#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Show the built-in argument actions.
     """
     #end_pymotw_header
     
     import argparse
     
     parser = argparse.ArgumentParser()
     
     parser.add_argument('-s', action='store', dest='simple_value',
                         help='Store a simple value')
     
     parser.add_argument('-c', action='store_const', dest='constant_value',
                         const='value-to-store',
                         help='Store a constant value')
     
     parser.add_argument('-t', action='store_true', default=False,
                         dest='boolean_switch',
                         help='Set a switch to true')
     parser.add_argument('-f', action='store_false', default=False,
                         dest='boolean_switch',
                         help='Set a switch to false')
     
     parser.add_argument('-a', action='append', dest='collection',
                         default=[],
                         help='Add repeated values to a list',
                         )
     
     parser.add_argument('-A', action='append_const', dest='const_collection',
                         const='value-1-to-append',
                         default=[],
                         help='Add different values to list')
     parser.add_argument('-B', action='append_const', dest='const_collection',
                         const='value-2-to-append',
                         help='Add different values to list')
     
     parser.add_argument('--version', action='version', version='%(prog)s 1.0')
     
     results = parser.parse_args()
     print 'simple_value     =', results.simple_value
     print 'constant_value   =', results.constant_value
     print 'boolean_switch   =', results.boolean_switch
     print 'collection       =', results.collection
     print 'const_collection =', results.const_collection