# skfolio.utils.tools.safe_indexing ### skfolio.utils.tools.safe_indexing(X, indices, axis=0) Return rows, items or columns of X using indices. * **Parameters:** **X** *array-like* : Data from which to sample rows. **indices** *array-like, slice, or None* : Indices, slice, or None. When `None`, the entire data is returned. When a `slice`, standard Python slicing is used (zero-copy for NumPy arrays and [`AssetPanel`](https://skfolio.org/generated/skfolio.containers.AssetPanel.html.md#skfolio.containers.AssetPanel)). **axis** *int, default=0* : The axis along which `X` will be sub-sampled. `axis=0` will select rows while `axis=1` will select columns. * **Returns:** subset : Subset of X on axis 0.