Update ref-metrics.py

ref-metrics.py

@@ -99,7 +99,7 @@ class UserFriendlyMetrics(evaluate.Metric):
     ):
         """Returns the scores"""
         # TODO: Compute the different scores of the module
-        return dummy_values()
+        return self.dummy_values()
         # return calculate(predictions, references, max_iou)
 
     def dummy_values():