diff --git a/deepmd/pt/utils/dataloader.py b/deepmd/pt/utils/dataloader.py
index a46df3fe4a..961a8ed9c4 100644
--- a/deepmd/pt/utils/dataloader.py
+++ b/deepmd/pt/utils/dataloader.py
@@ -92,6 +92,7 @@ def construct_dataset(system):
                 system=system,
                 type_map=type_map,
             )
+
         self.systems: list[DeepmdDataSetForLoader] = []
         global_rank = dist.get_rank() if dist.is_initialized() else 0
         if global_rank == 0: