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tft.sparse_tensor_left_align

Re-arranges a tf.SparseTensor and returns a left-aligned version of it.

This mapper can be useful when returning a sparse tensor that may not be left-aligned from a preprocessing_fn.

sparse_tensor A 2D tf.SparseTensor.

ValueError if sparse_tensor is not 2D.

A left-aligned version of sparse_tensor as a tf.SparseTensor.