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Merged
copybara-service merged 1 commit into from
Mar 20, 2026
+7 −1
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internal. #1249

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8 changes: 7 additions & 1 deletion grain/_src/python/dataset/dataset.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1708,6 +1708,12 @@ def __init__(self, parent: IterDataset[T], options: base.DatasetOptions):
self.options = options

def __iter__(self) -> DatasetIterator[T]:
"""Returns an iterator for the dataset.

Propagates the options through the pipeline ensuring there's a single merged
options object. Depending on the options, may apply iterator
transformations.
"""
result = self._parent.__iter__()
# The parent iterator options are merged from the entire subtree. Merge
# them with the latest options and update the subtree options.
Expand Down Expand Up @@ -1737,7 +1743,7 @@ class _OutputIterDataset(IterDataset[T]):
"""Dataset that is injected at the end of every pipeline."""

def __iter__(self) -> DatasetIterator[T]:
"""Performs any injection that needs to happen at the end of the pipeline."""
"""Performs injections that need to happen at the end of the pipeline."""

# Loaded lazily due to a circular dependency (dataset <-> prefetch).
# pylint: disable=g-import-not-at-top
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