app.py

import gradio as gr

with gr.Blocks() as demo:
    gr.Markdown("# Image Display Demo")
    with gr.Row():
        with gr.Column():
            img_input = gr.Image(type="pil", label="Upload Image")
        with gr.Column():
            img_output = gr.Image(label="Output Image")
    
    img_input.change(
        fn=lambda x: x,
        inputs=img_input,
        outputs=img_output
    )

demo.launch()