Use Optional instead of Union[*, None]

Co-authored-by: Gen <[email protected]>
HideakiImamura · Sep 28, 2023 · ee42e7e · ee42e7e
1 parent 1b89d98
commit ee42e7e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/optuna/integration/sklearn.py b/optuna/integration/sklearn.py
@@ -52,7 +52,7 @@
 OneDimArrayLikeType = Union[List[float], np.ndarray, "pd.Series"]
 TwoDimArrayLikeType = Union[List[List[float]], np.ndarray, "pd.DataFrame", "spmatrix"]
 IterableType = Union[List, "pd.DataFrame", np.ndarray, "pd.Series", "spmatrix", None]
-IndexableType = Union[Iterable, None]
+IndexableType = Optional[Iterable]
 
 _logger = logging.get_logger(__name__)