Update app.py

app.py

@@ -44,6 +44,7 @@ from transformers import BitsAndBytesConfig
 import os
 from langchain.llms import CTransformers
 import streamlit as st
+from langchain.document_loaders.base import BaseLoader
 
 FILE_LOADER_MAPPING = {
     ".csv": (CSVLoader, {"encoding": "utf-8"}),