# skfolio.utils.tools.safe_split ### skfolio.utils.tools.safe_split(X, y=None, indices=None, axis=0) Create subset of dataset. Slice X, y according to indices for cross-validation. * **Parameters:** **X** *array-like* : Data to be indexed. **y** *array-like* : Data to be indexed. **indices** *ndarray of int, optional* : Rows or columns to select from X and y. The default (`None`) is to select the entire data. **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:** **X_subset** *array-like* : Indexed data. **y_subset** *array-like* : Indexed targets.