Ticket #4884: conf.diff

conf/__init__.py

@@ -37 +37 @@
             # __setattr__(), which would be an infinite loop.
             self.__dict__['_target'] = value
         else:
+            if self._target is None:
+                self._import_settings()
             setattr(self._target, name, value)
 
     def _import_settings(self):