#!/usr/bin/env python

import argparse

if __name__ == '__main__':
    op = argparse.ArgumentParser()
    subp = op.add_subparsers(dest='action')
    start = subp.add_parser('start', help = 'Starts a floorb.')
    start.add_argument('target-name', help = 'Target name.')
    subp.add_parser('stop', help = 'Stops a floorb.')

    opts = op.parse_args(['start', 'foo'])
    assert opts.action == 'start'
    # whoops, cannot access 'target-name'
    assert opts.target_name == 'foo'