Added SortedDict.value_for_index() method in django.utils.datastructures

git-svn-id: http://code.djangoproject.com/svn/django/trunk@4373 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/utils/datastructures.py

@@ -70,7 +70,7 @@ class SortedDict(dict):
         return self.keyOrder[:]
 
     def values(self):
-        return [dict.__getitem__(self,k) for k in self.keyOrder]
+        return [dict.__getitem__(self, k) for k in self.keyOrder]
 
     def update(self, dict):
         for k, v in dict.items():
@@ -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