Working with multiple MQTT servers

Add the following lines to the existing surfboard_monitor.py in the main virtual environment folder. The following lines declare the main block. The code file for the sample is included in the mqtt_python_gaston_hillar_06_01 folder, in the surfboard_monitor.py file:

if __name__ == "__main__": 
    surfboard = Surfboard(device_id=device_id, 
        status=SURFBOARD_STATUS_IDLE, 
        speed_mph=0,  
        altitude_feet=0,  
        water_temperature_f=0) 
    pubnub_client_id = "{}/{}/{}".format( 
        pubnub_publish_key, 
        pubnub_subscribe_key, 
        device_id) 
    pubnub_client = mqtt.Client(client_id=pubnub_client_id, 
        protocol=mqtt.MQTTv311) 
    pubnub_client.on_connect = on_connect_pubnub 
    pubnub_client.on_disconnect = on_disconnect_pubnub 
    pubnub_client.connect(host=pubnub_mqtt_server_host...