tensorplay.autograd.graph API

Store saved values in host memory and restore their original device.

Context manager that installs a (pack, unpack) pair for every tensor saved via Function()’s save_for_backward while active.

• pack_hook(tensor) runs once per saved tensor at save time and may return any object (e.g. a CPU copy, a key into external storage).

• unpack_hook(packed) runs when ctx.saved_tensors reads it back and must return an equivalent tensorplay.Tensor.

If either hook raises, the exception is surfaced from the corresponding operation.