想要用requests方法呼叫post請求，首先我們要有一個post介面，我們選擇人人網登入介面來練習

1.開啟人人網的登入頁面，獲取登入的url及傳送的引數

2.獲取到登入介面url及引數後，編寫程式碼

#!usr/bin/env python
#-*- coding:utf-8 -*-
"""
@author:Administrator
@file: requests_post.py
@time: 2018/10/13
"""
import requests
import json

data = {"email":"1989898932",
        'icode':'',
        'origURL':'http://www.renren.com/home',
        'domain':'renren.com',
        'key_id':'1',
        'captcha_type':'web_login',
        'password':'123123123',
        'rkey':'6ed188b87746f002b04dcd3eb653fa63',
        'f':'https%3A%2F%2Fwww.baidu.com%2Flink%3Furl%3D30kal6ydyFtWVWEO6tqsyb4LlS-YlX4yH6U_26Wo9mW%26wd%3D%26eqid%3Dc12a001f00063a3c000000035bc1d85b'
        }
url = "http://www.renren.com/ajaxLogin/login?1=1&uniqueTimestamp=2018961914878"
r = requests.post(url=url,data=data)
#r.text返回的是字串格式
print(r.text)

#r.json列印的是字典格式
print(r.json())
print(type(r.json()))

#獲取錯誤提示資訊
dict1 = r.json()
print(dict1["failDescription"])