原因
在学习python界面图形PySide2，正常安装后出现报错
报错内容
qt.qpa.plugin: Could not load the Qt platform plugin "windows" in "" even though it ...
解决
将如下文件
\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qminimal.dll
\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qoffscreen.dll
\Anaconda3\Lib\site-packages\PySide2\plugins\platforms\qwindows.dll
复制(或覆盖)到这个文件夹即可
\Anaconda3\Library\plugins\platforms\
from:
https://www.jianshu.com/p/1bd2175d63bf
https://stackoverflow.com/questions/41994485/error-could-not-find-or-load-the-qt-platform-plugin-windows-while-using-matplo