Fix load trainer issue

Signed-off-by: Kaiyuan Hu <kaiyuan.hu@zilliz.com>

isc.py

@@ -14,6 +14,7 @@
 
 import logging
 import os
+import warnings
 from typing import Union, List
 from pathlib import Path
 
@@ -22,6 +23,7 @@ from towhee.operator.base import NNOperator, OperatorFlag
 from towhee.types.arg import arg, to_image_color
 from towhee import register
 from towhee.models import isc
+import sys
 # from towhee.dc2 import accelerate
 
 import torch
@@ -30,10 +32,9 @@ from torchvision import transforms
 from PIL import Image as PILImage
 import timm
 
-import warnings
-
 warnings.filterwarnings('ignore')
 log = logging.getLogger('isc_op')
+_ = sys.modules[__name__]
 
 
 # @accelerate