Load data repeatedly in class CSVIterableDataset from monai/data/iterable_dataset.py

[Colwzq]

Describe the bug In iterable_dataset.py

def __iter__(self):
    if self.shuffle:
        self.seed += 1
        buffer = ShuffleBuffer(
            data=self._flattened(), transform=self.transform, buffer_size=self.buffer_size, seed=self.seed
        )
        yield from buffer
    yield from IterableDataset(data=self._flattened(), transform=self.transform)

This may cause loading data repeatedly, and maybe the code should be

def __iter__(self):
    if self.shuffle:
        self.seed += 1
        buffer = ShuffleBuffer(
            data=self._flattened(), transform=self.transform, buffer_size=self.buffer_size, seed=self.seed
        )
        yield from buffer
   else:
        yield from IterableDataset(data=self._flattened(), transform=self.transform)

If I understand the logic in the code incorrectly, please point it out directly, thanks a lot. To Reproduce Steps to reproduce the behavior:

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Expected behavior A clear and concise description of what you expected to happen.

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Environment

Ensuring you use the relevant python executable, please paste the output of:

python -c "import monai; monai.config.print_debug_info()"

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