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description: Uncover the specifics of Ultralytics ClearML callbacks, from pretrain routine start to training end. Boost your ML model performance.
keywords: Ultralytics, clearML, callbacks, pretrain routine start, validation end, train epoch end, training end
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# Reference for `ultralytics/utils/callbacks/clearml.py`

!!! Note

    This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/clearml.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/clearml.py). If you spot a problem please help fix it by [contributing](https://docs.ultralytics.com/help/contributing/) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/utils/callbacks/clearml.py) 🛠️. Thank you 🙏!

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## ::: ultralytics.utils.callbacks.clearml._log_debug_samples
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## ::: ultralytics.utils.callbacks.clearml._log_plot
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## ::: ultralytics.utils.callbacks.clearml.on_pretrain_routine_start
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## ::: ultralytics.utils.callbacks.clearml.on_train_epoch_end
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## ::: ultralytics.utils.callbacks.clearml.on_fit_epoch_end
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## ::: ultralytics.utils.callbacks.clearml.on_val_end
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## ::: ultralytics.utils.callbacks.clearml.on_train_end
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