Update app.py

app.py

@@ -223,7 +223,6 @@ def _launch_demo(args):
         response_text = []
         for response in responses:
             response = response.choices[0].delta.content
-            response_text = []
             for ele in response:
                 response_text.append(ele)
             _chatbot[-1] = (_parse_text(chat_query), _remove_image_special(''.join(response_text)))