app.py

import gradio as gr
import subprocess



def fn(txt):
    v = ""
    command = ["python", "-u", "script.py"]
    process = subprocess.Popen(
        command,
        stdout=subprocess.PIPE,
        stderr=subprocess.STDOUT,
        universal_newlines=True,
    )

    if process.stdout is None:
        raise ValueError("stdout is None")

    for line in process.stdout:
        v += line
        yield v

    process.stdout.close()
    return_code = process.wait()
    if return_code:
        raise subprocess.CalledProcessError(return_code, command)


with gr.Blocks() as demo:
    txt = gr.Code(show_label=False)
    demo.load(fn, inputs=txt, outputs=txt)

demo.launch()