def get_data(self, request=None):
        if request is None:
            raise ValueError
        data = [[] for _ in self.sources]
        for i in range(request):
            try:
                for source_data, example in zip(
                        data, next(self.child_epoch_iterator)):
                    source_data.append(example)
            except StopIteration:
                # If some data has been extracted and `strict` is not set,
                # we should spit out this data before stopping iteration.
                if not self.strictness and data[0]:
                    break
                elif self.strictness > 1 and data[0]:
                    raise ValueError
                raise
        return tuple(numpy.asarray(source_data) for source_data in data)
Get data from the dataset.
dataset/ETHPy150Open mila-udem/fuel/fuel/transformers/__init__.py/Batch.get_data