You can work with argparse (with multiple args) by using the following piece of code:-
parser = argparse.ArgumentParser(description='Description of your program')
parser.add_argument('-f','--foo', help='Description for foo argument', required=True)
parser.add_argument('-b','--bar', help='Description for bar argument', required=True)
args = vars(parser.parse_args())
The variable args will be a dictionary containing the arguments:
if args['foo'] == 'Hello':
...
if args['bar'] == 'World':
...
In your case, you should simply add only one argument.