如何在pyQt5 contextMenuEvent中获取正确的表行索引

from PyQt5.QtWidgets import QWidget, QMenu, QTableView
from PyQt5.QtCore import Qt

class MyWidget(QWidget):
    def __init__(self):
        super().__init__()

        self.table = QTableView(self)
        # 设置表格属性...

    def contextMenuEvent(self, event):
        menu = QMenu(self)
        # 添加菜单项...

        # 获取点击位置的行索引
        index = self.table.indexAt(event.pos())
        if index.isValid():
            row = index.row()
            print("当前点击的行索引为:", row)

        menu.exec_(event.globalPos())