Create app.py

app.py

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+import gradio as gr
+import os
+
+from langchain.document_loaders import PyPDFLoader
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.vectorstores import Chroma
+from langchain.chains import ConversationalRetrievalChain
+from langchain.embeddings import HuggingFaceEmbeddings 
+from langchain.llms import HuggingFacePipeline
+from langchain.chains import ConversationChain
+from langchain.memory import ConversationBufferMemory
+from langchain.llms import HuggingFaceHub
+
+from pathlib import Path
+import chromadb
+
+from transformers import AutoTokenzier
+import transformers
+import torch
+import tqdm
+import accelerate
+