session = requests.session()
session.get(url,headers)

# coding=utf-8
import requests
session = requests.session()
# 登录的表单url
post_url = "http://www.renren.com/PLogin.do"
post_data = {"email": "your_email", "password": "your_password"}
headers = {
  "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36"
}
# 使用session发送post请求，cookie保存在其中
session.post(post_url, data=post_data, headers=headers)
# 在使用session进行请求登陆之后才能访问的地址
# 这是个人首页url
r = session.get("http://www.renren.com/327550088/profile", headers=headers)
# 保存页面到本地
with open("renren1.html", "w", encoding="utf-8") as f:
  f.write(r.content.decode('utf-8'))

# coding=utf-8
import requests
headers = {
  "User-Agent": "Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13_2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/63.0.3239.84 Safari/537.36",
  "Cookie":"你的登录cookie"
}
r = requests.get("http://www.renren.com/327550088/profile",headers=headers)
#保存页面
with open("renren2.html","w",encoding="utf-8") as f:
  f.write(r.content.decode())

# 字典生成器的用法
cookies = {i.split("=")[0]:i.split("=")[1] for i in cookies.split("; ")}
print(cookies)
r = requests.get("http://www.renren.com/327550088/profile",headers=headers,cookies=cookies)