解决This application failed to start because it could not find or load the Qt platform plugin “windows

The error is as follows:

Don't pursue any method, just reinstall directly:

1. Open the command prompt and enter:

1.pip install PyQt5 -i https://pypi.douban.com/simple

2. Install PyQt common tools

pip install PyQt5-tools -i https://pypi.douban.com/simple

problem solved! ! ! !