NameError: name 'task_cls' is not defined about qtool

[smurf-1119]

More details:
(STR) root@node03:~/data/qu/model-quantization# python tools.py --keyword update,raw --mf weights/det-resnet18/mf.txt --mt weights/det-resnet18/mt.txt --old weights/pytorch-resnet18/resnet18-5c106cde.pth --new weights
Failing to import plugin, ModuleNotFoundError("No module named 'plugin'",)
loading third party model failed cannot import name 'model_zoo'
Traceback (most recent call last):
File "tools.py", line 11, in
import main as entry
File "/root/data/qu/model-quantization/main.py", line 4, in
task_cls.py
NameError: name 'task_cls' is not defined