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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def removeCallback(cls, eventType, func, record=None):
 """ Removes a callback from the model's event callbacks. :param eventType: <str> :param func: <callable> """

        callbacks = cls.callbacks()
        callbacks.setdefault(eventType, [])
        for i in xrange(len(callbacks[eventType])):
            my_func, my_record, _ = callbacks[eventType][i]
            if func == my_func and record == my_record:
                del callbacks[eventType][i]
                break