def get_epoch_iterator(self, **kwargs):
        self.child_epoch_iterator = self.data_stream.get_epoch_iterator()
        return super(Transformer, self).get_epoch_iterator(**kwargs)
add a number to a dial, convience method
dataset/ETHPy150Open mila-udem/fuel/fuel/transformers/__init__.py/Transformer.get_epoch_iterator--crossover with--dataset/ETHPy150Open plivo/plivohelper-python/tests/test_restxml.py/TestDial.testAddNumberConvience