commit f8de3fea1280d55377d40c6e04b64114f9da2fa6
author Georg Brandl <georg@python.org> Fri Dec 03 07:55:44 2010 +0000
committer Georg Brandl <georg@python.org> Fri Dec 03 07:55:44 2010 +0000
tree bf723ad86ffcf6bdc2550fe6304fd384d9445e08
parent 3b9406b08aad04c1f92d7a2ab03c8a42c3afb8be

#10360: catch TypeError in WeakSet.__contains__, just like WeakKeyDictionary does.

Lib/_weakrefset.py

diff --git a/Lib/_weakrefset.py b/Lib/_weakrefset.py
index 3de3bda..4265369 100644
--- a/Lib/_weakrefset.py
+++ b/Lib/_weakrefset.py
@@ -66,7 +66,11 @@
         return sum(x() is not None for x in self.data)
 
     def __contains__(self, item):
-        return ref(item) in self.data
+        try:
+            wr = ref(item)
+        except TypeError:
+            return False
+        return wr in self.data
 
     def __reduce__(self):
         return (self.__class__, (list(self),),