changeset 3167:d0fb79f97466

quick frontends (app): added an "ignore_missing" argument to RemoveListener: normally an error is logged when removeListener is call on a inexisting listener, but sometimes listeners are added only in specific scenarios, and it may be handy to try to delete them without having to explictly check that they have been used.
author Goffi <>
date Wed, 12 Feb 2020 19:44:05 +0100
parents 122075ceaa53
children 1cb232c9e845
files sat_frontends/quick_frontend/
diffstat 1 files changed, 9 insertions(+), 5 deletions(-) [+]
line wrap: on
line diff
--- a/sat_frontends/quick_frontend/	Wed Feb 12 19:40:48 2020 +0100
+++ b/sat_frontends/quick_frontend/	Wed Feb 12 19:44:05 2020 +0100
@@ -581,18 +581,22 @@
         assert type_ in C.LISTENERS
         self._listeners.setdefault(type_, {})[callback] = profiles_filter
-    def removeListener(self, type_, callback):
+    def removeListener(self, type_, callback, ignore_missing=False):
         """Remove a callback from listeners
-        @param type_: same as for [addListener]
-        @param callback: callback to remove
+        @param type_(str): same as for [addListener]
+        @param callback(callable): callback to remove
+        @param ignore_missing(bool): if True, don't log error if the listener doesn't
+            exist
         assert type_ in C.LISTENERS
         except KeyError:
-            log.error(
-                f"Trying to remove an inexisting listener (type = {type_}): {callback}")
+            if not ignore_missing:
+                log.error(
+                    f"Trying to remove an inexisting listener (type = {type_}): "
+                    f"{callback}")
     def callListeners(self, type_, *args, **kwargs):
         """Call the methods which listen type_ event. If a profiles filter has