Python Argument Parsing Inheritance

argument_parsing_inheritance.py

import argparse
import sys

class Command(object):

    def __init__(self):
        self._argument_parser = argparse.ArgumentParser()

    def main(self, args):
        self._main(self._argument_parser.parse_args(args))

class CommandCommon(Command):

    def __init__(self):
        super(CommandCommon, self).__init__()
        self._argument_parser.add_argument('-x')

class CommandAdd(CommandCommon):

    def __init__(self):
        super(CommandAdd, self).__init__()
        self._argument_parser.add_argument('-y')

    def _main(self, args_object):
        print(args_object)
        return 0


class CommandDelete(CommandCommon):

    def _main(self, args_object):
        print(args_object)
        return 0

_COMMAND_DICT = {
    'add': CommandAdd(),
    'delete': CommandDelete()
}

def main():
   return _COMMAND_DICT[sys.argv[1]].main(sys.argv[2:])

if __name__ == '__main__':
    sys.exit(main())