`tf.unstack`. * `TensorArray.pack` and `TensorArray.unpack` are getting
deprecated in favor of `TensorArray.stack` and `TensorArray.unstack`. * The
following Python functions have had their arguments changed to use `axis` when
referring to specific dimensions. We have kept the old keyword arguments for
compatibility currently, but we will be removing them well before the final 1.0.
* `tf.argmax`: `dimension` becomes `axis` * `tf.argmin`: `dimension` becomes