ui.py 文件源码

def parse_param_string(param):
    """Parses a parameter string such as 'param1=x,param2=y'. Loads 
    config files if specified in the string. If ``param`` points to a
    file, load this file with YAML.
    """
    if not param:
        return {}
    if os.path.isfile(param):
        param = "config_file=%s" % param
    config = {}
    for pair in param.strip().split(","):
        (k,v) = pair.split("=", 1)
        if k == 'config_file':
            if not YAML_AVAILABLE:
                logging.fatal("Install PyYAML in order to use config files.")
            else:
                with open(v) as f:
                    data = yaml.load(f)
                    for config_file_key, config_file_value in data.items():
                        config[config_file_key] = config_file_value
        else:
            config[k] = v
    return config