[python] add type hints to _safe_call (#4641)

Co-authored-by: strobel <[email protected]> Co-authored-by: Nikita Titov <[email protected]>
microsoft · Oct 7, 2021 · 7fa07ee · 7fa07ee
1 parent df8c10b
commit 7fa07ee
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/python-package/lightgbm/basic.py b/python-package/lightgbm/basic.py
@@ -113,7 +113,7 @@ def _load_lib():
 NUMERIC_TYPES = (int, float, bool)
 
 
-def _safe_call(ret):
+def _safe_call(ret: int) -> None:
     """Check the return value from C API call.
 
     Parameters