app.py

import gradio as gr

# Used in gradio unit test

with gr.Blocks() as demo:
    with gr.Row():
        with gr.Column():
            num = gr.Number()
            minus_one_btn = gr.Button(value="minus one")
            double_btn = gr.Button(value="double")
        with gr.Column():
            minus_one = gr.Number()
            double = gr.Number()
    minus_one_btn.click(lambda s: s - 1, num, minus_one, api_name="minus_one")
    double_btn.click(lambda s: s * 2, num, double, api_name="double")

demo.launch()