diff --git a/dygraph/train.py b/dygraph/train.py
index fc77c71da8114d07c2bed9337c87f54a55b80a7e..f8e5a56377b18b7fc112e7b7a0e546f42a5c2d48 100644
--- a/dygraph/train.py
+++ b/dygraph/train.py
@@ -19,7 +19,7 @@ from paddle.distributed import ParallelEnv
 
 import paddleseg
 from paddleseg.cvlibs import manager, Config
-from paddleseg.utils import get_environ_info, logger, 
+from paddleseg.utils import get_environ_info, logger
 from paddleseg.core import train