Update app.py

app.py

@@ -1,15 +1,19 @@
 import streamlit as st
-from langchain.text_splitter import RecursiveCharacterTextSplitter
-from langchain.embeddings import OpenAIEmbeddings
-from langchain.vectorstores import FAISS
+from dotenv import load_dotenv
+from PyPDF2 import PdfReader
+from langchain.text_splitter import CharacterTextSplitter, RecursiveCharacterTextSplitter
+from langchain.embeddings import OpenAIEmbeddings, HuggingFaceInstructEmbeddings
+from langchain.vectorstores import FAISS, Chroma
+from langchain.embeddings import HuggingFaceEmbeddings  # General embeddings from HuggingFace models.
 from langchain.chat_models import ChatOpenAI
 from langchain.memory import ConversationBufferMemory
 from langchain.chains import ConversationalRetrievalChain
-from langchain.document_loaders import PyPDFLoader
-import tempfile
+from htmlTemplates import css, bot_template, user_template
+from langchain.llms import HuggingFaceHub, LlamaCpp, CTransformers  # For loading transformer models.
+from langchain.document_loaders import PyPDFLoader, TextLoader, JSONLoader, CSVLoader
+import tempfile # 임시 파일을 생성하기 위한 라이브러리입니다.
 import os
 
-
 # PDF 문서로부터 텍스트를 추출하는 함수입니다.
 def get_pdf_text(pdf_docs):
     temp_dir = tempfile.TemporaryDirectory()