PyQt5 qt.qpa.plugin: Could not load the Qt platform plugin “xcb“ in ““ even though it was found.

Ubuntu:
pyqt5 版本5.15.4
opencv-python 版本4.5.3.56
报错如题，解决方案1：降低opencv版本至4.3.0.36， 另外sudo apt install libxcb-xinerama0
但是低版本的opencv有一些API 也会报错。
方案2：参考

import os

from PyQt5.QtCore import QLibraryInfo
# from PySide2.QtCore import QLibraryInfo

import cv2

os.environ["QT_QPA_PLATFORM_PLUGIN_PATH"] = QLibraryInfo.location(
    QLibraryInfo.PluginsPath
)

亲测好用。