# get_derived_dataset

## nominal.experimental.derived_datasets.get_derived_dataset(client, dataset)

Retrieve a derived dataset by RID, or as the derived counterpart of a `Dataset` looked up through core.

Raises:
:   [**ValueError**](https://docs.python.org/3/builtins/exceptions.html#ValueError "(in Python v3.15)") – If the dataset is not derived.

Return type:
:   [*DerivedDataset*](https://dev.nominal.io/python/ref/generated/nominal.experimental.derived_datasets.DerivedDataset.md#nominal.experimental.derived_datasets.DerivedDataset "nominal.experimental.derived_datasets._derived_datasets.DerivedDataset")