Function _get_action_name

Lib/argparse.py:837–857

(argument)

# =====================

def _get_action_name(argument):
    if argument is None:
        return None
    elif argument.option_strings:
        return '/'.join(argument.option_strings)
    elif argument.metavar not in (None, SUPPRESS):
        metavar = argument.metavar
        if not isinstance(metavar, tuple):
            return metavar
        if argument.nargs == ZERO_OR_MORE and len(metavar) == 2:
            return '%s[, %s]' % metavar
        elif argument.nargs == ONE_OR_MORE:
            return '%s[, %s]' % metavar
        else:
            return ', '.join(metavar)
    elif argument.dest not in (None, SUPPRESS):
        return argument.dest
    elif argument.choices:
        return '{%s}' % ','.join(map(str, argument.choices))
    else:
        return None


class ArgumentError(Exception):