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* Keras callback to push to hub each epoch, or after N steps * Reworked the callback to use Repository * Use an Enum for save_strategy * Style pass * Correct type for tokenizer * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Update src/transformers/keras_callbacks.py Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com> * Adding print message to the final upload * Adding print message to the final upload * Change how we wait for the last process to finish * is_done is a property, not a method, derp * Docstrings and documentation * Style pass * Style edit * Docstring reformat * Docstring rewrite * Replacing print with internal logger Co-authored-by: Sylvain Gugger <35901082+sgugger@users.noreply.github.com>