Update app.py

app.py

@@ -9,6 +9,8 @@ import gradio as gr
 from langchain.embeddings.openai import OpenAIEmbeddings
 from io import StringIO
 
+openai.api_key = os.getenv("OPENAI_API_KEY")
+
 def create_and_save_faiss_index(questions, embedding_model, index_file, embedding_file):
     question_embeddings = embedding_model.embed_documents(questions)
     faiss_index = faiss.IndexFlatL2(len(question_embeddings[0]))