YOLOv8-16bit/docs/reference/yolo/utils/callbacks/wb.md

description
Learn how to use Ultralytics YOLO's built-in callbacks `on_pretrain_routine_start` and `on_train_epoch_end` for improved training performance.

on_pretrain_routine_start

---

:::ultralytics.yolo.utils.callbacks.wb.on_pretrain_routine_start

on_fit_epoch_end

---

:::ultralytics.yolo.utils.callbacks.wb.on_fit_epoch_end

on_train_epoch_end

---

:::ultralytics.yolo.utils.callbacks.wb.on_train_epoch_end

on_train_end

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:::ultralytics.yolo.utils.callbacks.wb.on_train_end