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ultralytics/docs/en/reference/utils/callbacks/hub.md
Glenn Jocher 3637f509dd
ultralytics 8.3.231 New Zensical docs refresh (#22761) 
Signed-off-by: Glenn Jocher <glenn.jocher@ultralytics.com>
Co-authored-by: UltralyticsAssistant <web@ultralytics.com>
2025-11-23 19:53:50 +01:00

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Explore detailed guides on Ultralytics callbacks, including pretrain, model save, train start/end, and more. Enhance your ML training workflows with ease. Ultralytics, callbacks, pretrain, model save, train start, train end, validation, predict, export, training, machine learning

Reference for ultralytics/utils/callbacks/hub.py

!!! success "Improvements"

This page is sourced from [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/hub.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/hub.py). Have an improvement or example to add? Open a [Pull Request](https://docs.ultralytics.com/help/contributing/) — thank you! 🙏

::: ultralytics.utils.callbacks.hub.on_pretrain_routine_start




::: ultralytics.utils.callbacks.hub.on_pretrain_routine_end




::: ultralytics.utils.callbacks.hub.on_fit_epoch_end




::: ultralytics.utils.callbacks.hub.on_model_save




::: ultralytics.utils.callbacks.hub.on_train_end




::: ultralytics.utils.callbacks.hub.on_train_start




::: ultralytics.utils.callbacks.hub.on_val_start




::: ultralytics.utils.callbacks.hub.on_predict_start




::: ultralytics.utils.callbacks.hub.on_export_start