old_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from __future__ import division, print_function, unicode_literals
  
  from setuptools import setup
  # from pip.req import parse_requirements
  
  
  setup(
      name='scientific_python',
      version='0.0.0',
      url='https://xray.sai.msu.ru/~malanchev/',
      license='MIT',
      author='Konstantin Malanchev',
      author_email='malanchev@physics.msu.ru',
      description='Package with materials for Scientific Python course for astronomers in Moscow University',
      packages=['scientific_python'],
  #     install_reqs=parse_requirements('requirements.txt', session='hack'),
  #     scripts=['bin/script'],
  #     test_suite='scientific_python_sai.test.suite',
  )
  
new_contents: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  
  from __future__ import division, print_function, unicode_literals
  
  from setuptools import setup
  # from pip.req import parse_requirements
  
  
  setup(
      name='scientific_python',
      version='0.0.0',
      url='https://xray.sai.msu.ru/~malanchev/',
      license='MIT',
      author='Konstantin Malanchev',
      author_email='malanchev@physics.msu.ru',
      description='Package with materials for Scientific Python course for astronomers in Moscow University',
      packages=['scientific_python'],
  #     install_reqs=parse_requirements('requirements.txt', session='hack'),
  #     scripts=['bin/script'],
  #     test_suite='scientific_python_sai.test.suite',
      classifiers=[
          'Intended Audience :: Education',
          'License :: OSI Approved :: MIT License',
          'Topic :: Education',
  
          'Programming Language :: Python :: 2',
          'Programming Language :: Python :: 2.7',
          'Programming Language :: Python :: 3',
          'Programming Language :: Python :: 3.3',
          'Programming Language :: Python :: 3.4',
          'Programming Language :: Python :: 3.5',
          'Programming Language :: Python :: 3.6',
      ],
      keywords='sample education',
  )
  
subject: Add classifiers to setup.py