import gradio as gr
import os
from langchain_community.document_loaders import PYPDFloader
from langchain.txt_sliter import recursiveCharacterTextSpliter
from langchain_community.vectorstores import chroma
from langchain.chains import ConversationalRetrievalChain
from langchain_community.embeddings import HuggingFaceEmbeddings
from langchain_community.llms import HuggingFacePipeline
from langchain.chains import ConversationalRetrievalChain
from langchain.memory import ConversationBufferMemory
from langchain_community.llms import HuggingFaceEdpoint
from pathlib import path
import chromadb
from unidecode import unidecode
from transformers import Auto Tokenizer
import transformers
import torch
import tqdm
import acceierate
import re
defacult_persist_directry=`./chroma_HF/`