Update app.py

app.py

@@ -34,7 +34,7 @@ if not torch.cuda.is_available():
     
 predictor = DefaultPredictor(cfg)
 my_metadata = MetadataCatalog.get("car_parts_dataset_val")
-my_metadata..thing_classes = ['_background_',
+my_metadata.thing_classes = ['_background_',
  'back_bumper',
  'back_glass',
  'back_left_door',