Update app.py

app.py

@@ -1,6 +1,8 @@
 import base64
 import os
 from dotenv import load_dotenv
+import openai
+from langchain.embeddings.openai import OpenAIEmbeddings
 import streamlit as st
 from langchain.chains import RetrievalQA
 from langchain.document_loaders import PDFMinerLoader
@@ -13,6 +15,7 @@ from transformers import AutoModelForSeq2SeqLM, AutoTokenizer, pipeline
 import torch
 
 st.set_page_config(layout="wide")
+load_dotenv()
 
 def process_answer(instruction, qa_chain):
     response = ''