app.py

import os
import gradio as gr

def sum(a, b):
    return str(float(a) + float(b))

with gr.Blocks() as demo:
    input_a = gr.Textbox(label = 'Value 1', value = '0')
    input_b = gr.Textbox(label = 'Value 2', value = '0')
    result_box = gr.Textbox(label = 'Result', value = '0')
    button_go = gr.Button(value = 'GO')
    button_go.click(fn=sum, inputs = [input_a, input_b], outputs = result_box)
demo.launch(share = True)