Scrapy中附加页的下一页

为什么我不能转到parse\u next中的下一页并合并某个date do对象?

def parse(self, response):
    item = TItem()
    ...
    link_www = lekarz.xpath('whatever/@href').extract_first()
    request = scrapy.Request(link_www, callback=self.parse_next)
    request.meta['item'] = item
    yield request

    next_page = response.css('whenever::attr(href)').extract_first()
    if next_page is not None:
        yield response.follow(next_page, callback=self.parse)

attri = []

def parse_next(self, response):
    item = response.meta['item']
    self.attri.append(xpath("whatever")).extract_first

    next_pager = response.css('whatever_too_xd').extract_first()
    if next_pager is not None:
        yield response.follow(next_pager, callback=self.parse_next)
    else:
        item['hehe'] = self.attri
        yield item

输出:

KeyError:“项目”

为什么?