Use the safer `safe_load` function instead of `unsafe_load` when poss…

…ible

There is no need to open ourselves up to arbitrary code execution, especially since this is not in a performance critical loop, so we can take the slowdown due to safety.

PiperOrigin-RevId: 388501098

Add more explicit error message for instance type checking of optimizer.

PiperOrigin-RevId: 382409145

Internal change

PiperOrigin-RevId: 382327442

Add ParameterServerStrategy combination to ketrics_metrics_test.

PiperOrigin-RevId: 381424814

Redirect Keras to tf.keras (keras-team#14121)

* Replace all code with tf.keras redirects

Prepare 2.3.1 release

Update README

Fix sklearn regressor test?

Prepare 2.2.4 release.

[RELNOTES] [P] Write to TensorBoard every x samples. (keras-team#11152)

* Working on improving tensor flow callbacks

* Adding batch level TensorBoard logging (implementing the `on_batch_end` method to the TensorBoard class

* Interim commit -- added notes.

* Corrected stylistic issues -- brought to compliance w/ PEP8

* Added the missing argument in the test suite.

* Added the possibility to choose how frequently tensorboard should log
the metrics and losses.

* Fixed the issue of the validation data not being displayed.

* Fixed the issue about the callback not remembering when was the last
time it wrote to the logs.

* Removed the error check.

* Used update_freq instead of write_step.

* Forgot to change the constructor call.