old_contents: from distutils.core import setup
  
  setup(
      name="PyTips",
      version="0.1.0-alpha.1",
      packages=["pytips"],
      license="ISC",
      long_description=open("README.md").read(),
  )
  
new_contents: from setuptools import setup
  
  
  setup(
      name="PyTips",
      version="0.1.0-alpha.1",
      packages=["pytips"],
      license="ISC",
      long_description=open("README.md").read(),
  )
  
subject: Use "setuptools" so I can use development mode.