使用 argparse 从 --help 标志中获取帮助菜单的某个部分

Question

在我的一个--help程序中传递时，我有一个非常长的帮助菜单：optional arguments:  -h, --help            show this help message and exitmandatory arguments:  arguments that have to be passed for the program to run  -u URL, --url URL     Pass a single URL to detect the protection...request arguments:  arguments that will control your requests  --pa USER-AGENT       Provide your own personal agent to use it for the HTTP...encoding options:  arguments that control the encoding of payloads  -e PAYLOAD [TAMPER-SCRIPT-LOAD-PATH ...], --encode PAYLOAD [TAMPER-SCRIPT-LOAD-PATH ...]...output options:  arguments that control how WhatWaf handles output  -F, --format          Format the output into a dict and display it...misc arguments:  arguments that don't fit in any other category  --verbose             Run in verbose mode (more output)...构建参数的结构如下所示：        mandatory = parser.add_argument_group("mandatory arguments",                                              "arguments that have to be passed for the program to run")        mandatory.add_argument("-u", "--url", dest="runSingleWebsite", metavar="URL",                               help="Pass a single URL to detect the protection")...        req_args = parser.add_argument_group("request arguments",                                             "arguments that will control your requests")        req_args.add_argument("--pa", dest="usePersonalAgent", metavar="USER-AGENT",                              help="Provide your own personal agent to use it for the HTTP requests")...