Python3 接口测试，测试需要带登录态的接口 A，requests.cookies 获取到的登录态 cookie 以什么样的语句/格式/语法传到接口 A ?

已经尝试过 requests.Session（）、cookiejar 的方法，还是不能成功。http://blog.csdn.net/falseen/article/details/46962011

#方法一：requests.Session
coding = utf-8
import requests,json,urllib

login_url = http://'xxx'
payload = {'postData':'{"userName":"xxx","password":"xxx",\
        "validateCode":"","validateSession":"","appId":"","jump":""}'}
s = requests.Session()
req=s.post(login_url,data=payload)

#需要登录态的接口
newurl = 'http://xxx'
req_new = s.post(newurl)
req_new_value = req_new.json()
print(req_new_value)
code = req_new.json()['code']
print(code)

#方法二：手动带上cookies/headers
coding = utf-8
import requests,json,urllib

login_url = http://'xxx'
payload = {'postData':'{"userName":"xxx","password":"xxx",\
        "validateCode":"","validateSession":"","appId":"","jump":""}'}
req=requests.post(login_url,data=payload)
headers = req.headers
#把requests.cookies获取到的cookies转化成字典格式
cookies = requests.utils.dict_from_cookiejar(login_cookies)

#需要登录态的接口
newurl = 'http://xxx'
req_new = requests.post(newurl,cookies=cookies)

#headers和cookies都试过，依然提示登录态失效
#req_new = requests.post(newurl,headers=headers,cookies=cookies)

code = req_new.json()['code']
print(code)