.strip() for r in contrib_requirements]
  
  
  cirq_packages = ['cirq'] + [
      'cirq.' + package for package in find_packages(where='cirq', exclude=['google', 'google.*'])
  ]
  
  # Sanity check
  assert __version__, 'Version string cannot be empty'
  
  setup(
      name=name,
      version=__version__,
      url='http://github.com/quantumlib/cirq',
      author='The Cirq Developers',
      author_email='cirq-dev@googlegroups.com',
      python_requires=('>=3.6.0'),
      install_requires=requirements,
      extras_require={
          'contrib': contrib_requirements,
      },
      license='Apache 2',
      description=description,
      long_description=long_description,
      packages=cirq_packages,
      package_data={
          'cirq': ['py.typed'],
          'cirq.protocols.json_test_data': ['*'],
      },
  )
  
new_contents: # Copyright 2018 The Cirq Developers
  #
  # Licensed under the Apache License, Version 2.0 (the "License");
  # you may not use this file except in compliance with the License.
  # You may obtain a copy of the License at
  #
  #     https://www.apache.org/licenses/LICENSE-2.0
  #
  # Unless required by applicable law or agreed to in writing, software
  # distributed under the License is distributed on an "AS IS" BASIS,
  # WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  # See the License for the specific language governing permissions and
  # limitations under the License.
  
  import io
  import os
  from setuptools import find_packages, setup
  
  # This reads the __version__ variable from cirq/_version.py
  __version__ = ''
  exec(open('cirq/_version.py').read())
  
  name = 'cirq-core'
  
  description = (
      'A framework for creating, editing, and invoking '
      'Noisy Intermediate Scale Quantum (NISQ) circuits.'
  )
  
  # README file as long_description.
  long_description = io.open('README.rst', encoding='utf-8').read()
  
  # If CIRQ_PRE_RELEASE_VERSION is set then we update the version to this value.
  # It is assumed that it ends with one of `.devN`, `.aN`, `.bN`, `.rcN` and hence
  # it will be a pre-release version on PyPi. See
  # https://packaging.python.org/guides/distributing-packages-using-setuptools/#pre-release-versioning
  # for more details.
  if 'CIRQ_PRE_RELEASE_VERSION' in os.environ:
      __version__ = os.environ['CIRQ_PRE_RELEASE_VERSION']
      long_description = (
          "**This is a development version of Cirq-core and may be "
          "unstable.**\n\n**For the latest stable release of Cirq-core "
          "see**\n`here <https://pypi.org/project/cirq-core>`__.\n\n" + long_description
      )
  
  # Read in requirements
  requirements = open('requirements.txt').readlines()
  requirements = [r.strip() for r in requirements]
  contrib_requirements = open('cirq/contrib/requirements.txt').readlines()
  contrib_requirements = [r.strip() for r in contrib_requirements]
  
  
  cirq_packages = ['cirq'] + [
      'cirq.' + package for package in find_packages(where='cirq', exclude=['google', 'google.*'])
  ]
  
  # Sanity check
  assert __version__, 'Version string cannot be empty'
  
  setup(
      name=name,
      version=__version__,
      url='http://github.com/quantumlib/cirq',
      author='The Cirq Developers',
      author_email='cirq-dev@googlegroups.com',
      python_requires=('>=3.6.0'),
      install_requires=requirements,
      extras_require={
          'contrib': contrib_requirements,
      },
      license='Apache 2',
      description=description,
      long_description=long_description,
      packages=cirq_packages,
      package_data={
          'cirq': ['py.typed'],
          'cirq.protocols.json_test_data': ['*'],
      },
  )
  
subject: Fix contrib-requirements (#4155)