Update app.py

app.py

@@ -31,6 +31,7 @@ if torch.cuda.is_available():
     tokenizer = AutoTokenizer.from_pretrained(model_id)
     tokenizer.use_default_system_prompt = False
 
+chatbot=gr.Chatbot(height=650, placeholder=PLACEHOLDER, label='Gradio ChatInterface')
 
 @spaces.GPU
 def generate(