old_contents: #! /usr/bin/env python
  
  from distutils.core import setup
  
  setup(name='oemof.db',
        version='0.0.1dev',
        description='The oemof database extension',
        namespace_package = ['oemof'],
        package_dir={'oemof': 'oemof'},
        install_requires=['sqlalchemy >= 1.0',
                          'keyring >= 4.0'])
  
new_contents: #! /usr/bin/env python
  
  from setuptools import setup
  
  setup(name='oemof.db',
        version='0.0.1dev',
        description='The oemof database extension',
        namespace_package = ['oemof'],
        package_dir={'oemof': 'oemof'},
        install_requires=['sqlalchemy >= 1.0',
                          'keyring >= 4.0'])
  
subject: Use `setuptools` instead of `distutils.core`