From b663a2ccbdd9bbd9a13f0cea743af709c53ec0c1 Mon Sep 17 00:00:00 2001
From: Fred Drake <fdrake@acm.org>
Date: Thu, 6 Sep 2001 14:51:01 +0000
Subject: Add __delitem__() support for WeakKeyDictionary. This closes SF bug
 #458860.

---
 Lib/weakref.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Lib/weakref.py b/Lib/weakref.py
index 1d21e79..c71d04b 100644
--- a/Lib/weakref.py
+++ b/Lib/weakref.py
@@ -146,6 +146,13 @@ class WeakKeyDictionary(UserDict.UserDict):
             del data[k]
         self._remove = remove
 
+    def __delitem__(self, key):
+        for ref in self.data.iterkeys():
+            o = ref()
+            if o == key:
+                del self.data[ref]
+                return
+
     def __getitem__(self, key):
         return self.data[ref(key)]
 
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