diff --git a/python/ray/util/sgd/torch/training_operator.py b/python/ray/util/sgd/torch/training_operator.py
index 873767dc1..8d275fe9c 100644
--- a/python/ray/util/sgd/torch/training_operator.py
+++ b/python/ray/util/sgd/torch/training_operator.py
@@ -22,6 +22,7 @@ try:
 except ImportError:
     pass
 
+
 def _is_multiple(component):
     """Checks if a component (optimizer, model, etc) is not singular."""
     return isinstance(component, collections.Iterable) and len(component) > 1