try to fix bug

horizon-metrics.py

@@ -183,9 +183,13 @@ class HorizonMetrics(evaluate.Metric):
             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)
+        try:
+             print(np.asarray(self.ground_truth_det).shape)
+            print(np.asarray(self.predictions).shape)
+        except:
+            # no nothing
+            pass
+       
 
         # calculate erros and store values in slope_error_list and midpoint_error_list
         for annotated_horizon, proposed_horizon in zip(self.ground_truth_det,