pip install xxx报错 Requirement already satisfied: pillow in 

需要在install 后面+Python38\Lib\site-packages这文件夹的路径 +安装包名字

然后安装后报错

WARNING: Target directory C:\Users\Administrator\AppData\Local\Programs\Python\Python38\Lib\site-packages\PIL already exists. Specify --upgrade to force replacement.
WARNING: Target directory C:\Users\Administrator\AppData\Local\Programs\Python\Python38\Lib\site-packages\Pillow-8.2.0.dist-info already exists. Specify --upgrade to force replacement.

这里没去管它 不影响