old_contents: from distutils.core import setup
  
  setup(
      name='visits-detector',
      version='',
      packages=['visits_detector'],
      url='',
      license='',
      author='Alexander Fridman',
      author_email='alexfridman@outlook.com',
      description=''
  )
  
new_contents: from setuptools import setup, find_packages
  
  setup(
      name='visits-detector',
      version='',
      packages=find_packages(),
      url='',
      license='',
      author='Alexander Fridman',
      author_email='alexfridman@outlook.com',
      description=''
  )
  
subject: Add setup.py