app.py

import gradio as gr
def txt_to_text(txt_file_cmpt):
    with open(txt_file_cmpt.name, 'r') as file:
        content = file.read()
    return content
with gr.Blocks() as demo:
    with gr.Row():
        with gr.Column(variant='panel', scale=1):
            txt_file_cmpt = gr.File(label="Select .txt File", file_count="single", file_types=[".txt"],
                                         height=150)
        with gr.Column(variant='panel', scale=4):
            with gr.Row():
                with gr.Column(variant='panel'):
                    text_tbox = gr.Textbox(label=".txt Text", interactive=True,
                                                    info="Upload .pdf or paste in text. Shift-Enter to add a line")
            txt_file_cmpt.change(txt_to_text, inputs=[txt_file_cmpt],
                                  outputs=[text_tbox])
demo.launch()