Update app.py

app.py

@@ -197,8 +197,10 @@ with gr.Blocks() as iface:
     msg = gr.Textbox()
     with gr.Row():
         submit_b = gr.Button()
+        stop_b = gr.Button("Stop")
         clear = gr.ClearButton([msg, chatbot])
-    submit_b.click(generate, [msg,chatbot],[msg,chatbot])
+    sub_b = submit_b.click(generate, [msg,chatbot],[msg,chatbot])
+    stop_b.click(None,None,None).cancels([sub_b])
     msg.submit(generate, [msg, chatbot], [msg, chatbot])
 iface.launch()
 '''