---
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 🙏!
## ::: ultralytics.data.build.InfiniteDataLoader
## ::: ultralytics.data.build._RepeatSampler
## ::: ultralytics.data.build.seed_worker
## ::: ultralytics.data.build.build_yolo_dataset
## ::: ultralytics.data.build.build_grounding
## ::: ultralytics.data.build.build_dataloader
## ::: ultralytics.data.build.check_source
## ::: ultralytics.data.build.load_inference_source