Update app.py

app.py

@@ -1,5 +1,9 @@
 import streamlit as st
 import os
+
+os.system("pip uninstall -y pydantic")
+os.system('pip install pydantic==1.8.2 --use-deprecated=legacy-resolver')
+
 import re
 import json
 from dotenv import load_dotenv
@@ -12,8 +16,7 @@ from haystack.nodes import EmbeddingRetriever
 import openai
 
 
-os.system("pip uninstall -y pydantic")
-os.system('pip install pydantic==1.8.2 --use-deprecated=legacy-resolver')
+
 
 # for local st testing, may need to run source ~/.zshrc to point to env vars