Update app.py

app.py

@@ -25,10 +25,12 @@ def user(message, history):
 def regenerate(history, system_msg, max_tokens, temperature, top_p, top_k, repetition_penalty):
     # Remove the last item from the history
     if history:
-        history.pop(-1)
+        del history[-1]
     
     # Re-execute the chat function
-    return chat(history, system_msg, max_tokens, temperature, top_p, top_k, repetition_penalty)
+    new_history, _, _ = chat(history, system_msg, max_tokens, temperature, top_p, top_k, repetition_penalty)
+    return new_history, new_history, ""
+
 
 def chat(history, system_message, max_tokens, temperature, top_p, top_k, repetition_penalty):
     history = history or []
@@ -133,5 +135,6 @@ with gr.Blocks() as demo:
     )
 
 
+
 demo.queue(max_size=128, concurrency_count=2)
 demo.launch()