---
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
---

## _logger_disabled
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### ::: ultralytics.utils.callbacks.dvc._logger_disabled
<br><br>

## _log_images
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### ::: ultralytics.utils.callbacks.dvc._log_images
<br><br>

## _log_plots
---
### ::: ultralytics.utils.callbacks.dvc._log_plots
<br><br>

## _log_confusion_matrix
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### ::: ultralytics.utils.callbacks.dvc._log_confusion_matrix
<br><br>

## on_pretrain_routine_start
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### ::: ultralytics.utils.callbacks.dvc.on_pretrain_routine_start
<br><br>

## on_pretrain_routine_end
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### ::: ultralytics.utils.callbacks.dvc.on_pretrain_routine_end
<br><br>

## on_train_start
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### ::: ultralytics.utils.callbacks.dvc.on_train_start
<br><br>

## on_train_epoch_start
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### ::: ultralytics.utils.callbacks.dvc.on_train_epoch_start
<br><br>

## on_fit_epoch_end
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### ::: ultralytics.utils.callbacks.dvc.on_fit_epoch_end
<br><br>

## on_train_end
---
### ::: ultralytics.utils.callbacks.dvc.on_train_end
<br><br>