def parse_args(checker_keys):
    """Function for parsing command line arguments"""

    string = "\nCHECKER option: \n\t\t"
    choose = "\n\t\t".join(str(el) for el in checker_keys)
    string += choose

    args_parser = optparse.OptionParser(usage=string)
    args_parser.add_option("-c", dest="checker", help="Checker to execute", choices=checker_keys)
    args_parser.add_option("-s", dest="src", help="Path to the mlx5 source tree", default=SIMX_SRC_DIR)
    args_parser.add_option("-v", action="store_true", dest="verbose", default=False, help="Verbose logging")

    options, args = args_parser.parse_args()

    if options.checker == None:
        args_parser.error("Error, checker is mandatory\n")

    return (options, args)








#### and part of the main
    (options, args) = parse_args(checkers.keys())

    if len(args):
        file_list = args
    else:
        file_list = glob.glob(options.src + os.sep + "*.[hc]")
        SIMX_SRC_DIR = options.src

    if options.checker in checkers:
        rc = checker_dispatch(file_list, options)
    else:
        sys.stderr.write("Error, unsupported checker '%s'\n" % options.checker)
        rc = 1