参与默认值argparse蟒蛇

蟒蛇argparse包括默认的信息

# Basic syntax:
parser.add_argument("-t", "--threads", default=10, 
                    help="number of threads to use [default: %(default)s]")

# this will print help messages that look like:
-t THREADS, --threads THREADS
                        number of threads to use [default: 10]