Update app.py

app.py

@@ -59,3 +59,6 @@ with gr.Blocks(css=css) as demo:
         txt = gr.Textbox(show_label=False, placeholder="在此输入文本并按回车键")
 
     txt.submit(answer, inputs=[txt, state], outputs=[chatbot, state])
+
+# 启动Gradio应用
+demo.launch()