import gradio as gr
import pdfminer
from pdfminer.high_level import extract_text
import urllib.request

def read_pdf(file, url):
    if url is not None and url != "":
        file = urllib.request.urlretrieve(url)[0]
    text = extract_text(file)
    return text

iface = gr.Interface(
    read_pdf,
    gr.inputs.File(examples='path/to/example_pdf_files'),
    gr.inputs.Textbox(label="Enter URL of pdf"),
    gr.outputs.Textbox()
)
iface.launch()