### Error Info Screenshot
### Error Reason
Matplotlib.backends.qt_compat.py decide the version of qt library according to sys.modules firstly, os.environ secondly and the sequence of PyQt6, PySide6, PyQt5, PySide 2 and etc finally. Import PyQt5 after matplotlib make that there is no PyQt5 in sys.modules so that it choose PyQt6 or PySide6 before PyQt5 if it installed.
因为Matplotlib.backends.qt_compat.py优先根据导入的库决定要使用的Python Qt的库，如果没有导入则根据环境变量PYQT_APT决定，再不济就按照PyQt6, PySide6, PyQt5, PySide 2的顺序导入已经安装的库。因为ui.py先导入matplotlib而不是PYQT5导致matplotlib在导入的库里找不到Qt的库，又没有指定环境变量，然后用户安装了Qt6的库的话就导入Qt6的库去了
Vega
CrystalRays
weida wang
unknown
