Cherrypick 2 more changes for the optimizer docstring fix. (#17165)

* keras: fix typo in keras optimizers migration recommendation

  tf.keras.optimizer.legacy -> tf.keras.optimizers.legacy

PiperOrigin-RevId: 481720094

* Keras: Fix docstring for tf.keras.optimizer. -> tf.keras.optimizers.

PiperOrigin-RevId: 481721074

Co-authored-by: Michael Chinen <[email protected]>
Co-authored-by: A. Unique TensorFlower <[email protected]>

Author: 3 people

keras/mixed_precision/loss_scale_optimizer.py

@@ -1125,14 +1125,14 @@ def __init__(
                 # Give better error message if the OptimizerV2 class is passed
                 # instead of the new experimental optimizer.
                 raise TypeError(
-                    "You passed a `tf.keras.optimizer.Optimizer` instance to "
+                    "You passed a `tf.keras.optimizers.Optimizer` instance to "
                     "LossScaleOptimizerV3, but only the new experimental "
                     "optimizer defined in "
                     "keras/optimizer_expeirmental/optimizer.py can be "
                     "passed. Please use "
                     "`tf.keras.mixed_precision.LossScaleOptimizer` "
                     "instead of LossScaleOptimizerV3, as the former supports "
-                    "`tf.keras.optimizer.Optimizer`s. Got optimizer: "
+                    "`tf.keras.optimizers.Optimizer`s. Got optimizer: "
                     f"{inner_optimizer}"
                 )
             raise TypeError(

keras/optimizers/__init__.py

@@ -196,7 +196,7 @@ def convert_to_legacy_optimizer(optimizer):
 
     This function takes in a `tf.keras.optimizers.experimental.Optimizer`
     instance and converts it to the corresponding
-    `tf.keras.optimizer.legacy.Optimizer` instance.
+    `tf.keras.optimizers.legacy.Optimizer` instance.
     For example, `tf.keras.optimizers.experimental.Adam(...)` to
     `tf.keras.optimizers.legacy.Adam(...)`.
 

keras/optimizers/optimizer_experimental/optimizer.py

@@ -127,7 +127,7 @@ def _create_or_restore_slot_variable(self, **kwargs):
             "errors. Please update the optimizer referenced in your code "
             "to be an instance of "
             "`tf.keras.optimizers.legacy.Optimizer`, e.g.: "
-            f"`tf.keras.optimizer.legacy.{self.__class__.__name__}`."
+            f"`tf.keras.optimizers.legacy.{self.__class__.__name__}`."
         )
 
     def _var_key(self, variable):