Mypy fix

ianthomas23 · ianthomas23 · commit 2106501d23de · 2025-08-04T16:12:37.000+01:00
diff --git a/ipykernel/kernelbase.py b/ipykernel/kernelbase.py
@@ -247,7 +247,7 @@ def _parent_header(self):
     execution_count = 0
 
     # Asyncio lock to ensure only one control queue message is processed at a time.
-    _control_lock = asyncio.Lock
+    _control_lock = Instance(asyncio.Lock)
 
     msg_types = [
         "execute_request",
