#!/usr/bin/env python
     # encoding: utf-8
     #
     # Copyright (c) 2010 Doug Hellmann.  All rights reserved.
     #
     """Choice enumerations for option values.
     """
     #end_pymotw_header
     
     import optparse
     
     parser = optparse.OptionParser()
     
     parser.add_option('-c', type='choice', choices=['a', 'b', 'c'])
     
     options, args = parser.parse_args()
     
     print 'Choice:', options.c