Update space

app.py

@@ -72,14 +72,21 @@ def extract_table(url):
     except Exception as e:
         return f"<p>Error: {str(e)}</p>"
 
-def handle_prepare(index, chatbot):
+def handle_prepare(index, history):
     if 0 <= index < len(data):
         topic = data[index]["Topic"]
         prompt = f"Prepare a 10-minute reading on what I should know before the class for the topic: {topic}"
-        history = chatbot.value if chatbot.value else []
+        history = history if history else []
         history.append((prompt, None))
         return history
 
+def user_message(message, history, system_msg):
+    if message:
+        history = history or []
+        history.append((message, None))
+        return "", history
+    return "", history
+
 # Gradio App
 with gr.Blocks() as demo:
     with gr.Row():
@@ -109,12 +116,16 @@ with gr.Blocks() as demo:
             def clear_chat():
                 return [], []
 
-            def chat(message, history, system_msg):
-                return "", history + [[message, None]]
-
-            submit.click(chat, [msg, chatbot, system_message], [msg, chatbot]).then(
-                respond, [chatbot.value[-1][0], chatbot.value, system_message], chatbot
+            submit.click(
+                user_message,
+                inputs=[msg, chatbot, system_message],
+                outputs=[msg, chatbot]
+            ).then(
+                respond,
+                inputs=[lambda x: x[-1][0] if x else "", chatbot, system_message],
+                outputs=[chatbot]
             )
+            
             clear.click(clear_chat, None, [chatbot, msg])
 
             def update_buttons():
@@ -129,11 +140,11 @@ with gr.Blocks() as demo:
                         ).then(
                             respond,
                             inputs=[
-                                lambda: f"Prepare a 10-minute reading for: {row['Topic']}",
-                                lambda: chatbot.value,
+                                lambda: f"Prepare a 10-minute reading for: {data[i]['Topic']}",
+                                lambda x: x if x else [],
                                 system_message
                             ],
-                            outputs=chatbot
+                            outputs=[chatbot]
                         )
 
             extract_btn.click(