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Internal #1379

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20 changes: 16 additions & 4 deletions grain/_src/python/dataset/dataset.py
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Original file line number Diff line number Diff line change
Expand Up @@ -509,7 +509,10 @@ def filter(
# pylint: enable=g-import-not-at-top
return filter_dataset.FilterMapDataset(parent=self, transform=transform)

def map(self, transform: transforms.Map | Callable[[T], S]) -> MapDataset[S]:
def map(
self,
transform: transforms.Map | Callable[[T], S],
) -> MapDataset[S]:
"""Returns a dataset containing the elements transformed by ``transform``.

Example usage::
Expand All @@ -532,7 +535,10 @@ def map(self, transform: transforms.Map | Callable[[T], S]) -> MapDataset[S]:
map as map_dataset,
)
# pylint: enable=g-import-not-at-top
return map_dataset.MapMapDataset(parent=self, transform=transform)
return map_dataset.MapMapDataset(
parent=self,
transform=transform,
)

def map_with_index(
self,
Expand Down Expand Up @@ -1193,7 +1199,10 @@ def filter(
# pylint: enable=g-import-not-at-top
return filter_dataset.FilterIterDataset(parent=self, transform=transform)

def map(self, transform: transforms.Map | Callable[[T], S]) -> IterDataset[S]:
def map(
self,
transform: transforms.Map | Callable[[T], S],
) -> IterDataset[S]:
"""Returns a dataset containing the elements transformed by ``transform``.

Example usage::
Expand All @@ -1216,7 +1225,10 @@ def map(self, transform: transforms.Map | Callable[[T], S]) -> IterDataset[S]:
map as map_dataset,
)
# pylint: enable=g-import-not-at-top
return map_dataset.MapIterDataset(parent=self, transform=transform)
return map_dataset.MapIterDataset(
parent=self,
transform=transform,
)

def random_map(
self,
Expand Down