python安装库，报错 [WinError 5] 拒绝访问

ERROR: Could not install packages due to an OSError: [WinError 5] 拒绝访问。: ‘C:\ProgramData\Anaconda3\Lib\site-packages\cv2\cv2.pyd’

原因：权限问题
解决：安装时 加 --user
pip install --user mediapipe -i https://pypi.tuna.tsinghua.edu.cn/simple