Update app.py

app.py

@@ -1,12 +1,15 @@
 # import bs4
 from langchain_community.document_loaders import WebBaseLoader
+from langchain_community.document_loaders import PyPDFLoader
+from langchain_community.llms import HuggingFaceEndpoint
 from langchain_core.runnables import RunnablePassthrough
 from langchain_text_splitters import RecursiveCharacterTextSplitter
+from langchain_core.output_parsers import StrOutputParser
 from langchain.embeddings import HuggingFaceEmbeddings
 from langchain.vectorstores import FAISS
-from langchain_community.llms import HuggingFaceEndpoint
+
 from langchain.prompts import PromptTemplate
-from langchain_community.document_loaders import PyPDFLoader
+
 import gradio as gr
 import os