Basic socketio server and client

socket_client.py

import socketio
sio = socketio.Client(reconnection=True)
@sio.event
def connect():
    print("Connected to the server")
    sio.send("Hello world!")
@sio.event
def message(data):
    print(f"Received message: {data}")
@sio.event
def disconnect():
    print("Disconnected from server")
sio.connect("http://localhost:5000")
sio.wait()

socket_server.py

from flask import Flask
from flask_socketio import SocketIO, send

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

@socketio.on('message')
def handle_message(msg):
    print('Message received: ' + msg)
    send(msg)

socketio.run(app, debug=True)