app.py

import gradio as gr
from gradio_imageslider import ImageSlider
import time

def compare(input1, input2):

    print("Comparing...")
    time.sleep(1)
    return input1, input2

iface = gr.Interface(fn=compare, inputs=[gr.Image(), gr.Image()], outputs=ImageSlider(position=0.5, label='Comparación de 2 imágenes'))
iface.launch()