def __init__(self): Base.__init__(self, self.__class__)
def __init__(self, bus=None, force=False): Base.__init__(self, self.__class__)
def __init__(self, channel=0, frequency=0): Base.__init__(self, self.__class__)
def __init__(self): Base.__init__(self, self.__class__) self._inputs = [None] * 40 # We have 40 input pins