fix optional check

pyapp-kit · Aug 5, 2021 · 1711a8e · 1711a8e
1 parent 481f665
commit 1711a8e
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/magicgui/type_map.py b/magicgui/type_map.py
@@ -83,7 +83,7 @@ def _normalize_type(value: Any, annotation: Any) -> tuple[type, bool]:
     origin = get_origin(annotation)
     args = get_args(annotation)
     if origin is Union and len(args) == 2 and type(None) in args:
-        type_ = next(i for i in args if not issubclass(i, type(None)))
+        type_ = next(i for i in args if not isinstance(i, type(None)))
         return type_, True
     return (origin or annotation), False