app.py

import gradio as gr
import pdfminer

def read_pdf(file)
    from pdfminer.high_level import extract_text
    text = extract_text(file.name)
    return text

iface = gr.Interface(
    read_pdf,
    gr.inputs.FileUpload(is_single=True, allow_pdf=True),
    gr.outputs.Textbox()
)
iface.launch()