gym_http_server.py 文件源码

def get_required_param(json, param):
    if json is None:
        logger.info("Request is not a valid json")
        raise InvalidUsage("Request is not a valid json")
    value = json.get(param, None)
    if (value is None) or (value=='') or (value==[]):
        logger.info("A required request parameter '{}' had value {}".format(param, value))
        raise InvalidUsage("A required request parameter '{}' was not provided".format(param))
    return value