# -*- coding=utf-8 -*-
import requests
from lxml import etree

headers = {
    'User-Agent': 'Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.86 Safari/537.36',
}

url = 'https://passport.csdn.net/account/login'
z = requests.get(url,headers=headers)
sel = etree.HTML(z.content)


csrf_token = sel.xpath('//input[@name="lt"]/@value'
 
)[0]
execution = sel.xpath('//input[@name="execution"]/@value')[0]
formdata = {

            'username':'賬號',
'password':'密碼',
'rememberMe' : 'true',
'lt':csrf_token,
'execution':execution,
'_eventId':'submit',
}

s = requests.post(url=url,data=formdata,headers=headers)

print s.cookies #獲取伺服器返回的cookie  但是獲取的是一個cookie物件 。可以用下面轉化為字典
 
cookies = requests.utils.dict_from_cookiejar(s.cookies)

r3 = requests.get("http://my.csdn.net", headers=headers, cookies=cookies)

print r3.text