如何在pyqt5中禁用选项卡的所有内容

from PyQt5.QtWidgets import QApplication, QTabWidget, QWidget

class TabWidget(QTabWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 添加选项卡
        self.addTab(Widget1(), "Tab 1")
        self.addTab(Widget2(), "Tab 2")
        self.addTab(Widget3(), "Tab 3")

class Widget1(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 添加选项卡1的内容
        # ...


class Widget2(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 添加选项卡2的内容
        # ...


class Widget3(QWidget):
    def __init__(self):
        super().__init__()
        self.initUI()

    def initUI(self):
        # 添加选项卡3的内容
        # ...

if __name__ == '__main__':
    app = QApplication(sys.argv)
    tab_widget = TabWidget()
    tab_widget.show()
    sys.exit(app.exec_())

tab_widget.setTabEnabled(index, False)