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Adds Checkpoint adapter for TPU Embeddings. #753

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Adds Checkpoint adapter for TPU Embeddings. #753

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7 changes: 5 additions & 2 deletions tf_keras/optimizers/legacy/optimizer_v2.py
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Original file line number Diff line number Diff line change
Expand Up @@ -1540,7 +1540,8 @@ def _restore_slot_variable(self, slot_name, variable, slot_variable):
checkpoint_position.restore(slot_variable)

def _create_or_restore_slot_variable(
self, slot_variable_position, slot_name, variable
self, slot_variable_position, slot_name, variable,
slot_variable_shape=None
):
"""Returns the slot variable that should have a value restored into it.

Expand All @@ -1563,6 +1564,8 @@ def _create_or_restore_slot_variable(
indicating the slot variable `Trackable` object to be restored.
slot_name: The name of this `Optimizer`'s slot to restore into.
variable: The variable object this slot is being created for.
slot_variable_shape: (Optional) Shape of the required slot variable.
When not provided, the shape is same as the value in checkpoint.

Returns:
A slot variable that should have a value restored into it, or None if
Expand Down Expand Up @@ -1602,7 +1605,7 @@ def _create_or_restore_slot_variable(
var=variable,
initializer=initializer,
slot_name=slot_name,
shape=slot_variable_position.value_shape(),
shape=slot_variable_position.value_shape() if slot_variable_shape is None else slot_variable_shape,
)
# Slot variables are not owned by any one object (because we don't
# want to save the slot variable if the optimizer is saved without
Expand Down
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