conda list

conda remove opencv

pip uninstall opencv-python

conda list

pip 同时卸载两个库 

pip uninstall opencv-contrib-python opencv-python

没有and 直接写库名

module ‘cv2.dnn‘ has no attribute ‘DictValue‘解决办法_module 'cv2.dnn' has no attribute 'dictvalue-CSDN博客

AttributeError: module ‘cv2.dnn‘ has no attribute ‘DictValue‘_module 'cv2.dnn' has no attribute 'dictvalue-CSDN博客