Update app.py

app.py

@@ -6,14 +6,15 @@ import pickle
 import gradio as gr
 from query_data import get_chain
 
-with open("vectorstore.pkl", "rb") as f:
-    vectorstore = pickle.load(f)
+
 
 class ChatWrapper:
     def __init__(self):
         self.lock = Lock()
 
     def set_openai_api_key(self, api_key: str):
+        with open("vectorstore.pkl", "rb") as f:
+            vectorstore = pickle.load(f)
         """Set the api key and return chain.
         If no api_key, then None is returned.
         """