Qtreewidget右键时隐藏部分菜单

您可以在QTreeWidget的customContextMenuRequested信号中获取右键点击的位置，然后根据该位置隐藏您想要隐藏的部分菜单。

以下是示例代码：

from PyQt5.QtWidgets import QMenu, QAction, QTreeWidget, QTreeWidgetItem, QApplication

class MyTreeWidget(QTreeWidget):
    def __init__(self, parent=None):
        super(MyTreeWidget, self).__init__(parent)
        self.initUI()

    def initUI(self):
        # 添加示例节点
        root = QTreeWidgetItem(self)
        root.setText(0, "Root")
        child1 = QTreeWidgetItem(root)
        child1.setText(0, "Child1")
        child2 = QTreeWidgetItem(root)
        child2.setText(0, "Child2")

        # 添加右键菜单
        self.setContextMenuPolicy(Qt.CustomContextMenu)
        self.customContextMenuRequested.connect(self.showContextMenu)

        self.menu = QMenu(self)
        self.action1 = QAction("Action1", self)
        self.menu.addAction(self.action1)
        self.action2 = QAction("Action2", self)
        self.menu.addAction(self.action2)
        self.action3 = QAction("Action3", self)
        self.menu.addAction(self.action3)

    def showContextMenu(self, pos):
        # 获取右键点击的节点
        item = self.itemAt(pos)
        if not item:
            return

        # 隐藏部分菜单
        if item.text(0) == "Child1":
            self.action2.setVisible(False)
        else:
            self.action2.setVisible(True)

        # 显示菜单
        self.menu.exec_(self.mapToGlobal(pos))

if __name__ == '__main__':
    import sys
    app = QApplication(sys.argv)
    tree = MyTreeWidget()
    tree.show()
    sys.exit(app.exec_())

在此示例中，当右键点击“Child1”节点时，将隐藏“Action2”菜单，而右键点击“Root”或“Child2”节点时，将显示所有菜单。