退购1.1定位算法

docs/reference/yolo/utils/callbacks/hub.md

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+---
+description: Improve YOLOv5 model training with Ultralytics' on-train callbacks. Boost performance on-pretrain-routine-end, model-save, train/predict start.
+---
+
+# on_pretrain_routine_end
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_pretrain_routine_end
+<br><br>
+
+# on_fit_epoch_end
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_fit_epoch_end
+<br><br>
+
+# on_model_save
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_model_save
+<br><br>
+
+# on_train_end
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_train_end
+<br><br>
+
+# on_train_start
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_train_start
+<br><br>
+
+# on_val_start
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_val_start
+<br><br>
+
+# on_predict_start
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_predict_start
+<br><br>
+
+# on_export_start
+---
+:::ultralytics.yolo.utils.callbacks.hub.on_export_start
+<br><br>