Update app.py

app.py

@@ -1,15 +1,24 @@
+import os
+
+# 👇 Fix for Hugging Face permissions
+os.environ['NLTK_DATA'] = '/tmp/nltk_data'
+import nltk
+nltk.data.path.append('/tmp/nltk_data')
+nltk.download("punkt", download_dir="/tmp/nltk_data", quiet=True)
+nltk.download("averaged_perceptron_tagger", download_dir="/tmp/nltk_data", quiet=True)
+
 import langchain
 import streamlit as st
 import pickle as pkl
 from langchain.chains import RetrievalQAWithSourcesChain
-from langchain.document_loaders import UnstructuredURLLoader
+from langchain_community.document_loaders import UnstructuredURLLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.embeddings import SentenceTransformerEmbeddings
-from langchain.vectorstores import Chroma, FAISS
+from langchain_community.embeddings import SentenceTransformerEmbeddings
+from langchain_community.vectorstores import Chroma, FAISS
 from langchain_openai import ChatOpenAI
 from dotenv import load_dotenv
 import time
-import os 
+
 
 load_dotenv("ping.env")
 api_key=os.getenv("OPENAI_API_KEY")