python PyQt5 窗体置顶和取消置顶

from PyQt5 import QtCore


    def on_inTopCheckBox_clicked(self, checked):
        if not checked:
            dialog.setWindowFlags(QtCore.Qt.Widget) #取消置顶
        else:
            dialog.setWindowFlags(QtCore.Qt.WindowStaysOnTopHint) #置顶
        self.show()