class SubClient:

    def __init__(self):

        pass # we may later need init code for network setup

    def get_levels_as_sub(self):

        """Subclasses must implement this method and return a Submaster

        object."""

    def get_dmx_list(self):

        maxes = self.get_levels_as_sub()

        return maxes.get_dmx_list()

    def send_sub(self, sub):

        levels = sub.get_dmx_list()

        dmxclient.outputlevels(levels)

    def send_levels(self):

        levels = self.get_dmx_list()

        dmxclient.outputlevels(levels)

    def send_levels_loop(self, delay=1000):

        """This function assumes that we are an instance of a Tk object

        (or at least that we have an 'after' method)"""

        self.send_levels()

        self.after(delay, self.send_levels_loop, delay)

    def send_zeroes(self):

        self.send_sub(Submaster('empty', {}, temporary=1))