python - I want to use scrapy just download .jpg picture -


i have question want down load .jpg image. used follow code found still download .png or .gif picture. can me ?

#coding:utf-8 scrapy.spiders import spider scrapy.selector import selector jianshu.items import jianshuitem import scrapy scrapy.crawler  import  crawlerprocess   class jiansider(spider):     name = "jiantu"     allowed_domains = []     start_urls= [     "https://tieba.baidu.com/p/5227563995"     ]       def parse(self, response):          sel = selector(response)         sites = sel.xpath('//div/img/@src').extract()         item = jianshuitem()         item['image_url'] = response.xpath('//div/img/@src').extract()         url in item['image_url']:                list_photo = url.split('.')             photo_type = list_photo[len(list_photo)-1]             print photo_type             if photo_type != 'jpg':                 #print url                 item['image_url'].remove(url)                 #print "delete1"           yield item         total_page = response.xpath('//span[@class="red"]/text()').extract()         now_page = response.xpath('//li/span[@class="tp"]/text()').extract()         tpa=total_page[len(total_page)-1]         npa=now_page[len(now_page)-1]         tpage= int(tpa)         npage= int (npa)          print "present page -----"         print npage         print "total page ------"         print tpage         starturls = 'https://tieba.baidu.com/p/5227563995?pn='         if npage != tpage:             npage = npage+1             new_url = '%s%s'%(starturls,npage)             print "new_url ------------"             print new_url                if new_url:             yield  scrapy.request(new_url,callback = self.parse)

i use if page!= .jpg avoid download photo type isn't jpg failed. can tell me why , me deal ?


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