import gobject from model.devices import device class Device(device.Device): __gproperties__ = { 'level' : (int, None, None, 0, 100, 0, gobject.PARAM_READABLE) } def __init__(self): device.Device.__init__(self) self._level = 0 def do_get_property(self, pspec): if pspec.name == 'level': return self._level def get_type(self): return 'battery'