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tf.ragged.constant

TensorFlow 2.0 version View source on GitHub

Constructs a constant RaggedTensor from a nested Python list.

Aliases:

  • tf.compat.v1.ragged.constant
  • tf.compat.v2.ragged.constant
tf.ragged.constant(
    pylist,
    dtype=None,
    ragged_rank=None,
    inner_shape=None,
    name=None,
    row_splits_dtype=tf.dtypes.int64
)

Example:

>>> ragged.constant([[1, 2], [3], [4, 5, 6]]).eval()
RaggedTensorValue(values=[1, 2, 3, 4, 5, 6], splits=[0, 2, 3, 6])

All scalar values in pylist must have the same nesting depth K, and the returned RaggedTensor will have rank K. If pylist contains no scalar values, then K is one greater than the maximum depth of empty lists in pylist. All scalar values in pylist must be compatible with dtype.

Args:

  • pylist: A nested list, tuple or np.ndarray. Any nested element that is not a list, tuple or np.ndarray must be a scalar value compatible with dtype.
  • dtype: The type of elements for the returned RaggedTensor. If not specified, then a default is chosen based on the scalar values in pylist.
  • ragged_rank: An integer specifying the ragged rank of the returned RaggedTensor. Must be nonnegative and less than K. Defaults to max(0, K - 1) if inner_shape is not specified. Defaults to `max(0, K
    • 1 - len(inner_shape))ifinner_shape` is specified.
  • inner_shape: A tuple of integers specifying the shape for individual inner values in the returned RaggedTensor. Defaults to () if ragged_rank is not specified. If ragged_rank is specified, then a default is chosen based on the contents of pylist.
  • name: A name prefix for the returned tensor (optional).
  • row_splits_dtype: data type for the constructed RaggedTensor's row_splits. One of tf.int32 or tf.int64.

Returns:

A potentially ragged tensor with rank K and the specified ragged_rank, containing the values from pylist.

Raises:

  • ValueError: If the scalar values in pylist have inconsistent nesting depth; or if ragged_rank or inner_shape are incompatible with pylist.