app.py

import gradio as gr

def add(a, b):
    return a + b

demo = gr.Interface(
    fn=add,
    inputs=[gr.Number(label="a"), gr.Number(label="b")],
    outputs=gr.Number(label="a + b"),
    title="Simple Addition",
    description="Add two numbers together",
)

if __name__ == "__main__":
    demo.launch()