diff --git a/pytorch_lightning/core/lightning.py b/pytorch_lightning/core/lightning.py
index 2e8b634d..dc4aabdc 100644
--- a/pytorch_lightning/core/lightning.py
+++ b/pytorch_lightning/core/lightning.py
@@ -5,6 +5,7 @@ import warnings
 from abc import ABC, abstractmethod
 from argparse import Namespace
 
+
 import pandas as pd
 import torch
 import torch.distributed as dist