API refactor

venv/lib/python3.12/site-packages/celery/app/control.py

@@ -360,7 +360,7 @@ class Inspect:
                 * ``routing_key`` - Routing key used when task was published
                 * ``priority`` - Priority used when task was published
                 * ``redelivered`` - True if the task was redelivered
-            * ``worker_pid`` - PID of worker processin the task
+            * ``worker_pid`` - PID of worker processing the task
 
         """
         # signature used be unary: query_task(ids=[id1, id2])
@@ -527,7 +527,8 @@ class Control:
         if result:
             for host in result:
                 for response in host.values():
-                    task_ids.update(response['ok'])
+                    if isinstance(response['ok'], set):
+                        task_ids.update(response['ok'])
 
         if task_ids:
             return self.revoke(list(task_ids), destination=destination, terminate=terminate, signal=signal, **kwargs)