pyqt5 treewidget 右键菜单程序

如下：

import sys
from PyQt5.QtWidgets import QApplication, QMainWindow, QTreeWidgetItem, QMenu, QAction


class TreeWidgetDemo(QMainWindow):
    def __init__(self, parent=None):
        super(TreeWidgetDemo, self).__init__(parent)
        self.setWindowTitle('TreeWidget 例子')
        self.tree = QTreeWidget()
        # 设置列数
        self.tree.setColumnCount(2)
        # 设置树形控件头部的标题
        self.tree.setHeaderLabels(['Key', 'Value'])
        # 设置根节点
        self.treeRoot = QTreeWidgetItem(self.tree)
        self.treeRoot.setText(0, '根节点')
        self.treeRoot.setText(1, '根节点的值')
        # 添加子节点1
        self.treeChild1 = QTreeWidgetItem(self.treeRoot)
        self.treeChild1.setText(0, '子节点1')
        self.treeChild1.setText(1, '子节点1的值')
        # 添加子节点2
        self.treeChild2 = QTreeWidgetItem(self.treeRoot)
        self.treeChild2.setText(0, '子节点2')
        self.treeChild2.setText(1, '子节点2的值')
        # 添加子节点2的子节点
        self.treeChild2Child = QTreeWidgetItem(self.treeChild2)
        self.treeChild2Child.setText(0, '子节点2的子节点')
        self.treeChild2Child.setText(1, '子节点2的子节点的值')
        self.tree.expandAll()
        self.setCentralWidget(self.tree)
        # 设置右键菜单
        self.tree.setContextMenuPolicy(Qt.CustomContextMenu)
        self.tree.customContextMenuRequested.connect(self.context_menu)

    def context_menu(self, pos):
        item = self.tree.itemAt(pos)
        if item is None:
            return
        menu = QMenu()
        delete_action = QAction('删除', self)
        delete_action.triggered.connect(lambda: self.delete_item(item))
        menu.addAction(delete_action)
        menu.exec(QCursor.pos())

    def delete_item(self, item):
        if item == self.treeRoot:
            return
        parent = item.parent()
        parent.removeChild(item)

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

希望可以帮到你！