# -*- coding: utf-8 -*-
from __future__ import absolute_import
from __future__ import division
from __future__ import print_function
from __future__ import unicode_literals
import argparse
import sys

def main():
    print (sys.version)
    parser = argparse.ArgumentParser()
    use_subparsers = True
    print("Use subparsers: %s" % use_subparsers)
    if use_subparsers:
        subparsers = parser.add_subparsers(metavar='command',
                                           dest='command',
                                           help='sub-command help')
        
        subparsers.add_parser("cmd1",
                              help="This is cmd1 no subcommands")
        parser_service = subparsers.add_parser("cmd2",
                                               help="command 2")
        parser_service.add_argument("cmd2Arg", choices=["cmd2_choice1", "cmd2_choice2"],
                                     help="cmd2 with choices cmd2_choice1 ,cmd2_choice2")
    else:
        parser.add_argument('command', choices=["cmd1_choice1", "cmd1_choice1"], help="command 1")
        parser.add_argument('param1', nargs="?")
    result = parser.parse_args()
    print(result)  
        
if __name__ == '__main__':
    main()