python爬取内容为空怎么剔除_python - 用scrapy爬取网站内容时，如何忽略某些内容为空的值；...

我爬取京东上所有手机信息时会碰到如下问题：

1、返回值过多，如下图片所示：

2、spider代码如下：

-- coding: utf-8 --

import scrapy

from scrapy.http import Request

from ueinfo.items import UeinfoItem

class MrueSpider(scrapy.Spider):

name = 'mrue'

allowed_domains = ['jd.com']

start_urls = ['http://jd.com/']

def parse(self, response):

key="手机"

for i in range(1,2):

url="https://search.jd.com/Search?keyword="+str(key)+"&enc=utf-8&page="+str((i*2)-1)

#print(url)

yield Request(url=url,callback=self.page)

def page(self,response):

#body=response.body.decode("utf-8","ignore")

allid=response.xpath("//p[@class='p-focus']//a/@data-sku").extract()

for j in range(0,len(allid)):

thisid=al