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PiperOrigin-RevId: 264196955

PiperOrigin-RevId: 263879950

Also add `worker_hosts` and `task_index` flags.  These flags enable running the
model over multiple hosts by passing the cluster information via command line.

Setting `TF_CONFIG` will continue to work.

PiperOrigin-RevId: 263825245

* Restructure resnet estimator code to under official/r1

* Continue moving resnet code...

* Improved README.md

* Merged commit includes the following changes:
258867180  by jingli<jingli@google.com>:

    Add new folders for upcoming reorg in model garden.

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258893811  by hongkuny<hongkuny@google.com>:

    Adds summaries for metrics, allowing metrics inside keras.model.

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258893048  by isaprykin<isaprykin@google.com>:

    Remove the `cloning` argument to `compile()`.

    Keras models are distributed by cloning in graph mode and without cloning in eager mode as of the change # 258652546.

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258881002  by hongkuny<hongkuny@google.com>:

    Fix lint.

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258874998  by hongkuny<hongkuny@google.com>:

    Internal

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258872662  by hongkuny<hongkuny@google.com>:

    Fix doc

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PiperOrigin-RevId: 258867180

* Create __init__.py

* Update __init__.py

* Update __init__.py

* Update __init__.py