了解图片懒加载这种反爬机制

什么是图片懒加载？

• 案例分析：抓取站长素材http://sc.chinaz.com/中的图片数据

#!/usr/bin/env python
# -*- coding:utf-8 -*-
import requests
from lxml import etree

if __name__ == "__main__":
     url = 'http://sc.chinaz.com/tupian/gudianmeinvtupian.html'
     headers = {
         'User-Agent': 'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_12_0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/69.0.3497.100 Safari/537.36',
     }
     #获取页面文本数据
     response = requests.get(url=url,headers=headers)
     response.encoding = 'utf-8'
     page_text = response.text
     #解析页面数据（获取页面中的图片链接）
     #创建etree对象
     tree = etree.HTML(page_text)
     div_list = tree.xpath('//div[@>)
     #解析获取图片地址和图片的名称
     for div in div_list:
         image_url = div.xpath('.//img/@src')
         image_name = div.xpath('.//img/@alt')
         print(image_url) #打印图片链接
         print(image_name)#打印图片名称

爬虫文件