解决qt.qpa.plugin: Could not load the Qt platform plugin “windows“ in ““ even though it was found.

运行后报错

qt.qpa.plugin: Could not load the Qt platform plugin "windows" in "" even though it was found.
This application failed to start because no Qt platform plugin could be initialized. Reinstalling the application may fix this problem.

Available platform plugins are: direct2d, minimal, offscreen, windows.

Qt平台插件问题：这个错误通常与matplotlib的后端配置有关。matplotlib依赖于Qt来显示图形界面，但是看起来系统没有正确配置Qt平台插件。

解决方案：

在脚本开始处添加以下代码，以更改matplotlib的后端为'agg'，这是一个不需要任何图形界面的后端，适合生成图像文件。

import matplotlib
matplotlib.use('agg')  # 设置matplotlib的后端为'agg'
import matplotlib.pyplot as plt

添加这段代码后，能够正常运行并生成图像文件，而不需要显示图形界面。