diff --git a/deepmd/utils/data_system.py b/deepmd/utils/data_system.py
index 4f29a71ba2..90b600548f 100644
--- a/deepmd/utils/data_system.py
+++ b/deepmd/utils/data_system.py
@@ -27,12 +27,12 @@
 from deepmd.utils.data import (
     DeepmdData,
 )
-from deepmd.utils.path import (
-    DPPath,
-)
 from deepmd.utils.out_stat import (
     compute_stats_from_redu,
 )
+from deepmd.utils.path import (
+    DPPath,
+)
 
 log = logging.getLogger(__name__)