bs4获取图片

import requests
from bs4 import BeautifulSoup
import time

url = '*******************'
reqs = requests.get(url)
reqs.encoding = 'utf-8'

main_page = BeautifulSoup(reqs.text,'html.parser')
all_list = main_page.find_all('div',class_='index-list-imgc h400')[3].find_all('a')

for i in all_list:
    it = i.get('href')
    url1 = url+it
    res_img = requests.get(url=url1)
    res_img.encoding = 'utf-8'
    tu = BeautifulSoup(res_img.text,'html.parser')
    div1 = tu.find('div',class_="big-pic")
    img = div1.find('img')
    src = img.get('src')

    res = requests.get(url=src)
    img_name = src.split('/')[-1]

    with open('img/'+img_name,mode='wb') as f:
        f.write(res.content)
    print('over~',img_name)
    time.sleep(1)
    f.close()
print('all over~')