PyQt /PySide获取屏幕分辨率

获取屏幕分辨率做缩放处理：

# 获取显示器分辨率
self.desktop = QApplication.desktop()
self.screenRect = self.desktop.screenGeometry()
self.screenheight = self.screenRect.height()
self.screenwidth = self.screenRect.width()
print("Screen height {}".format(self.screenheight))
print("Screen width {}".format(self.screenwidth))