miguelgrinberg.python-socketio/examples/simple-client/sync/latency_client.py

import time

import socketio


def main():
    with socketio.SimpleClient() as sio:
        sio.connect("http://localhost:5000")
        while True:
            start_timer = time.time()
            sio.emit("ping_from_client")
            while sio.receive() != ["pong_from_server"]:
                pass
            latency = time.time() - start_timer
            print(f"latency is {latency * 1000:.2f} ms")

            time.sleep(1)


if __name__ == "__main__":
    main()