fix: fix py37 (#243)

pyapp-kit · Nov 9, 2023 · b900ff2 · b900ff2
1 parent f47fd68
commit b900ff2
Showing 1 changed file with 4 additions and 1 deletion.
diff --git a/src/psygnal/_group_descriptor.py b/src/psygnal/_group_descriptor.py
@@ -423,7 +423,10 @@ def __get__(
 
             # clean up the cache when the instance is deleted
             with contextlib.suppress(TypeError):
-                weakref.finalize(instance, self._instance_map.pop, obj_id, None)
+                # on 3.7 this is type error, above it's not... but mypy yells about
+                # type ignore on 3.8+, so we do this funny business instead.
+                args = (instance, self._instance_map.pop, obj_id, None)
+                weakref.finalize(*args)  # type: ignore
 
         return self._instance_map[obj_id]