newforms-admin: Merged to [4373]

git-svn-id: http://code.djangoproject.com/svn/django/branches/newforms-admin@4374 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/datastructures.py

@@ -81,6 +81,10 @@ class SortedDict(dict):
             self.keyOrder.append(key)
         return dict.setdefault(self, key, default)
 
+    def value_for_index(self, index):
+        "Returns the value of the item at the given zero-based index."
+        return self[self.keyOrder[index]]
+
 class MultiValueDictKeyError(KeyError):
     pass