app.py

import os
from dotenv import load_dotenv

load_dotenv()

import gradio as gr

os.environ["OPENAI_API_TYPE"]=os.getenv("OPENAI_API_TYPE")
os.environ["OPENAI_API_VERSION"]=os.getenv("OPENAI_API_VERSION")
os.environ["OPENAI_API_BASE"]=os.getenv("OPENAI_API_BASE")
os.environ["OPENAI_API_KEY"]=os.getenv("OPENAI_API_KEY")
from pathlib import Path

from langchain.document_loaders import UnstructuredPDFLoader

def convert_PDF(pdf_obj):
    # Check if pdf_obj is a `list`
    if isinstance(pdf_obj, list):
        pdf_obj = pdf_obj[0]

    file_path = Path(pdf_obj.name)
    loader = UnstructuredPDFLoader(file_path)
    data = loader.load()

    return f'There are {len(data[0].page_content)} characters in your document'  

with gr.Blocks() as demo:
    # Declearing states
    uploadedFile = gr.State([])

    text_file = gr.File(
        label="Download Text File",
        file_count="single",
        type="file"
    )

    convert_button = gr.Button("Let your bot skim through this real quick...")
    text_output = gr.Textbox()

    convert_button.click(
        fn=convert_PDF,
        inputs=[text_file],
        outputs=[text_output],
    )

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