import urllib.request
import re
url = "http://pic.yxdown.com/list/0_0_1.html"
request urllib.request.Request(url)
request.add_header('User-Agent','Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36')
response = urllib.request.urlopen(request)
buf = response.read()
buf = str(buf, encoding='utf-8')
# print(buf)
# 获取所有图片url地址列表
listurl = re.findall(r'http.+\.jpg', buf)
print(listurl)
i = 1
for url in listurl:
f = open(str(i)+'.jpg', 'wb+')
req = urllib.request.urlopen(url)
buf = req.read()
# buf = str(buf)
f.write(buf)
i += 1
怎么只爬取指定数量的图片呢。

第二部分循环中加个if条件 判断i的大小 超过就break