from __future__ import print_function

import sys
import os

from ruamel.std.argparse import ProgramBase, option, sub_parser, version, \
     SmartFormatter

class TestCmd(ProgramBase):
    def __init__(self):
        super(TestCmd, self).__init__(
            formatter_class=SmartFormatter
        )

    # you can put these on __init__, but subclassing TestCmd
    # will cause that to break
    @option('--quiet', '-q', help='suppress verbosity', action='store_true',
            global_option=True)
    @version('version: 1.2.3')
    def _pb_init(self):
        # special name for which attribs are included in help
        pass

    def run(self):
        if self._args.func:
             return self._args.func()

    def parse_args(self, *args):
        self._parse_args(*args)

    @sub_parser(help='specific help for readit')
    @option('--name', default='abc')
    def readit(self):
        print('calling readit')

    @sub_parser('writeit', help='help for writeit')
    @option('--target')
    def other_name(self):
        print('calling writeit')


n = TestCmd()
n.parse_args(['--help'])
n.run()