Fixed missing export for Huber loss as tf.keras.losses.huber and tf.keras.metrics.huber

[srihari-humbarwadi]

No description provided.

[pavithrasv]

Why is this required? Can we use the Huber loss class instead? The other loss functions are exported because they were available historically.

[srihari-humbarwadi]

This would make the API consistent, since all the other loss function are available as classes and also as functions. And yes we can use Huber loss class just like the rest of the loss classes

[pavithrasv]

Can we only add it to losses namespace for now? Also you will need to update golden files '.pbtxt' files for API changes.

[srihari-humbarwadi]

I have removed it from the tf.keras.metrics namespace, and also can you please let me know what .pbtxt files need changes?

[pavithrasv]

@mihaimaruseac can you advice on how API changes ie.pbtxt files can be updated?

[mihaimaruseac]

To generate the proto files used for API you need to run the api_compatibility_test with --update_goldens:

bazel build tensorflow/tools/api/tests:api_compatibility_test
bazel-bin/tensorflow/tools/api/tests/api_compatibility_test --update_goldens=True

Then, this will need an API review (there are weekly meetings for this) and API approval before being imported

[alextp]

As tensorflow/api-owners: we'd rather keep Huber as class-only (as well any future losses).