def device_main()

in aws-iot-greengrass-for-beginners/alert/main.py [0:0]

• 12 lines of code
• 3 McCabe index (conditional complexity)

def device_main():
    """
    main loop for Alert device
    """
    global device_name, mqtt_connection

    arg_check()

    mqtt_connection = discover_gg_host()
    topic = "alert/#"
    subscribe_future, _ = mqtt_connection.subscribe(
        topic, QoS.AT_MOST_ONCE, on_message_received)
    subscribe_result = subscribe_future.result()
    print("Subscribed to {} with {}".format(
        topic, str(subscribe_result['qos'])))

    while True:
        # eait for events
        time.sleep(1)