用于服务端和客户端通信，服务端主动给客户端发送消息

前提：

确保安装了socket库：

pip install flask-socketio python-socketio

服务端代码

from flask import Flask
from flask_socketio import SocketIO
import threading
import time

app = Flask(__name__)
socketio = SocketIO(app)

# 全局变量
t = 0
list230 = []


def read230():
    global t
    global list230
    while True:
        try:
            list230 = [1, 1, 1, 0, 0]
            socketio.emit("update_data", {"data": list230})
        except Exception as exc:
            list230 = [0, 0, 0, 100, 100]
            time.sleep(1)
        time.sleep(0.1)


if __name__ == "__main__":
    t1 = threading.Thread(target=read230, name="read230")
    t1.start()
    socketio.run(app, host="0.0.0.0", port=5000)

客户端是另一个程序，你可以使用 SocketIO 客户端库来接收数据

import socketio

# 创建一个 SocketIO 客户端
sio = socketio.Client()

@sio.event
def connect():
    print("连接成功")

@sio.event
def update_data(msg):
    print("接收到数据:", msg['data'])

@sio.event
def disconnect():
    print("断开连接")

if __name__ == '__main__':
    # 连接到服务器
    sio.connect('http://127.0.0.1:5000')
    try:
        # 保持程序运行
        while True:
            pass
    except KeyboardInterrupt:
        sio.disconnect()

结果