1.拿到主页面源代码，提取到子页面的地址 href

2.拿子页面的内容，从中找到图片下载地址

3.下载图片

import requests
from bs4 import BeautifulSoup
import time

domain = "https://www.umei.cc"
url = "https://www.umei.cc/bizhitupian/weimeibizhi/"
rese = requests.get(url)
rese.encoding = "utf-8" # 处理乱码


# 把源代码交给bs
page = BeautifulSoup(rese.text, "html.parser")  # 指定html解析器

son1 = page.find("div", class_="listlbc_cont_l").find_all("a", class_="img_album_btn")
for i in son1:
    son2 = domain + i.get("href")    #直接通过get拿到属性值，进行拼接

    # 拿子页面源代码
    son_rese = requests.get(son2)
    son_rese.encoding = "utf-8"

    # 从子页面拿下载路径
    son_page = BeautifulSoup(son_rese.text, "html.parser")
    down1 = son_page.find("div", class_="big-pic").find("img")
    down2 = down1.get("src")

    #   下载图片
    down2_rese = requests.get(down2)
    # down2_rese.content  # 拿到图片字节

    img_name = down2.split("/")[-1] # 拿到url最后一/的内容
    with open("img/"+img_name, mode="wb") as f:
        f.write(down2_rese.content)  #图片内容写入文件

    print("over", img_name)
    time.sleep(1)


print("all is done")