change import level

isc.py

@@ -32,8 +32,6 @@ import timm
 
 import warnings
 
-from .train_isc import train_isc
-
 warnings.filterwarnings('ignore')
 log = logging.getLogger('isc_op')
 
@@ -179,6 +177,7 @@ class Isc(NNOperator):
               train_dataset=None,
               eval_dataset=None,
               resume_checkpoint_path=None, **kwargs):
+        from .train_isc import train_isc
         training_args = kwargs.pop('training_args', None)
         train_isc(self._model, training_args)