---
description: Deep dive into Ultralytics callbacks. Learn how to use the _log_plots, on_fit_epoch_end, and on_train_end functions effectively.
keywords: Ultralytics, callbacks, _log_plots, on_fit_epoch_end, on_train_end
---

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

## on_pretrain_routine_start
---
### ::: ultralytics.utils.callbacks.wb.on_pretrain_routine_start
<br><br>

## on_fit_epoch_end
---
### ::: ultralytics.utils.callbacks.wb.on_fit_epoch_end
<br><br>

## on_train_epoch_end
---
### ::: ultralytics.utils.callbacks.wb.on_train_epoch_end
<br><br>

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