old_contents: from setuptools import setup, find_packages
  setup(
    name='guestbook',
    version='1.0.0',
    packages=find_packages(),
    include_package_data=True,
    install_requires=[
      'Flask',
    ],
  )
  
new_contents: from setuptools import setup, find_packages
  
  setup(
    name='guestbook',
    version='1.0.0',
    packages=find_packages(),
    include_package_data=True,
    install_requires=[
      'Flask',
    ],
    entry_points="""
      [console_scripts]
      guestbook = guestbook:main
    """,
  )
  
subject: Add entry_points to setup.py