Update app.py

app.py

@@ -14,7 +14,7 @@ with gr.Blocks() as myApp:
     with gr.Row():
         with gr.Column(scale=1):
             inp = gr.Radio(choices=list(range(10)),label='เลือก 1 หมายเลข')
-            btn = Button(value="เฉลย")
+            btn = gr.Button(value="เฉลย")
         with gr.Column(scale=1):
             out = gr.Textbox(label='ผลลัพธ์')
         inp.change(guess,inp,out)