Message 169695 - Python tracker
After recent change (78307 '#13922: argparse no longer incorrectly strips '--' after the first one.'), parse_args stopped working with a tuple argument. It is easy to pass tuple to argparse by using positional function arguments: def f(*args): parser.parse_args(args) This will fail, because args is a tuple. It is necessary to have at least one positional argument to trigger the bug.