Update app.py

app.py

@@ -3,7 +3,7 @@ import sys
 import gradio as gr
 from llama_index import GPTVectorStoreIndex, SimpleDirectoryReader, ServiceContext
 from llama_index import OpenAIEmbedding
-
+import os
 logging.basicConfig(stream=sys.stdout, level=logging.INFO)
 logging.getLogger().addHandler(logging.StreamHandler(stream=sys.stdout))
 os.environ["OPENAI_API_KEY"] = os.getenv("OPENAI_API_KEY")