config.py 文件源码

def report_unused_values(self, logger, optional_configs=None):
        optional_configs = [] if optional_configs is None else optional_configs
        has_error = False
        for config in self.iter_configs():
            messages = config.describe_unused_values()
            if len(messages) > 0:
                if config in optional_configs:
                    log_level = logging.WARNING
                else:
                    log_level = logging.ERROR
                    has_error = True
                for message in messages:
                    logger.log(log_level, message)

        if has_error:
            raise AssertionException('Detected unused keys that are not ignorable.')