Update app.py

app.py

@@ -14,7 +14,8 @@ from langchain.indexes import VectorstoreIndexCreator #vectorize db index with c
 from langchain.text_splitter import CharacterTextSplitter #text splitter
 from langchain.chains import RetrievalQA
 from langchain.document_loaders import UnstructuredPDFLoader  #load pdf
-from langchain.agents import create_pandas_dataframe_agent
+# from langchain.agents import create_pandas_dataframe_agent
+from langchain_experimental.agents import create_pandas_dataframe_agent
 
 import pandas as pd
 import numpy as np