# tinker_cookbook.supervised.SupervisedDatasetBuilder

## *class* [**tinker_cookbook.supervised.SupervisedDatasetBuilder**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/supervised/types.py#L55)()

A `chz` config class that knows how to construct a supervised dataset.

The dataset is usually a chat dataset but does not need to be; it could be raw tokens. Subclasses must implement `__call__`.

### [**__call__**](https://github.com/thinking-machines-lab/tinker-cookbook/blob/main/tinker_cookbook/supervised/types.py#L62)()

Build and return (train_dataset, eval_dataset).

**Returns:** *tuple\[[SupervisedDataset](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/supervised/superviseddataset/index.md), [SupervisedDataset](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/supervised/superviseddataset/index.md) | None\]* – The training dataset and an optional evaluation dataset.

## Referenced by

- [tinker_cookbook.distillation.DatasetWithTeacher](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/distillation/datasetwithteacher/index.md)
- [tinker_cookbook.supervised.ChatDatasetBuilder](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/supervised/chatdatasetbuilder/index.md)
- [tinker_cookbook.supervised.Config](https://tinker-docs.thinkingmachines.ai/cookbook/api-reference/supervised/config/index.md)