Python发布请求418错误

I'm trying to use Python post request to automate the refreshing of a summoner profile in OP.GG:

On the page there is a button that calls the following javascript file: https://opgg-static.akamaized.net/js3/summoner.js?1492755586

Navigating to this URL: https://na.op.gg/summoner/userName=hamski

Running the follow snippet of code in Chrome's console works perfectly. The profile refreshed as expected.

$.OP.GG.ajax.getJSON({
    url: ('/summoner/ajax/renew.json/'),
    method: 'post',
    data: {
        summonerId: 47220368
    },
    callback: {
        onJSON: function(json){
            console.log(json)
        },
        onError: function(error){
            $.OP.GG.summoner.renewBtn.stop(btn);
            alert(error);
        }
    }
});

I did a post request using the requests module

import json
import requests

url = "https://na.op.gg/summoner/ajax/renew.json/"

payload = {
    'summonerId': 47220368,
}

data=json.dumps(payload)

print data

r = requests.post(url, data)

print r
print r.status_code
print r.text

The result was a 418 error.

<Response [418]> 418

r.text basically gives me the html of this page: https://na.op.gg/summoner/ajax/renew.json/

Updated code:

import json
import requests
from fake_useragent import UserAgent

ua = UserAgent(cache=False)


url = "https://na.op.gg/summoner/ajax/renew.json/"

payload = {
    'summonerId': 47220368,
}

headers = requests.utils.default_headers()
headers.update(
{
    'User-Agent':ua.random
})

print ua.random

session = requests.Session()
r1 = session.get("https://na.op.gg/summoner/userName=hamski",headers=headers )
print session.cookies.get_dict()

r = requests.post(url, data=json.dumps(payload),cookies=r1.cookies, headers=headers)

print r
print r.status_code
print r.text

I was able to figure out what was missing in my request using a request interceptor - chrome extension called "postman"

Turns out that the cookies and headers did not matter at all.

Replacing data=json.dumps(payload) with data=payload fixed the issue.