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Creates or finds a child frame, and makes data available to the child frame.

This op is used together with Exit to create loops in the graph. The unique frame_name is used by the Executor to identify frames. If is_constant is true, output is a constant in the child frame; otherwise it may be changed in the child frame. At most parallel_iterations iterations are run in parallel in the child frame.

data A Tensor. The tensor to be made available to the child frame.
frame_name A string. The name of the child frame.
is_constant An optional bool. Defaults to False. If true, the output is constant within the child frame.
parallel_iterations An optional int. Defaults to 10. The number of iterations allowed to run in parallel.
name A name for the operation (optional).

A Tensor. Has the same type as data.