Python argparse.ArgumentParser subclass(es)

Quick example of argparser declaration from dictionary:

import sys
from argparse.extra import DictArgumentParser

def run_testarg_processing(args, argv):
    print 'testarg argument used'

ARGUMENTS = {'--use-something':{'dest':'use_something',
                               'action':'store_true',
                               'default':False},
             'sub:testarg':{
                 #sub:testarg will create subparser 'testarg'
                 #depth of subargs is unlimited
                 'description':'Test arg subcommand',
                 'help':'Test help'
                 'func':run_testarg_processing,
                 '--use-sub-something':{'dest':'use_sub_something',
                                               'action':'store_true',
                                               'default':False},
             }}

DEFAULTS_ONLY = ['func',]
def get_argparser(argsdict=ARGUMENTS):
    #always create get_argparser function for your cli apps
    #this will enable easy integration of subsequent applications
    #with your argparser
    return DictArgumentParser(argsdict, DEFAULTS_ONLY)

def main(args=sys.argv):
    args, argv = get_argparser().parse_known_args(args[1:])
    args.func(args, argv)

if __name__ == '__main__':
    main()

Installation

Try one of these:

python setup.py install

easy_install argparse.extra

pip install argparse.extra