#!/usr/bin/env python
     #
     # Copyright 2007 Doug Hellmann.
     """Using optparse with single-letter options.
     """
     #end_pymotw_header
     
     import optparse
     
     parser = optparse.OptionParser()
     
     parser.add_option('-q', action='store_const', const='query', dest='mode',
                       help='Query')
     parser.add_option('-i', action='store_const', const='install', dest='mode',
                       help='Install')
     
     query_opts = optparse.OptionGroup(
         parser, 'Query Options',
         'These options control the query mode.',
         )
     query_opts.add_option('-l', action='store_const', const='list', dest='query_mode',
                           help='List contents')
     query_opts.add_option('-f', action='store_const', const='file', dest='query_mode',
                           help='Show owner of file')
     query_opts.add_option('-a', action='store_const', const='all', dest='query_mode',
                           help='Show all packages')
     parser.add_option_group(query_opts)
     
     install_opts = optparse.OptionGroup(
         parser, 'Installation Options',
         'These options control installation.',
         )
     install_opts.add_option('--hash', action='store_true', default=False,
                             help='Show hash marks as progress indication')
     install_opts.add_option('--force', dest='install_force', action='store_true', default=False,
                             help='Install, regardless of depdencies or existing version')
     parser.add_option_group(install_opts)
     
     print parser.parse_args()