python自动下载网站图片

from urllib import request
from lxml import etree
import time

for pagenum in range(330,400):
    #伪造头信息
    headers = { "User-Agent":"Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.85 Safari/537.36" }
    #网址
    url = r"https://www.baidu.com"+str(pagenum)+'.html'
    #获取网页源代码
    response = request.Request(url=url,headers=headers) 
    res = request.urlopen(response)
    html = res.read().decode('utf-8')
    #根据xpath获取图片地址
    name_list = etree.HTML(html).xpath("/html/body/div[2]/div[1]/div[3]/div/p/img/@src")[0]
    response2 = request.Request(url=name_list,headers=headers)
    res = request.urlopen(response2).read()
    #将图片写入硬盘
    with open(str(pagenum)+'.webp','wb') as f:
        f.write(res)
    #等待1s，避免网站会因为访问过快导致访问失败。
    time.sleep(1)

推荐python3运行该脚本，自动访问网页分页，分析地址中包含的图片地址，并保存到硬盘。