code: def _init_dbus(self):
          
          _bus = SessionBus()
  
          if self.device_id is None:
              self.device_id = self._get_device_id(_bus)
              if self.device_id is None:
                  return False
  
          try:
              self._dev = _bus.get(SERVICE_BUS, DEVICE_PATH + "/%s" % self.device_id)
          except Exception:
              return False
  
          return True
docs: Get the device id