old_contents: from __future__ import print_function
  from setuptools import setup, find_packages
  from os.path import join, dirname, abspath
  import sys
  
  
  long_description = ''
  
  if 'upload' in sys.argv or '--long-description' in sys.argv:
      with open('README.rst') as f:
          long_description = f.read()
  
  
  def read_requirements(basename):
      reqs_file = join(dirname(abspath(__file__)), basename)
      with open(reqs_file) as f:
          return [req.strip() for req in f.readlines()]
  
  
  def main():
      reqs = read_requirements('requirements.txt')
      test_reqs = read_requirements('requirements_test.txt')
  
      setup(
          name='pgcontents',
          version='0.5.3',
          description="A Postgres-backed ContentsManager for IPython/Jupyter.",
          long_description=long_description,
          author="Scott Sanderson",
          author_email="ssanderson@quantopian.com",
          packages=find_packages(include='pgcontents.*'),
          license='Apache 2.0',
          include_package_data=True,
          zip_safe=False,
          url="https://github.com/quantopian/pgcontents",
          classifiers=[
              'Development Status :: 4 - Beta',
              'Framework :: IPython',
              'License :: OSI Approved :: Apache Software License',
              'Natural Language :: English',
              'Operating System :: OS Independent',
              'Programming Language :: Python :: 2.7',
              'Programming Language :: Python :: 3.4',
              'Programming Language :: Python',
              'Topic :: Database',
          ],
          install_requires=reqs,
          extras_require={
              'test': test_reqs,
              'ipy3': ['ipython[test,notebook]<4.0', 'tornado<5.0'],
              'ipy4': ['ipython<6.0', 'notebook[test]>=4.0,<5.0', 'tornado<5.0'],
              'ipy6': ['notebook[test]>=5.0']
          },
          scripts=[
              'bin/pgcontents',
          ],
      )
  
  
  if __name__ == '__main__':
      main()
  
new_contents: from __future__ import print_function
  from setuptools import setup, find_packages
  from os.path import join, dirname, abspath
  import sys
  
  
  long_description = ''
  
  if 'upload' in sys.argv or '--long-description' in sys.argv:
      with open('README.rst') as f:
          long_description = f.read()
  
  
  def read_requirements(basename):
      reqs_file = join(dirname(abspath(__file__)), basename)
      with open(reqs_file) as f:
          return [req.strip() for req in f.readlines()]
  
  
  def main():
      reqs = read_requirements('requirements.txt')
      test_reqs = read_requirements('requirements_test.txt')
  
      setup(
          name='pgcontents',
          version='0.5.3',
          description="A Postgres-backed ContentsManager for IPython/Jupyter.",
          long_description=long_description,
          author="Scott Sanderson",
          author_email="ssanderson@quantopian.com",
          packages=find_packages(include='pgcontents.*'),
          license='Apache 2.0',
          include_package_data=True,
          zip_safe=False,
          url="https://github.com/quantopian/pgcontents",
          classifiers=[
              'Development Status :: 4 - Beta'
              'Framework :: IPython',
              'License :: OSI Approved :: Apache Software License',
              'Natural Language :: English',
              'Operating System :: OS Independent',
              'Programming Language :: Python :: 2.7',
              'Programming Language :: Python :: 3.4',
              'Programming Language :: Python',
              'Topic :: Database',
          ],
          install_requires=reqs,
          extras_require={
              'test': test_reqs,
              'ipy3': ['ipython[test,notebook]<4.0', 'tornado<5.0'],
              'notebook4': ['notebook[test]>=4.0,<5.0', 'tornado<5.0'],
              'notebook5': ['notebook[test]>=5.0']
          },
          scripts=[
              'bin/pgcontents',
          ],
      )
  
  
  if __name__ == '__main__':
      main()
  
subject: Remove the ipython dependency for notebook 4 and 5, since it's unneeded (I think). Rename the notebook 4 and 5 installations to reflect the fact that ipython is no longer a dependency.