app.py

import gradio as gr
import io

# Genera un BytesIO con el texto y retorna (BytesIO, nombre)
def return_bytesio(text):
    file_bytes = io.BytesIO()
    file_bytes.write(text.encode("utf-8"))
    file_bytes.seek(0)
    return (file_bytes, "output.txt")

with gr.Blocks() as demo:
    gr.Markdown("## 📥 Simple Download Demo")

    text_input = gr.Textbox(label="Escribe una palabra", placeholder="Ingresa algo...")
    file_output = gr.File(label="Descargar Archivo")
    download_btn = gr.Button("Generar & Descargar")

    download_btn.click(
        return_bytesio,
        inputs=text_input,
        outputs=file_output,
    )

if __name__ == "__main__":
    demo.launch()