xpath學習爬取圖片

大家好，我是天空之城。今天教大家用xpath爬取圖片。

import requests,re,lxml
from lxml import etree

class Spider(object):
    def __init__(self):
        self.headers = {
            'Referer': 'https://www.mzitu.com',
            'User-Agent': 'Mozilla/5.0 (Windows NT 10.0; rv:46.0) Gecko/20100101 Firefox/46.0',
            'cookie': 'Hm_lvt_cb7f29be3c304cd3bb0c65a4faa96c30=1589688375; Hm_lpvt_cb7f29be3c304cd3bb0c65a4faa96c30=1589693220'
        }


    def getpage(self):
        for i in range(100):
            url = 'https://www.mzitu.com/page/{}/'.format(str(i))
            res=requests.get(url,headers=self.headers)
            print(res.status_code)
            res1=res.text
            html = etree.HTML(res1)
            self.getdata(html)

    def getdata(self,html):

        titles=html.xpath('//ul[@id="pins"]/li/a/img/@alt')
        links=html.xpath('//ul[@id="pins"]/li/a/img/@data-original')
        for title,link in zip(titles,links):
            pic_name = title + '.jpg'
            res_pic = requests.get(url=link, headers=self.headers)
            try:
                with open(pic_name, 'wb') as f:
                    f.write(res_pic.content)
            except Exception:
                pass
              
spider=Spider()
spider.getpage()