text: #!/usr/bin/env python3
  # -*- coding: utf-8 -*-
  """
      example.py
      ~~~~~~~~~
      A simple command line application to run flask apps.
      :copyright: 2019 Miller
      :license: BSD-3-Clause
  """
  
  # Known bugs that can't be fixed here:
  #   - synopsis() cannot be prevented from clobbering existing
  #     loaded modules.
  #   - If the __file__ attribute on a module is a relative path and
  #     the current directory is changed with os.chdir(), an incorrect
  #     path will be displayed.
  
  import abc
  
  
  # --------------------------------------------------------- common routines
  
  def contains(list_of_items, target_item):
      return (target_item in list_of_items)
  
  
  if __name__ == '__main__':
      pass