我如何使用多个请求并在scrapy python中在它们之间传递项目

我如何使用多个请求并在scrapy python中在它们之间传递项目

没问题。以下是您的代码的正确版本：

def page_parser(self, response):      sites = hxs.select('//div[@]')      items = []      request = Request("http://www.example.com/lin1.cpp", callback=self.parseDescription1)      request.meta['item'] = item      yield request      request = Request("http://www.example.com/lin1.cpp", callback=self.parseDescription2, meta={'item': item})      yield request      yield Request("http://www.example.com/lin1.cpp", callback=self.parseDescription3, meta={'item': item})def parseDescription1(self,response): item = response.meta['item'] item['desc1'] = "test" return itemdef parseDescription2(self,response): item = response.meta['item'] item['desc2'] = "test2" return itemdef parseDescription3(self,response): item = response.meta['item'] item['desc3'] = "test3" return item