Skip to content

Updated iterable dataset with len warning message #6972

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
merged 4 commits into from
Apr 13, 2021
Merged

Updated iterable dataset with len warning message #6972

Changes from all commits
Commits
Show all changes
4 commits
Select commit Hold shift + click to select a range
db4685e
Updated iterable dataset with len warning message
ozen Apr 12, 2021
faccb48
Fixed pep8 issue
ozen Apr 12, 2021
c655804
Fixed typo
ozen Apr 12, 2021
1a82a09
Merge branch 'master' into patch-1
carmocca Apr 13, 2021
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
5 changes: 3 additions & 2 deletions pytorch_lightning/utilities/data.py
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -40,8 +40,9 @@ def has_len(dataloader: DataLoader) -> bool:
if has_len and has_iterable_dataset(dataloader):
rank_zero_warn(
'Your `IterableDataset` has `__len__` defined.'
' In combination with multi-processing data loading (e.g. batch size > 1),'
' this can lead to unintended side effects since the samples will be duplicated.'
' In combination with multi-process data loading (when num_workers > 1),'
' `__len__` could be inaccurate if each worker is not configured independently'
' to avoid having duplicate data.'
)
return has_len

Expand Down