语法：
requests.post(url, data=None, json=None)
data：请求数据
json：json格式的数据
例：
import requests
url = "https://www.xslou.com/login.php"
headers = {
"User-Agent": "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/88.0.4324.182 Safari/537.36 Edg/88.0.705.81"}
data = {
"username": "123", "password": "123", "action": "login"}
resp = requests.post(url, headers=headers, data=data)
resp.encoding = 'gbk'
print(resp.status_code)
print(resp.text)