Update app.py

app.py

@@ -135,7 +135,7 @@ def _launch_demo(args, model, tokenizer):
 
         if 'image' in query[0]:
             image = tokenizer.draw_bbox_on_latest_picture(response)
-               if image is not None:
+            if image is not None:
                 image_path = save_image(image)
                 _chatbot[-1] = (chat_query, (image_path,))
             else: