Add comment related to #1047

enthought · May 12, 2020 · 739eaa0 · 739eaa0
1 parent 3303684
commit 739eaa0
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/traits/observers/_trait_added_observer.py b/traits/observers/_trait_added_observer.py
@@ -211,6 +211,9 @@ def observer_change_handler(event, graph, handler, target, dispatcher):
             dispatcher=dispatcher,
             remove=False,
         )
+        # Added notifiers cannot be removed because the reverse action
+        # of ``add_trait`` does not fire a change event
+        # see enthought/traits#1047
 
     def iter_extra_graphs(self, graph):
         """ Yield new ObserverGraph to be contributed by this observer.