Update app.py

app.py

@@ -19,7 +19,7 @@ file_path = 'response_metropol.json'
 data = pd.read_json(file_path)
 data.head()
 documents = [Document(text=row['values'],metadata={"filename": row['file_name'], "description":row['file_description']},) for index, row in data.iterrows()]
-os.environ["OPENAI_API_KEY"] = os.getenv(api_key_openai)
+os.environ["OPENAI_API_KEY"] = os.getenv('api_key_openai')
 #pd.set_option("display.max_colwidth", -1)
 # build index
 index = VectorStoreIndex.from_documents(documents)