遇到这种错误，分别执行：
pip uninstall opencv-python pip uninstall opencv-contrib-python pip install opencv-python pip install opencv-contrib-python
最好使用国内镜像，比如豆瓣：
pip install opencv-python -i http://pypi.douban.com/simple --trusted-host pypi.douban.com亲测有效
遇到这种错误，分别执行：
pip uninstall opencv-python pip uninstall opencv-contrib-python pip install opencv-python pip install opencv-contrib-python
最好使用国内镜像，比如豆瓣：
pip install opencv-python -i http://pypi.douban.com/simple --trusted-host pypi.douban.com亲测有效
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