Update app.py

app.py

@@ -213,13 +213,15 @@ with gr.Blocks(css=css) as demo:
             yield render_message(loading_message), loading_message, ""
 
             assistant_reply = ""
+            partial_history = history  
             for partial_reply in respond(message, api_key, max_tokens, top_p, temperature):
                 partial_history = history + [(message, partial_reply, "You", "P-ALPLE", sessions[api_key]["avatar"], ASSISTANT_PIC_PATH)]
                 yield render_message(partial_history), partial_history, ""
 
-            history, assistant_reply = partial_history, partial_reply
+            history, assistant_reply = partial_history, partial_reply if 'partial_reply' in locals() else ("", "")
             yield render_message(history), history, ""
-            
+
+        
         def regenerate_response(history, last_message, max_tokens, top_p, temperature):
             return "", []