add hints on wrapper

microsoft · Aug 18, 2021 · a1bec4e · a1bec4e
1 parent fbca9f4
commit a1bec4e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/python-package/lightgbm/basic.py b/python-package/lightgbm/basic.py
@@ -63,7 +63,7 @@ def _normalize_native_string(func: Callable[[str], None]) -> Callable[[str], Non
     msg_normalized: List[str] = []
 
     @wraps(func)
-    def wrapper(msg):
+    def wrapper(msg: str) -> None:
         nonlocal msg_normalized
         if msg.strip() == '':
             msg = ''.join(msg_normalized)