Exception: Not found: 'python/cv2/py.typed'
----------------------------------------
ERROR: Failed building wheel for opencv-python
Successfully built mmcv
Failed to build opencv-python
ERROR: Could not build wheels for opencv-python, which is required to install pyproject.toml-based projects
pip install mmcv-full==1.3.1 -f https://download.openmmlab.com/mmcv/dist/cu101/torch1.5.0/index.html