old_contents: # pylint: disable=g-bad-file-header
  # Copyright 2019 The dm_env Authors. All Rights Reserved.
  #
  # 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
  #
  #    http://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.
  # ============================================================================
  
  """Install script for setuptools."""
  
  from importlib import util
  from setuptools import find_packages
  from setuptools import setup
  
  
  def get_version():
    spec = util.spec_from_file_location('_metadata', 'dm_env/_metadata.py')
    mod = util.module_from_spec(spec)
    spec.loader.exec_module(mod)
    return mod.__version__
  
  
  setup(
      name='dm-env',
      version=get_version(),
      description='A Python interface for Reinforcement Learning environments.',
      author='DeepMind',
      license='Apache License, Version 2.0',
      keywords='reinforcement-learning python machine learning',
      packages=find_packages(exclude=['examples']),
      install_requires=[
          'absl-py',
          'dm-tree',
          'numpy',
      ],
      tests_require=[
          'nose',
      ],
      test_suite='nose.collector',
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Environment :: Console',
          'Intended Audience :: Science/Research',
          'License :: OSI Approved :: Apache Software License',
          'Operating System :: POSIX :: Linux',
          'Operating System :: Microsoft :: Windows',
          'Operating System :: MacOS :: MacOS X',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
          'Topic :: Scientific/Engineering :: Artificial Intelligence',
      ],
  )
  
new_contents: # pylint: disable=g-bad-file-header
  # Copyright 2019 The dm_env Authors. All Rights Reserved.
  #
  # 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
  #
  #    http://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.
  # ============================================================================
  
  """Install script for setuptools."""
  
  from importlib import util
  from setuptools import find_packages
  from setuptools import setup
  
  
  def get_version():
    spec = util.spec_from_file_location('_metadata', 'dm_env/_metadata.py')
    mod = util.module_from_spec(spec)
    spec.loader.exec_module(mod)
    return mod.__version__
  
  
  setup(
      name='dm-env',
      version=get_version(),
      description='A Python interface for Reinforcement Learning environments.',
      author='DeepMind',
      license='Apache License, Version 2.0',
      keywords='reinforcement-learning python machine learning',
      packages=find_packages(exclude=['examples']),
      install_requires=[
          'absl-py',
          'dm-tree',
          'numpy',
      ],
      tests_require=[
          'nose',
      ],
      test_suite='nose.collector',
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Environment :: Console',
          'Intended Audience :: Science/Research',
          'License :: OSI Approved :: Apache Software License',
          'Operating System :: POSIX :: Linux',
          'Operating System :: Microsoft :: Windows',
          'Operating System :: MacOS :: MacOS X',
          'Programming Language :: Python :: 3.6',
          'Programming Language :: Python :: 3.7',
          'Programming Language :: Python :: 3.8',
          'Programming Language :: Python :: 3.9',
          'Topic :: Scientific/Engineering :: Artificial Intelligence',
      ],
  )
  
subject: Update setup.py