Potential bug in DataLoader2 when seed = 0

[NivekT]

🐛 Describe the bug

If you try to set the seed = 0 as such:

dp = IterableWrapper(range(20)).shuffle()
rs = MultiProcessingReadingService(num_workers=2)

dl = DataLoader2(datapipe=dp, reading_service=rs)
dl.seed(0)

The seed will not be set because this line returns False. I think the true intention is to skip over None, but 0 also gets skipped as it is currently implemented.

data/torchdata/dataloader2/dataloader2.py

Line 203 in 7d97475

if self._seed:

I suppose we can say seed = 0 is invalid but it is probably better to check for self._seed is not None instead.

Versions

main

[NivekT]

Fixed as #1098 has landed