tf.data.experimental.cardinality

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Returns the cardinality of dataset, if known.

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Compat aliases for migration

See Migration guide for more details.

tf.compat.v1.data.experimental.cardinality, `tf.compat.v2.data.experimental.cardinality`

tf.data.experimental.cardinality(
    dataset
)

The operation returns the cardinality of dataset. The operation may return tf.data.experimental.INFINITE_CARDINALITY if dataset contains an infinite number of elements or tf.data.experimental.UNKNOWN_CARDINALITY if the analysis fails to determine the number of elements in dataset (e.g. when the dataset source is a file).

Args
dataset	A tf.data.Dataset for which to determine cardinality.

Returns
A scalar tf.int64 Tensor representing the cardinality of dataset. If the cardinality is infinite or unknown, the operation returns the named constant INFINITE_CARDINALITY and UNKNOWN_CARDINALITY respectively.