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Tensor Handle Operations

Note: Functions taking Tensor arguments can also take anything accepted by tf.convert_to_tensor.

[TOC]

Tensor Handle Operations.

TensorFlow provides several operators that allows the user to keep tensors "in-place" across run calls.

tf.get_session_handle(data, name=None) {#get_session_handle}

Return the handle of data.

This is EXPERIMENTAL and subject to change.

Keep data "in-place" in the runtime and create a handle that can be used to retrieve data in a subsequent run().

Combined with get_session_tensor, we can keep a tensor produced in one run call in place, and use it as the input in a future run call.

Args:
  • data: A tensor to be stored in the session.
  • name: Optional name prefix for the return tensor.
Returns:

A scalar string tensor representing a unique handle for data.

Raises:

  • TypeError: if data is not a Tensor.

  • Example:

c = tf.multiply(a, b)
h = tf.get_session_handle(c)
h = sess.run(h)

p, a = tf.get_session_tensor(h.handle, tf.float32)
b = tf.multiply(a, 10)
c = sess.run(b, feed_dict={p: h.handle})

tf.get_session_tensor(handle, dtype, name=None) {#get_session_tensor}

Get the tensor of type dtype by feeding a tensor handle.

This is EXPERIMENTAL and subject to change.

Get the value of the tensor from a tensor handle. The tensor is produced in a previous run() and stored in the state of the session.

Args:
  • handle: The string representation of a persistent tensor handle.
  • dtype: The type of the output tensor.
  • name: Optional name prefix for the return tensor.
Returns:

A pair of tensors. The first is a placeholder for feeding a tensor handle and the second is the tensor in the session state keyed by the tensor handle.

  • Example:
c = tf.multiply(a, b)
h = tf.get_session_handle(c)
h = sess.run(h)

p, a = tf.get_session_tensor(h.handle, tf.float32)
b = tf.multiply(a, 10)
c = sess.run(b, feed_dict={p: h.handle})

tf.delete_session_tensor(handle, name=None) {#delete_session_tensor}

Delete the tensor for the given tensor handle.

This is EXPERIMENTAL and subject to change.

Delete the tensor of a given tensor handle. The tensor is produced in a previous run() and stored in the state of the session.

Args:
  • handle: The string representation of a persistent tensor handle.
  • name: Optional name prefix for the return tensor.
Returns:

A pair of graph elements. The first is a placeholder for feeding a tensor handle and the second is a deletion operation.