Yocto Relay Garage Door

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from garage import Garage

from yocto_api import *
from yocto_relay import *

#yDisableExceptions()

class YoctoRelayGarage(Garage):

    __HUB_URL = 'http://127.0.0.1:4444/'

    def __init__(self):
        super(YoctoRelayGarage, self).__init__()

        yErrorMsg = YRefParam()
        YAPI.RegisterHub(self.__HUB_URL, yErrorMsg)

        self.open_relay  = YRelay.FindRelay('garage_relays.open')
        self.close_relay = YRelay.FindRelay('garage_relays.close')

#    def __del__(self):
#        YAPI.UnregisterHub(self.__HUB_URL)

    def __trigger_relay(self, relay):
        print('Triggering relay')
        if not relay.isOnline():
            self.error_msg = 'Relay is not online'
            return False

        try:
            relay.pulse(500)
            self.error_msg = ''
            return True
        except:
            self.error_msg = str(YRefParam())
            return False

    def open(self):
        return self.__trigger_relay(self.open_relay)

    def close(self):
        return self.__trigger_relay(self.close_relay)