python PyQt5 窗體置頂和取消置頂

from PyQt5 import QtCore

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