ModuleNotFoundError: No module named 'mmcv._ext'

See original GitHub issue

I tried all possible way explained in this thread. Still i am getting same error. Here are specs i am working on: OS: Windows 10 ±----------------------------------------------------------------------------+ | NVIDIA-SMI 496.49 Driver Version: 496.49 CUDA Version: 11.5 | |-------------------------------±---------------------±---------------------+

Torch-1.11.0+cu115 torch.cuda.is_available()) - True Torchvision - 0.12.0+cu115 mmdet.version - 2.22.0

ModuleNotFoundError: No module named 'mmcv._ext'

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State:
Created 2 years ago
Comments:16 (8 by maintainers)

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gaotongxiaocommented, Mar 15, 2022

Thanks for the detailed log. It’s probably because of the wrongly cached mmcv-full

Collecting mmcv-full
  Using cached mmcv_full-1.4.6-py2.py3-none-any.whl

Make sure you have cleared the cache before installing mmcv-full:

pip cache dir  # to get the path to the pip cache
rmdir PATH_TO_PIP_CACHE
pip uninstall mmcv-full
pip install mmcv-full -f https://download.openmmlab.com/mmcv/dist/cu113/torch1.10.0/index.html

1reaction

gaotongxiaocommented, Mar 15, 2022

Seems like a scipy’s feature that imports MMOCR twice. You can try disabling it https://stackoverflow.com/questions/46485628/avoid-reloaded-modules-module-name-message-in-python

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