python request向回调传递参数【转】

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http://www.manongjc.com/detail/50-mqbkcaqdoaqsnrp.html

1. def parse(self, response):
   
2.     for sel in response.xpath('//li[@class="clearfix"]/div[@class="list_con"]'):
   
3.         item=DmozItem()
   
4.         item['href']=sel.xpath('h2/a/@href').extract()[0]
   
5. 
   
6.         request= scrapy.Request(item['href'], callback=others_parse,dont_filter=True)
   
7.         request.meta['item'] = item
   
8.         yield request
   
9. 
   
10. 
    
11. def others_parse(self, response):
    
12.     item = response.meta['item']
    
13.     item['other_url'] = response.url
    
14.     yield item

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