code: def main():
    
    parser = argparse.ArgumentParser(description='A distributed test framework')
    parser.add_argument('testfile',
        help='The file that is used to determine the test suite run')
    parser.add_argument('--test-only',
        nargs='*',
        dest='test_list',
        help='run only the named tests to help debug broken tests')
    parser.add_argument('--machine-list',
        nargs='*',
        dest='machine_list',
        help='''mapping of logical host names to physical names allowing the same
                test suite to run on different hardware, each argument is a pair
                of logical name and physical name separated by a =''')
    parser.add_argument('--config-overrides',
        nargs='*',
        dest='config_overrides',
        help='''config overrides at execution time, each argument is a config with
                its value separated by a =. This has the highest priority of all
                configs''')
    parser.add_argument('-d', '--output-dir',
        dest='output_dir',
        help='''Directory to write output files and logs. Defaults to the current
                directory.''')
    parser.add_argument("--log-level", dest="log_level", help="Log level (default INFO)", default="INFO")
    parser.add_argument("--console-log-level", dest="console_level", help="Console Log level (default ERROR)",
                        default="ERROR")
    parser.add_argument("--nopassword", action='store_true', dest="nopassword", help="Disable password prompt")
    parser.add_argument("--user", dest="user", help="user to run the test as (defaults to current user)")
    args = parser.parse_args()
    try:
      call_main(args)
    except ValueError:
      #We only sys.exit here, as call_main is used as part of a unit test
      #and should not exit the system
      sys.exit(1)
docs: Parse command line arguments and then run the test suite