ui.py 文件源码

def parse_args(parser):
    """http://codereview.stackexchange.com/questions/79008/parse-a-config-file-
    and-add-to-command-line-arguments-using-argparse-in-python """
    args = parser.parse_args()
    if args.config_file:
        if not YAML_AVAILABLE:
            logging.fatal("Install PyYAML in order to use config files.")
            return args
        data = yaml.load(args.config_file)
        delattr(args, 'config_file')
        arg_dict = args.__dict__
        for key, value in data.items():
            if isinstance(value, list):
                for v in value:
                    arg_dict[key].append(v)
            else:
                arg_dict[key] = value
    return args