Update app2.py

app2.py

@@ -7,7 +7,9 @@ from langchain_community.vectorstores import Chroma
 from langchain_google_genai import ChatGoogleGenerativeAI
 from langchain.chains.question_answering import load_qa_chain
 from langchain.prompts import PromptTemplate
-from streamlit_chromadb_connection.chromadb_connection import ChromadbConnection
+from langchain_community.document_loaders import PyPDFLoader
+from langchain_chroma import Chroma
+
 configuration = {
     "client": "PersistentClient",
     "path": "/tmp/.chroma"