parser.add_argument("--list", nargs="+", default=["a", "b"]) SHELL $ python3 example.py --list a b c # List would look like ['a','b','c']
parser.add_argument('-l','--list', nargs='+', help='<Required> Set flag', required=True) # Use like: # python arg.py -l 1234 2345 3456 4567
