Update app.py

app.py

@@ -5,6 +5,30 @@ import os, sys, json
 import gradio as gr
 from langchain.evaluation import load_evaluator
 from pprint import pprint as print
+import time
+
+from langchain.chains import LLMChain, RetrievalQA
+from langchain.chat_models import ChatOpenAI
+from langchain.document_loaders import PyPDFLoader, WebBaseLoader, UnstructuredWordDocumentLoader, DirectoryLoader
+from langchain.document_loaders.blob_loaders.youtube_audio import YoutubeAudioLoader
+from langchain.document_loaders.generic import GenericLoader
+from langchain.document_loaders.parsers import OpenAIWhisperParser
+from langchain.schema import AIMessage, HumanMessage
+from langchain.llms import HuggingFaceHub
+from langchain.llms import HuggingFaceTextGenInference
+from langchain.embeddings import HuggingFaceInstructEmbeddings, HuggingFaceEmbeddings, HuggingFaceBgeEmbeddings, HuggingFaceInferenceAPIEmbeddings
+
+from langchain.embeddings.openai import OpenAIEmbeddings
+from langchain.prompts import PromptTemplate
+from langchain.text_splitter import RecursiveCharacterTextSplitter
+from langchain.vectorstores import Chroma
+from chromadb.errors import InvalidDimensionException
+
+#from langchain.vectorstores import MongoDBAtlasVectorSearch
+#from pymongo import MongoClient
+
+from dotenv import load_dotenv, find_dotenv
+_ = load_dotenv(find_dotenv())
 
 
 # access token with permission to access the model and PRO subscription