Update app.py

app.py

@@ -278,6 +278,7 @@ def clear_history(history):
 
 def add_message(history, message):
     global chat_image_num
+    print("#### len(history)",len(history))
     if not history:
         history = []
         our_chatbot = chat_manager.get_chatbot(args, model_path, tokenizer, model, image_processor, context_len)