diff --git a/mmrazor/models/mutables/derived_mutable.py b/mmrazor/models/mutables/derived_mutable.py
index 51abed7a6..9a4454c0e 100644
--- a/mmrazor/models/mutables/derived_mutable.py
+++ b/mmrazor/models/mutables/derived_mutable.py
@@ -8,8 +8,7 @@
 
 import inspect
 import logging
-from collections.abc import Iterable
-from typing import Any, Callable, Dict, Optional, Set, Union
+from typing import Any, Callable, Dict, Iterable, Optional, Set, Union
 
 import torch
 from mmengine.logging import print_log