old_contents: #   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.
  from builtins import open
  
  import os
  
  from setuptools import setup, find_packages
  
  
  # This reads the __version__ variable from openfermion/_version.py
  exec(open('src/openfermion/_version.py').read())
  
  # Readme file as long_description:
  long_description = open('README.rst', encoding='utf-8').read()
  
  # Read in requirements.txt
  requirements = open('requirements.txt').readlines()
  requirements = [r.strip() for r in requirements]
  
  setup(
      name='openfermion',
      version=__version__,
      author='The OpenFermion Developers',
      author_email='help@openfermion.org',
      url='http://www.openfermion.org',
      description=('The electronic structure package for quantum computers.'),
      long_description=long_description,
      install_requires=requirements,
      license='Apache 2',
      packages=find_packages(where='src'),
      package_dir={'': 'src'},
      include_package_data=True,
      package_data={
          '': [os.path.join('src', 'openfermion', 'data', '*.hdf5'),
               os.path.join('src', 'openfermion', 'data', '*.npy')]
      })
  
new_contents: #   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.
  import io
  import os
  
  from setuptools import setup, find_packages
  
  
  # This reads the __version__ variable from openfermion/_version.py
  exec(open('src/openfermion/_version.py').read())
  
  # Readme file as long_description:
  long_description = io.open('README.rst', encoding='utf-8').read()
  
  # Read in requirements.txt
  requirements = open('requirements.txt').readlines()
  requirements = [r.strip() for r in requirements]
  
  setup(
      name='openfermion',
      version=__version__,
      author='The OpenFermion Developers',
      author_email='help@openfermion.org',
      url='http://www.openfermion.org',
      description=('The electronic structure package for quantum computers.'),
      long_description=long_description,
      install_requires=requirements,
      license='Apache 2',
      packages=find_packages(where='src'),
      package_dir={'': 'src'},
      include_package_data=True,
      package_data={
          '': [os.path.join('src', 'openfermion', 'data', '*.hdf5'),
               os.path.join('src', 'openfermion', 'data', '*.npy')]
      })
  
subject: Use io to fix dependency in setup.py (#298)