python - how can i change registry_name of argparse's help argument -

python3 argparse use -h , --help argument. want use -h , --host hostname parameter. how can stop argparse use -h help?

i know can use add_help=false when creating instance of argumentparse. gets deal print_help self. this:

import os import argparse inc import epilog   def parsecommandline():     parser = argparse.argumentparser(         description = "network client program",         epilog = epilog,         add_help = false,         )     parser.add_argument(         "--help",         dest="help",         action="store_true",         help="show message , exit",     )     parser.add_argument(         "-h", "--host",         dest="host",         action="store",         help="target host",         )     parser.add_argument(         "-p", "--port",         dest="port",         action="store",         type=int,         help="target port",         )      return parser, parser.parse_args()  def main():     parser, opt = parsecommandline()     if opt.help:         parser.print_help()         os.sys.exit(0) 

it works. want add required=true both host , port arguments. it's borken. because when python xxxx.py --help, argparse see missing required argment host , port, complain you, , not show screen.

anyone kown how change default registry_name argparse's argument?

use conflict_handler='resolve' override register_name.

import os import argparse inc import epilog  def parsecommandline():     parser = argparse.argumentparser(         description = "network client",         epilog = epilog,         conflict_handler='resolve'         )     parser.add_argument(         "-w", "--crlf",         dest="crlf",         action="store_true",         help="use crlf @ end of line"         )     parser.add_argument(         "-l", "--line",         dest="line",         action="store_true",         help="send line line",         )     parser.add_argument(         "-h", "--host",         dest="host",         action="store",         required=true,         help="target host",         )     parser.add_argument(         "-p", "--port",         dest="port",         action="store",         type=int,         required=true,         help="target port",         )     return parser, parser.parse_args()  def main():     parser, opt = parsecommandline()   if __name__ == '__main__':     main() 

let's see how works

d:\pytools>python nc.py usage: nc.py [--help] [-w] [-l] -h host -p port nc.py: error: following arguments required: -h/--host, -p/--port 

yes works want

d:\pytools>python nc.py --help usage: nc.py [--help] [-w] [-l] -h host -p port  network client  optional arguments:   --help                show message , exit   -w, --crlf            use crlf @ end of line   -l, --line            send line line   -h host, --host host  target host   -p port, --port port  target port  report nc.py bugs http://www.truease.com/forum-66-1.html 

yes, want.