old_contents: from setuptools import setup
  
  
  setup(
      name='shub',
      version='1.3.0',
      packages=['shub'],
      url='https://doc.scrapinghub.com/shub.html',
      description='Scrapinghub Command Line Client',
      long_description=open('README.rst').read(),
      author='Scrapinghub',
      author_email='info@scrapinghub.com',
      maintainer='Scrapinghub',
      maintainer_email='info@scrapinghub.com',
      license='BSD',
      entry_points={
          'console_scripts': ['shub = shub.tool:cli']
      },
      include_package_data=True,
      zip_safe=False,
      install_requires=['click', 'requests'],
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Intended Audience :: Developers',
          'Natural Language :: English',
          'License :: OSI Approved :: BSD License',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2.7',
          'Operating System :: OS Independent',
          'Environment :: Console',
          'Topic :: Internet :: WWW/HTTP',
      ],
      test_suite='tests',
      tests_require=['mock']
  )
  
new_contents: from setuptools import setup
  
  
  setup(
      name='shub',
      version='1.3.0',
      packages=['shub'],
      url='https://doc.scrapinghub.com/shub.html',
      description='Scrapinghub Command Line Client',
      long_description=open('README.rst').read(),
      author='Scrapinghub',
      author_email='info@scrapinghub.com',
      maintainer='Scrapinghub',
      maintainer_email='info@scrapinghub.com',
      license='BSD',
      entry_points={
          'console_scripts': ['shub = shub.tool:cli']
      },
      include_package_data=True,
      zip_safe=False,
      install_requires=['click', 'requests', 'six'],
      classifiers=[
          'Development Status :: 5 - Production/Stable',
          'Intended Audience :: Developers',
          'Natural Language :: English',
          'License :: OSI Approved :: BSD License',
          'Programming Language :: Python',
          'Programming Language :: Python :: 2.7',
          'Operating System :: OS Independent',
          'Environment :: Console',
          'Topic :: Internet :: WWW/HTTP',
      ],
      test_suite='tests',
      tests_require=['mock']
  )
  
subject: Add six to setup.py's install_requires