All console-runnable samples should use better main pattern.

[theacodes]

Instead of:

def main(argv):
    args = parser.parse_args(argv[1:])

if __name__ == '__main__':
    main(sys.argv)

It should be

def descriptive_function_name(arg1, arg2, arg3):
    ...

if __name__ == '__main__':
    args = parser.parse_args()
    descriptive_function_name(args.arg1, args.arg2, args.arg3)