Python升级pip并安装opencv、moviepy包

在环境变量中新建python目录路径 python -m pip install --upgrade pip升级pip，pip install opencv-python安装opencv包 pip install moviepy安装moviepy包。如果下载很慢，可以手动下载某个包https://www.lfd.uci.edu/~gohlke/pythonlibs/#imreg 再用cmd进入wh

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