第一个出现错误

#-*- coding: utf-8 -*-

importrequests

url= 'https://passport.jd.com/uc/loginService'headers= {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36'}

data={'loginname': 'XXXXXXX','nloginpwd': 'XXXXXXXX'}

r=requests.post(url, data)printr.text

url1= 'https://order.jd.com/center/list.action'r1=requests.get(url1)print r1.text

第二个正常

importrequests

url= 'https://passport.jd.com/uc/loginService'headers= {'User-Agent':'Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/70.0.3538.77 Safari/537.36'}

data={'loginname': 'XXXXXXX','nloginpwd': 'XXXXXXXX'}

session=requests.Session()

r=session.post(url, data)printr.text

url1= 'https://order.jd.com/center/list.action'r1=session.get(url1)print r1.text

非常清晰体现出了session的用途.

requests库的session对象能够帮我们跨请求保持某些参数，也会在同一个session实例发出的所有请求之间保持cookies

printr.cookies.values()printr1.cookies.values()printr.cookies.keys()printr1.cookies.keys()printr.cookies.get_dict()print r1.cookies.get_dict()

示例

s = requests.session()

# req_param = '{"belongId": "300001312","userName": "alitestss003","password":"pxkj88","captcha":"pxpx","captchaKey":"59675w1v8kdbpxv"}'

# res = s.post('http://test.e.fanxiaojian.cn/metis-in-web/auth/login', json=json.loads(req_param))

# # res1 = s.get("http://test.e.fanxiaojian.cn/eos--web/analysis/briefing")

# print(res.cookies.values()) 获取登陆的所有session

参考文献：

http://docs.python-requests.org/zh_CN/latest/user/quickstart.html

https://www.jb51.net/article/141305.htm

https://www.cnblogs.com/lingxia/p/9074620.html