Update app.py

app.py

@@ -114,19 +114,25 @@ with gr.Blocks() as demo:
             ],
             height=200,
         )
-
+        
     with gr.Row():
         with gr.Column(scale=2):
-            chatbot = gr.Chatbot([("Hello", "Hi")], label="Chatbot")
+            chatbot = gr.Chatbot(
+                value=[
+                    {"role": "user", "content": "Hello"},
+                    {"role": "assistant", "content": "Hi"}
+                ],
+                label="Chatbot"
+            )
             chat_btn = gr.Button("Add messages")
 
-            chat_btn.click(
-                lambda history: history
-                + [["How are you?", "I am good."]]
-                + (time.sleep(2) or []),
-                chatbot,
-                chatbot,
-            )
+            def add_messages(history):
+                time.sleep(2)
+                history.append({"role": "user", "content": "How are you?"})
+                history.append({"role": "assistant", "content": "I am good."})
+                return history
+
+            chat_btn.click(add_messages, chatbot, chatbot)
         with gr.Column(scale=1):
             with gr.Accordion("Advanced Settings"):
                 gr.Markdown("Hello")
@@ -137,3 +143,4 @@ with gr.Blocks() as demo:
 
 if __name__ == "__main__":
     demo.queue().launch(theme='rocketpal/apple-light')
+