code: def log(self, request, spider):
          
          if self.debug:
              msg = "Filtered duplicate request: %(request)s"
              self.logger.debug(msg, {'request': request}, extra={'spider': spider})
          elif self.logdupes:
              msg = ("Filtered duplicate request %(request)s"
                     " - no more duplicates will be shown"
                     " (see DUPEFILTER_DEBUG to show all duplicates)")
              self.logger.debug(msg, {'request': request}, extra={'spider': spider})
              self.logdupes = False
docs: Logs given request.
  
          Parameters
          ----------
          request : scrapy.http.Request
          spider : scrapy.spiders.Spider