change import library

app.py

@@ -20,13 +20,14 @@ import time
 from langchain.chains.question_answering import load_qa_chain
 from langchain.chains.conversational_retrieval.prompts import CONDENSE_QUESTION_PROMPT
 
-from langchain.document_loaders import TextLoader
-from langchain.document_loaders import PyPDFLoader
-from langchain.document_loaders import Docx2txtLoader
-from langchain.document_loaders.image import UnstructuredImageLoader
-from langchain.document_loaders import UnstructuredHTMLLoader
-from langchain.document_loaders import UnstructuredPowerPointLoader
-from langchain.document_loaders import TextLoader
+from langchain_community.document_loaders import TextLoader
+from langchain_community.document_loaders import PyPDFLoader
+# from langchain.document_loaders import PyPDFLoader
+# from langchain.document_loaders import Docx2txtLoader
+# from langchain.document_loaders.image import UnstructuredImageLoader
+# from langchain.document_loaders import UnstructuredHTMLLoader
+# from langchain.document_loaders import UnstructuredPowerPointLoader
+# from langchain.document_loaders import TextLoader
 from langchain.memory import ConversationBufferWindowMemory
 
 from langchain.memory import ConversationBufferMemory