tf.raw_ops.MapAndBatchDataset
Creates a dataset that fuses mapping with batching.
tf.raw_ops.MapAndBatchDataset( input_dataset, other_arguments, batch_size, num_parallel_calls, drop_remainder, f, output_types, output_shapes, preserve_cardinality=False, name=None )
Creates a dataset that applies f
to the outputs of input_dataset
and then batches batch_size
of them.
Unlike a "MapDataset", which applies f
sequentially, this dataset invokes up to batch_size * num_parallel_batches
copies of f
in parallel.
Args | |
---|---|
input_dataset | A Tensor of type variant . A variant tensor representing the input dataset. |
other_arguments | A list of Tensor objects. A list of tensors, typically values that were captured when building a closure for f . |
batch_size | A Tensor of type int64 . A scalar representing the number of elements to accumulate in a batch. It determines the number of concurrent invocations of f that process elements from input_dataset in parallel. |
num_parallel_calls | A Tensor of type int64 . A scalar representing the maximum number of parallel invocations of the map_fn function. Applying the map_fn on consecutive input elements in parallel has the potential to improve input pipeline throughput. |
drop_remainder | A Tensor of type bool . A scalar representing whether the last batch should be dropped in case its size is smaller than desired. |
f | A function decorated with @Defun. A function to apply to the outputs of input_dataset . |
output_types | A list of tf.DTypes that has length >= 1 . |
output_shapes | A list of shapes (each a tf.TensorShape or list of ints ) that has length >= 1 . |
preserve_cardinality | An optional bool . Defaults to False . |
name | A name for the operation (optional). |
Returns | |
---|---|
A Tensor of type variant . |
© 2020 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 3.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r2.4/api_docs/python/tf/raw_ops/MapAndBatchDataset