49 lines
1.4 KiB
Markdown
49 lines
1.4 KiB
Markdown
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---
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description: Explore detailed guides on Ultralytics callbacks, including pretrain, model save, train start/end, and more. Enhance your ML training workflows with ease.
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keywords: Ultralytics, callbacks, pretrain, model save, train start, train end, validation, predict, export, training, machine learning
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---
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# Reference for `ultralytics/utils/callbacks/hub.py`
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!!! Note
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This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/hub.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/utils/callbacks/hub.py). If you spot a problem please help fix it by [contributing](https://docs.ultralytics.com/help/contributing/) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/utils/callbacks/hub.py) 🛠️. Thank you 🙏!
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_pretrain_routine_start
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_pretrain_routine_end
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_fit_epoch_end
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_model_save
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_train_end
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_train_start
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_val_start
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_predict_start
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<br><br>
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## ::: ultralytics.utils.callbacks.hub.on_export_start
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<br><br>
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