SF patch 564549 (Erik Andersén).

The WeakKeyDictionary constructor didn't work when a dict arg was
given.  Fixed by moving a line.  Also adding a unit test.

Bugfix candidate.

Lib/test/test_weakref.py

@@ -391,6 +391,17 @@ class MappingTestCase(TestBase):
             values.remove(v)
         self.assert_(len(values) == 0, "itervalues() did not touch all values")
 
+    def test_make_weak_keyed_dict_from_dict(self):
+        o = Object(3)
+        dict = weakref.WeakKeyDictionary({o:364})
+        self.assert_(dict[o] == 364)
+
+    def test_make_weak_keyed_dict_from_weak_keyed_dict(self):
+        o = Object(3)
+        dict = weakref.WeakKeyDictionary({o:364})
+        dict2 = weakref.WeakKeyDictionary(dict)
+        self.assert_(dict[o] == 364)
+
     def make_weak_keyed_dict(self):
         dict = weakref.WeakKeyDictionary()
         objects = map(Object, range(self.COUNT))

Lib/weakref.py

@@ -144,12 +144,12 @@ class WeakKeyDictionary(UserDict.UserDict):
 
     def __init__(self, dict=None):
         self.data = {}
-        if dict is not None: self.update(dict)
         def remove(k, selfref=ref(self)):
             self = selfref()
             if self is not None:
                 del self.data[k]
         self._remove = remove
+        if dict is not None: self.update(dict)
 
     def __delitem__(self, key):
         for ref in self.data.iterkeys():

Misc/ACKS

@@ -16,6 +16,7 @@ Jyrki Alakuijala
 Billy G. Allie
 Mark Anacker
 Anders Andersen
+Erik Andersén
 Oliver Andrich
 Ross Andrus
 Jason Asbahr