python用requests.session()两次下载的验证码会不一样
python新手,网上查了不是说session能保证请求一样嘛,不懂为什么两次下载的验证码会不一样....
代码如下
import requests
url='http://cmp.enjoyboys.com:8118/adscmp/jsp/common/image.jsp'
s=requests.session()
ir = s.get(url, stream=True)
if ir.status_code == 200:
with open('logo.jpg', 'wb') as f:
for chunk in ir:
f.write(chunk)
rr = s.get(url, stream=True)
if rr.status_code == 200:
with open('logo1.jpg', 'wb') as f:
for chunk in rr:
f.write(chunk)