#!/usr/bin/env python
     #
     # Copyright 2007 Doug Hellmann.
     """Explicit usage message
     """
     #end_pymotw_header
     
     import optparse
     
     parser = optparse.OptionParser(usage='%prog [options] <arg1> <arg2> [<arg3>...]',
                                    prog='my_program_name',
                                    )
     parser.add_option('-a', action="store_true", default=False)
     parser.add_option('-b', action="store", dest="b")
     parser.add_option('-c', action="store", dest="c", type="int")
     
     parser.parse_args()