Update app.py

app.py

@@ -9,8 +9,6 @@ from threading import Lock
 from langchain.vectorstores.faiss import FAISS
 from langchain.embeddings import OpenAIEmbeddings
 
-embeddings = OpenAIEmbeddings()
-vectorstore = FAISS.load_local('saved_model/vector.db',embeddings)
 
 def set_openai_api_key(api_key: str):
     """Set the api key and return chain.
@@ -19,6 +17,8 @@ def set_openai_api_key(api_key: str):
     if api_key:
         os.environ["OPENAI_API_KEY"] = api_key
         chain = get_chain(vectorstore)
+        embeddings = OpenAIEmbeddings()
+        vectorstore = FAISS.load_local('saved_model/vector.db',embeddings)
         os.environ["OPENAI_API_KEY"] = ""
         return chain