app.py

import gradio as gr

def esfera(raio,calculo):
 if (calculo=="perimetro"):
   return 2*raio*3.14

 if (calculo=="area"):
   return 3.14*raio**2

iface = gr.Interface(fn=esfera,
                    inputs=[gr.Slider(1, 20,1),
       gr.Dropdown(["perimetro", "area"])], outputs="number")
iface.launch(debug=True, share=True)