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Adds reshuffle_each_iteration argument to deterministic_data.create_dataset(). #356

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Adds reshuffle_each_iteration argument to deterministic_data.create_dataset(). #356

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10 changes: 9 additions & 1 deletion clu/deterministic_data.py
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Original file line number Diff line number Diff line change
Expand Up @@ -372,6 +372,7 @@ def create_dataset(dataset_builder: DatasetBuilder,
num_epochs: Optional[int] = None,
shuffle: bool = True,
shuffle_buffer_size: int = 10_000,
reshuffle_each_iteration: Optional[bool] = None,
prefetch_size: int = 4,
pad_up_to_batches: Optional[Union[int, str]] = None,
cardinality: Optional[int] = None,
Expand Down Expand Up @@ -402,6 +403,9 @@ def create_dataset(dataset_builder: DatasetBuilder,
forever.
shuffle: Whether to shuffle the dataset (both on file and example level).
shuffle_buffer_size: Number of examples in the shuffle buffer.
reshuffle_each_iteration: A boolean, which if true indicates that the
dataset should be pseudorandomly reshuffled each time it is iterated over.
(Defaults to `True`.)
prefetch_size: The number of elements in the final dataset to prefetch in
the background. This should be a small (say <10) positive integer or
tf.data.experimental.AUTOTUNE.
Expand Down Expand Up @@ -453,7 +457,11 @@ def create_dataset(dataset_builder: DatasetBuilder,
ds = ds.cache()

if shuffle:
ds = ds.shuffle(shuffle_buffer_size, seed=rngs.pop()[0])
ds = ds.shuffle(
shuffle_buffer_size,
seed=rngs.pop()[0],
reshuffle_each_iteration=reshuffle_each_iteration,
)
ds = ds.repeat(num_epochs)

if preprocess_fn is not None:
Expand Down