TypeError: not enough arguments for format string

Error msg:

--- Logging error ---
Traceback (most recent call last):
  File "/usr/lib/python3.6/logging/__init__.py", line 993, in emit
    msg = self.format(record)
  File "/usr/lib/python3.6/logging/__init__.py", line 839, in format
    return fmt.format(record)
  File "/usr/lib/python3.6/logging/__init__.py", line 579, in format
    s = self.formatMessage(record)
  File "/usr/lib/python3.6/logging/__init__.py", line 548, in formatMessage
    return self._style.format(record)
  File "/usr/lib/python3.6/logging/__init__.py", line 391, in format
    return self._fmt % record.__dict__
TypeError: not enough arguments for format string
Call stack:
  File "start.py", line 7, in <module>
    Engine().start()
  File "/home/hpcm/Desktop/spider/13-frame_spider/myscrapy/core/engine.py", line 45, in start
    logger.info("End time is [ {} ]".format(end))
Message: 'End time is [ 2018-09-27 17:55:54.795786 ]'
Arguments: ()

问题:

　　setting中的log使用的DEFAULT_LOG_FMT参数出错

解决:

　　检查参数是否写错, 或者多项少项