parse_dhcp_snooping.py 文件源码

def show_subparser_help(subparser_name):
    '''
    Function returns help message for subparser
    '''
    subparsers_actions = [
        action for action in parser._actions
        if isinstance(action, argparse._SubParsersAction)]
    return subparsers_actions[0].choices[subparser_name].format_help()