diff --git a/sugar/datastore/datastore.py b/sugar/datastore/datastore.py
index 0c2379d3..a5ac3d0e 100644
--- a/sugar/datastore/datastore.py
+++ b/sugar/datastore/datastore.py
@@ -60,8 +60,14 @@ class DSMetadata(gobject.GObject):
     def __delitem__(self, key):
         del self._props[key]
 
+    def __contains__(self, key):
+        return self._props.__contains__(key)
+    
     def has_key(self, key):
         return self._props.has_key(key)
+
+    def keys(self):
+        return self._props.keys()
     
     def get_dictionary(self):
         return self._props