app.py

import gradio as gr


def greet(name):
    return "Hello " + name + "!"


with gr.Blocks() as blocks:
    with gr.Row():
        text_in = gr.Text()
        text_out = gr.Text()
    btn = gr.Button("Run") 
    btn.click(fn=greet, inputs=text_in, outputs=text_out)

blocks.launch()