docs/en/reference/utils/callbacks/platform.md

---
description: Platform callback functions for console logging during YOLO11 training lifecycle events.
keywords: platform callbacks, training callbacks, console logging, YOLO11 training, lifecycle events, Ultralytics
---

# Reference for `ultralytics/utils/callbacks/platform.py`

!!! success "Improvements"

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

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## ::: ultralytics.utils.callbacks.platform.on_pretrain_routine_start

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## ::: ultralytics.utils.callbacks.platform.on_pretrain_routine_end

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## ::: ultralytics.utils.callbacks.platform.on_fit_epoch_end

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## ::: ultralytics.utils.callbacks.platform.on_model_save

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## ::: ultralytics.utils.callbacks.platform.on_train_end

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## ::: ultralytics.utils.callbacks.platform.on_train_start

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## ::: ultralytics.utils.callbacks.platform.on_val_start

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## ::: ultralytics.utils.callbacks.platform.on_predict_start

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## ::: ultralytics.utils.callbacks.platform.on_export_start

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