try to fix bug

horizon-metrics.py

@@ -178,15 +178,15 @@ class HorizonMetrics(evaluate.Metric):
         """
         # this means that the metric was called using the input field on huggingface website
 
-        print(np.asarray(predictions).shape)
-        print(np.asarray(references).shape)
-
         if (self.ground_truth_det is None or self.predictions is None):
             self.ground_truth_det = references[0]
             self.predictions = predictions[0]
             print(self.ground_truth_det)
             print(self.predictions)
 
+        print(np.asarray(self.ground_truth_det).shape)
+        print(np.asarray(self.predictions).shape)
+
         # calculate erros and store values in slope_error_list and midpoint_error_list
         for annotated_horizon, proposed_horizon in zip(self.ground_truth_det,
                                                        self.predictions):