parser.add_option ("--minmax", action="store_true", dest="minmax", help="display minimum and maximum python versions described by the file", default=False)
parser.add_option ("-l", "--long", action="store_true", dest="long", help='prepend versions with "python"',default=False)
parser.add_option ("--pycentral", action="store_true", dest="pycentral", help="Parse a pycentral-type version string instead",default=False)
parser.add_option ("--raw", action="store_true", dest="raw", help="Output the raw input string (useful with --pycentral)",default=False)
parser.add_option ("--all", action="store_true", dest="all", help="List all supported versions instead of parsing a file",default=False)