> ## Documentation Index
> Fetch the complete documentation index at: https://docs.activeviam.com/llms.txt
> Use this file to discover all available pages before exploring further.

# atoti_ai.AutoExplain.included_hierarchies

#### *property* AutoExplain.included\_hierarchies *: [Set](https://docs.python.org/3/library/collections.abc.html#collections.abc.Set)\[HasIdentifier\[HierarchyIdentifier] | HierarchyIdentifier] | [None](https://docs.python.org/3/library/constants.html#None)*

The hierarchies exploration is restricted to.

`None` if all hierarchies are included.

```pycon theme={"languages":{"custom":["/engine/python-sdk/0.9/languages/pycon.tmLanguage.json"]}}
>>> table = session.create_table("Example", data_types={"Country": "String"})
>>> cube = session.create_cube(table)
>>> h = cube.hierarchies
>>> print(cube.auto_explain.included_hierarchies)
None
>>> cube.auto_explain.included_hierarchies = {h["Country"]}
>>> sorted(cube.auto_explain.included_hierarchies)
[h['Example', 'Country']]
>>> del cube.auto_explain.included_hierarchies
>>> print(cube.auto_explain.included_hierarchies)
None
```

<Callout icon="link">
  **See also**:
  [`included_hierarchies_per_measure()`](./atoti_ai.AutoExplain.included_hierarchies_per_measure#atoti_ai.AutoExplain.included_hierarchies_per_measure).
</Callout>