Update app.py

app.py

@@ -4,7 +4,7 @@ import gradio as gr
 from transformers import AutoModelForSeq2SeqLM, AutoTokenizer, pipeline
 from langchain_chroma import Chroma
 from langchain_huggingface import HuggingFaceEmbeddings, HuggingFacePipeline
-from langchain.document_loaders import PyPDFLoader
+from langchain_community.document_loaders import PyPDFLoader
 from langchain.text_splitter import RecursiveCharacterTextSplitter
 from langchain.chains import create_retrieval_chain, LLMChain
 from langchain.prompts import PromptTemplate