code: def _check_params(self, *args, **kwargs):
          
          terms = kwargs.get('terms')
          if not terms:
              raise crawler.CrawlerParamsError('Terms needed!')
  
          if not isinstance(terms, list):
              terms = [terms]
          if len(terms) != len(self.base['terms']):
              # raise crawler.CrawlerParamsError('args length must match base[terms]')
              log.debug('args length {} != {} must match base[terms]'.format(len(terms), len(self.base['terms'])))
docs: 检查参数信息是否匹配