Update app.py

app.py

@@ -118,7 +118,7 @@ def stop_generation_func():
 with gr.Blocks(theme='gradio/monochrome') as demo:
     with gr.Row():
         with gr.Column(scale=2):
-            chatbot = gr.Chatbot()
+            chatbot = gr.Chatbot(value=[])
             msg = gr.Textbox(label="Message")
             with gr.Row():
                 clear = gr.Button("Clear")
@@ -143,10 +143,14 @@ with gr.Blocks(theme='gradio/monochrome') as demo:
 
     def user(user_message, history):
         print(f"{get_timestamp()} <|user|> {user_message}")
+        history = history or []
         return "", history + [[user_message, None]]
 
     def bot(history, system_prompt, temperature, top_p, top_k, frequency_penalty, presence_penalty, repetition_penalty, max_tokens):
         global stop_generation
+        history = history or []
+        if not history:
+            return history
         user_message = history[-1][0]
         bot_message = predict(user_message, history[:-1], system_prompt, temperature, top_p, top_k, frequency_penalty, presence_penalty, repetition_penalty, max_tokens)
         history[-1][1] = ""
@@ -156,7 +160,7 @@ with gr.Blocks(theme='gradio/monochrome') as demo:
                 break
             history[-1][1] = chunk
             yield history
-        stop_generation.clear()  
+        stop_generation.clear()
 
     def regenerate_response(history, system_prompt, temperature, top_p, top_k, frequency_penalty, presence_penalty, repetition_penalty, max_tokens):
         if len(history) > 0: