简单爬取雪球的7*24热点消息，遇到时间码不会转换

import requests
import json
import time

headers = {
            'user-agent':'Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/90.0.4430.93 Safari/537.36',
            'Cookie':'不公开自己的'
}

url = 'https://xueqiu.com/statuses/livenews/list.json?since_id=-1&max_id=-1&count=10'
html = requests.get(url=url, headers=headers).text
html.encode('utf-8')
data = json.loads(html)
news = data['items']
#时间戳编写

for n in news:
    shijian = n['created_at']
    text = n['text']
    url = n['target']
    print('\n')
    print(shijian,'\n',text,'\n',url)
    r = time.sleep(2)
    print(r)

是created_at创建时间，百度过了但是本人比较生疏，不太懂写法

shijian = n['created_at']
替换成
shijian = time.strftime("%Y-%m-%d %H:%M:%S", time.localtime(int(n['created_at'])/1000))