description: Learn about the Ultralytics BaseValidator module. Understand its principles, uses, and how it interacts with other components.

keywords: Ultralytics, BaseValidator, Ultralytics engine, module, components

Reference for `ultralytics/engine/validator.py`

!!! note

Full source code for this file is available at [https://github.com/ultralytics/ultralytics/blob/main/ultralytics/engine/validator.py](https://github.com/ultralytics/ultralytics/blob/main/ultralytics/engine/validator.py). Help us fix any issues you see by submitting a [Pull Request](https://docs.ultralytics.com/help/contributing/) 🛠️. Thank you 🙏!

::: ultralytics.engine.validator.BaseValidator