old_contents: #!/usr/bin/env python3
  from pegasus import app
  
  app.run(debug=True)
  
new_contents: #!/usr/bin/env python3
  import argparse
  from pegasus import app
  
  parser = argparse.ArgumentParser()
  parser.add_argument('-ip', help='type in an IP address', type=str, default='127.0.0.1', nargs='?', metavar='IP ADDRESS')
  parser.add_argument('-port', help='type in a port number', type=int, choices=range(0,65535), default=5000, metavar='PORT NUMBER', nargs='?')
  parser.add_argument('--debug', dest='debug', action='store_true')
  parser.add_argument('--no-debug', dest='debug', action='store_false')
  parser.set_defaults(debug=True)
  args = parser.parse_args()
  
  app.run(host=args.ip, port=args.port, debug=args.debug)
  
subject: make app configurable from command line, resolves #14