Vehicle-cpp/hkpc/ultralytics-main/docs/reference/utils/callbacks/dvc.md

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description: Browse through Ultralytics YOLO docs to learn about important logging and callback functions used in training and pretraining models.

keywords: Ultralytics, YOLO, callbacks, logger, training, pretraining, machine learning, models

Reference for ultralytics/utils/callbacks/dvc.py

!!! note

Full source code for this file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/dvc.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/dvc.py). Help us fix any issues you see by submitting a [Pull Request](https://docs.ultralytics.com/help/contributing/) 🛠️. Thank you 🙏!

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::: ultralytics.utils.callbacks.dvc._log_images

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::: ultralytics.utils.callbacks.dvc._log_plots

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::: ultralytics.utils.callbacks.dvc._log_confusion_matrix

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::: ultralytics.utils.callbacks.dvc.on_pretrain_routine_start

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::: ultralytics.utils.callbacks.dvc.on_pretrain_routine_end

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::: ultralytics.utils.callbacks.dvc.on_train_start

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::: ultralytics.utils.callbacks.dvc.on_train_epoch_start

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::: ultralytics.utils.callbacks.dvc.on_fit_epoch_end

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::: ultralytics.utils.callbacks.dvc.on_train_end