Fix sorting of imports

app/main/views/notifications.py

@@ -1,8 +1,8 @@
 # -*- coding: utf-8 -*-
 import base64
+import os
 from datetime import datetime
 
-import os
 from flask import (
     Response,
     abort,
@@ -13,8 +13,8 @@ from flask import (
     url_for,
 )
 from flask_login import login_required
-
 from notifications_python_client.errors import APIError
+
 from app import (
     current_service,
     format_date_numeric,