diff --git a/superset/views/base.py b/superset/views/base.py
index 013f9a7b4729..9ecdcf4fd949 100644
--- a/superset/views/base.py
+++ b/superset/views/base.py
@@ -179,7 +179,12 @@ def validate_json(form, field):  # noqa
 
 class DeleteMixin(object):
     @action(
-        "muldelete", __("Delete"), __("Delete all Really?"), "fa-trash", single=False)
+        "muldelete",
+        __("Delete"),
+        __("Delete all Really?"),
+        "fa-trash",
+        single=False
+    )
     def muldelete(self, items):
         self.datamodel.delete_all(items)
         self.update_redirect()