python - How do I specify two required arguments, including a subcommand, using 'argparse'? -

is there way specify 2 required arguments in argparse, 1 corresponds subcommand, , required subcommands.

the closest can manage seems with

import argparse  parser = argparse.argumentparser()  subparsers = parser.add_subparsers(help='', dest='command',  metavar='command', title='required arguments',                                    description='two arguments required') parser.add_argument('config', metavar='config', action='store', help='the config use')  cmda_parser = subparsers.add_parser('cmda',  help='a first command') cmdb_parser = subparsers.add_parser('cmdb',  help='the second operation') cmdc_parser = subparsers.add_parser('cmdc',  help='yet thing')  print(parser.parse_args()) 

which gives

usage: enigma.py [-h] command ... config  positional arguments:   config      config use  optional arguments:   -h, --help  show message , exit  required arguments:   2 arguments required    command     cmda      first command     cmdb      second operation     cmdc      yet thing 

and subcommands not show config; want is

usage: enigma.py [-h] command config  required arguments:   2 arguments required    command     cmda      first command     cmdb      second operation     cmdc      yet thing    config      config use  optional arguments:   -h, --help  show message , exit 

and each subcommand show config, eg.

usage: enigma.py cmda config [-h]       required arguments:        config      config use  optional arguments:   -h, --help  show message , exit 

is there way accomplish this?

how specific two required arguments, 1 of subcommand, second "propagated" each subcommand required argument?

parsers can "inherit" arguments parser, using parents attribute.

import argparse  parser = argparse.argumentparser()  # put common subparser arguments here. each sub parser have # own -h option, disable on shared base. subbase = argparse.argumentparser(add_help=false) subbase.add_argument('config', metavar='config', action='store', help='the config use')  subparsers = parser.add_subparsers(help='', dest='command',  metavar='command', title='required arguments',                                    description='two arguments required')  # add subbase parent list each subparser. cmda_parser = subparsers.add_parser('cmda', parents=[subbase],  help='a first command') cmdb_parser = subparsers.add_parser('cmdb', parents=[subbase], help='the second operation') cmdc_parser = subparsers.add_parser('cmdc', parents=[subbase], help='yet thing')  print(parser.parse_args())