Update app.py

app.py

@@ -2,6 +2,7 @@
 import gradio as gr
 from langchain_community.vectorstores import FAISS
 from langchain_community.embeddings import HuggingFaceEmbeddings
+from transformers import MarianMTModel, MarianTokenizer
 from openai import OpenAI
 import os
 import zipfile