当我在MainWindow pyqt5中时，如何防止小部件中的QPushButton.clicked执行？

button = self.findChild(QtWidgets.QPushButton, 'button_name')
button.setEnabled(False)

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.button = QtWidgets.QPushButton('Button', self)
        self.button.clicked.connect(self.on_button_clicked)

    def on_button_clicked(self):
        pass

class MainWindow(QtWidgets.QMainWindow):
    def __init__(self):
        super().__init__()
        self.button = QtWidgets.QPushButton('Button', self)
        self.button.clicked.connect(self.empty_slot)

    def empty_slot(self):
        pass