问题描述：
在VScode运行代码时，出现如下提示：
This application failed to start because it could not find or load the Qt platform plugin “windows” in “”.
Available platform plugins are: direct2d.
Reinstalling the application may fix this problem.**
This application failed to start because it could not find or load the Qt platform plugin "windows"
in "".
Available platform plugins are: direct2d.
Reinstalling the application may fix this problem.
原因分析：
代码中并未使用QT，但问题提示指向QT
经查阅Google，发现问题是matplotlib的显示窗口被占有，与QT发生冲突造成代码bug。
解决方案：
在代码顶部添加下面两行：
import matplotlib
matplotlib.use('TKAgg')