python argparse list of lists of str choices code example

Example 1: argparse accept only few options

...
parser.add_argument('--val',
                    choices=['a', 'b', 'c'],
                    help='Special testing value')

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

Example 2: parser.add_argument array python

parser.add_argument('-l','--list', nargs='+', help=' Set flag', required=True)
# Use like:
# python arg.py -l 1234 2345 3456 4567