如何创建QListView的子类双击和上下文菜单

class MyListView(QListView):
    def __init__(self, parent=None):
        super(MyListView, self).__init__(parent)
    
    def mouseDoubleClickEvent(self, event):
        index = self.indexAt(event.pos())
        if index.isValid():
            item = self.model().itemFromIndex(index)
            # 执行双击操作
            print("双击了项：", item.text())

class MyListView(QListView):
    def __init__(self, parent=None):
        super(MyListView, self).__init__(parent)
    
    def contextMenuEvent(self, event):
        index = self.indexAt(event.pos())
        if index.isValid():
            item = self.model().itemFromIndex(index)
            # 创建上下文菜单
            menu = QMenu(self)
            action1 = menu.addAction("操作1")
            action2 = menu.addAction("操作2")
            # 连接菜单项的槽函数
            action1.triggered.connect(lambda: self.handleContextMenuAction(item, "操作1"))
            action2.triggered.connect(lambda: self.handleContextMenuAction(item, "操作2"))
            # 显示菜单
            menu.exec_(event.globalPos())
    
    def handleContextMenuAction(self, item, action):
        # 执行上下文菜单操作
        print("执行了", action, "，项：", item.text())