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/TensorFlow 2.9

tf.RaggedTensorSpec

Type specification for a tf.RaggedTensor.

Inherits From: TypeSpec, TraceType

tf.RaggedTensorSpec(
    shape=None,
    dtype=tf.dtypes.float32,
    ragged_rank=None,
    row_splits_dtype=tf.dtypes.int64,
    flat_values_spec=None
)
Args
shape The shape of the RaggedTensor, or None to allow any shape. If a shape is specified, then all ragged dimensions must have size None.
dtype tf.DType of values in the RaggedTensor.
ragged_rank Python integer, the number of times the RaggedTensor's flat_values is partitioned. Defaults to shape.ndims - 1.
row_splits_dtype dtype for the RaggedTensor's row_splits tensor. One of tf.int32 or tf.int64.
flat_values_spec TypeSpec for flat_value of the RaggedTensor. It shall be provided when the flat_values is a CompositeTensor rather then Tensor. If both dtype and flat_values_spec and are provided, dtype must be the same as flat_values_spec.dtype. (experimental)
Attributes
dtype The tf.dtypes.DType specified by this type for the RaggedTensor. 
rt = tf.ragged.constant([["a"], ["b", "c"]], dtype=tf.string)
tf.type_spec_from_value(rt).dtype
tf.string
flat_values_spec The TypeSpec of the flat_values of RaggedTensor.
ragged_rank The number of times the RaggedTensor's flat_values is partitioned.

Defaults to shape.ndims - 1.

values = tf.ragged.constant([[1, 2, 3], [4], [5, 6], [7, 8, 9, 10]])
tf.type_spec_from_value(values).ragged_rank
1

rt1 = tf.RaggedTensor.from_uniform_row_length(values, 2)
tf.type_spec_from_value(rt1).ragged_rank
2
row_splits_dtype The tf.dtypes.DType of the RaggedTensor's row_splits. 
rt = tf.ragged.constant([[1, 2, 3], [4]], row_splits_dtype=tf.int64)
tf.type_spec_from_value(rt).row_splits_dtype
tf.int64
shape The statically known shape of the RaggedTensor. 
rt = tf.ragged.constant([[0], [1, 2]])
tf.type_spec_from_value(rt).shape
TensorShape([2, None])

rt = tf.ragged.constant([[[0, 1]], [[1, 2], [3, 4]]], ragged_rank=1)
tf.type_spec_from_value(rt).shape
TensorShape([2, None, 2])
value_type The Python type for values that are compatible with this TypeSpec.

In particular, all values that are compatible with this TypeSpec must be an instance of this type.

Methods

from_value

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@classmethod
from_value(
    value
)

is_compatible_with

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is_compatible_with(
    spec_or_value
)

Returns true if spec_or_value is compatible with this TypeSpec.

Prefer using "is_subtype_of" and "most_specific_common_supertype" wherever possible.

Args
spec_or_value A TypeSpec or TypeSpec associated value to compare against.

is_subtype_of

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is_subtype_of(
    other: tf.types.experimental.TraceType
) -> bool

Returns True if self is a subtype of other.

Implements the tf.types.experimental.func.TraceType interface.

If not overridden by a subclass, the default behavior is to assume the TypeSpec is covariant upon attributes that implement TraceType and invariant upon rest of the attributes as well as the structure and type of the TypeSpec.

Args
other A TraceType object.

most_specific_common_supertype

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most_specific_common_supertype(
    others: Sequence[tf.types.experimental.TraceType]
) -> Optional['TypeSpec']

Returns the most specific supertype TypeSpec of self and others.

Implements the tf.types.experimental.func.TraceType interface.

If not overridden by a subclass, the default behavior is to assume the TypeSpec is covariant upon attributes that implement TraceType and invariant upon rest of the attributes as well as the structure and type of the TypeSpec.

Args
others A sequence of TraceTypes.

most_specific_compatible_type

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most_specific_compatible_type(
    other: 'TypeSpec'
) -> 'TypeSpec'

Returns the most specific TypeSpec compatible with self and other. (deprecated)

Deprecated. Please use most_specific_common_supertype instead. Do not override this function.

Args
other A TypeSpec.
Raises
ValueError If there is no TypeSpec that is compatible with both self and other.

__eq__

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__eq__(
    other
) -> bool

Return self==value.

__ne__

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__ne__(
    other
) -> bool

Return self!=value.

© 2022 The TensorFlow Authors. All rights reserved.
Licensed under the Creative Commons Attribution License 4.0.
Code samples licensed under the Apache 2.0 License.
https://www.tensorflow.org/versions/r2.9/api_docs/python/tf/RaggedTensorSpec