---
description: Explore the Ultralytics YOLO v3 data build procedures, including the InfiniteDataLoader, seed_worker, build_dataloader, and load_inference_source.
keywords: Ultralytics, YOLO v3, Data build, DataLoader, InfiniteDataLoader, seed_worker, build_dataloader, load_inference_source
---

# Reference for `ultralytics/data/build.py`

!!! Note

    This file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/data/build.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/data/build.py). If you spot a problem please help fix it by [contributing](../../help/contributing.md) a [Pull Request](https://github.com/ultralytics/ultralytics/edit/main/ultralytics/data/build.py) 🛠️. Thank you 🙏!

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## ::: ultralytics.data.build.InfiniteDataLoader

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## ::: ultralytics.data.build._RepeatSampler

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## ::: ultralytics.data.build.seed_worker

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## ::: ultralytics.data.build.build_yolo_dataset

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## ::: ultralytics.data.build.build_grounding

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## ::: ultralytics.data.build.build_dataloader

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## ::: ultralytics.data.build.check_source

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## ::: ultralytics.data.build.load_inference_source

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