Avoid equality check on Watcher (#612)

holoviz · Mar 31, 2022 · 9bce415 · 9bce415
1 parent becf81b
commit 9bce415
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/param/parameterized.py b/param/parameterized.py
@@ -2031,7 +2031,7 @@ def _call_watcher(self_, watcher, event):
 
         if self_.self_or_cls.param._BATCH_WATCH:
             self_._events.append(event)
-            if watcher not in self_._watchers:
+            if not any(watcher is w for w in self_._watchers):
                 self_._watchers.append(watcher)
         else:
             event = self_._update_event_type(watcher, event, self_.self_or_cls.param._TRIGGER)