ModuleNotFoundError: No module named 'mmcv.transforms'

[yeouyang326]

I want to build a model using the Python API:
from mmseg.apis import init_segmentor
model = init_segmentor(config_file, checkpoint_file, device='cuda:0')
But I received a bug:
ModuleNotFoundError: No module named 'mmcv.transforms'
And I have tried:
pip uninstall mmcv
pip install "mmcv>=2.0.0rc1"
(but when I import mmcv
print(mmcv.version) mmcv's version was still 1.7.1, instead 2.1.0)
What should I modify?Thanks!!!!!