add prints to find bug

horizon-metrics.py

@@ -179,6 +179,8 @@ class HorizonMetrics(evaluate.Metric):
         if (self.ground_truth_det is None or self.predictions is None):
             self.ground_truth_det = references
             self.predictions = predictions
+            print(self.ground_truth_det)
+            print(self.predictions)
 
         # calculate erros and store values in slope_error_list and midpoint_error_list
         for annotated_horizon, proposed_horizon in zip(self.ground_truth_det,
@@ -186,7 +188,8 @@ class HorizonMetrics(evaluate.Metric):
 
             if annotated_horizon is None or proposed_horizon is None:
                 continue
-
+            print("annotated:", annotated_horizon)
+            print("proposed:", proposed_horizon)
             slope_error, midpoint_error = calculate_horizon_error(
                 annotated_horizon, proposed_horizon)
             self.slope_error_list.append(slope_error)