import paho.mqtt.client as mqtt from tests.paho_test import get_test_server_port, loop_until_keyboard_interrupt mqttc = mqtt.Client(mqtt.CallbackAPIVersion.VERSION1, "01-will-set") mqttc.will_set("topic/on/unexpected/disconnect", "will message", 1, True) mqttc.connect("localhost", get_test_server_port()) loop_until_keyboard_interrupt(mqttc)