updated

app.py

@@ -4,6 +4,7 @@ from langchain.vectorstores import Chroma
 from langchain.llms import HuggingFacePipeline
 from langchain.chains import RetrievalQA
 from transformers import AutoConfig, AutoTokenizer, pipeline, AutoModelForCausalLM
+from langchain_community.document_loaders import DirectoryLoader
 import torch
 import re
 import transformers