RH pointed out that discard(element) doesn't do the transformation on

the element if necessary.  Fixed by calling self.remove(element).

diff --git a/Lib/sets.py b/Lib/sets.py
index fee06d76be0dc717af24cf33a6fba0d2aa616314..c391545d4e43a7bf7c1a74445e3addcb3b85875f 100644 (file)
--- a/Lib/sets.py
+++ b/Lib/sets.py
@@ -450,7 +450,7 @@ class Set(BaseSet):
         If the element is not a member, do nothing.
         """
         try:
-            del self._data[element]
+            self.remove(element)
         except KeyError:
             pass