如何通过拖动更改QTableView行的顺序并将更改保存到模型中？

from PyQt5.QtWidgets import QApplication, QTableView, QAbstractItemView, QVBoxLayout, QWidget
from PyQt5.QtCore import Qt
from PyQt5.QtGui import QStandardItemModel, QStandardItem

class MyTableView(QTableView):
    def __init__(self, parent=None):
        super(MyTableView, self).__init__(parent)
        self.setDragDropMode(QAbstractItemView.InternalMove)
        self.setSelectionBehavior(QAbstractItemView.SelectRows)
        self.setDragEnabled(True)
        self.setAcceptDrops(True)
        self.setDropIndicatorShown(True)

    def dropEvent(self, event):
        super(MyTableView, self).dropEvent(event)
        self.updateModel()

    def updateModel(self):
        model = self.model()
        rows = self.model().rowCount()
        for row in range(rows):
            item = model.item(row)
            item.setText(str(row + 1))
            model.setItem(row, 0, item)

def main():
    app = QApplication([])
    widget = QWidget()
    layout = QVBoxLayout(widget)
    table_view = MyTableView()
    model = QStandardItemModel()
    model.setColumnCount(1)
    model.setRowCount(5)
    for row in range(5):
        item = QStandardItem(str(row + 1))
        model.setItem(row, 0, item)
    table_view.setModel(model)
    layout.addWidget(table_view)
    widget.show()
    app.exec_()

if __name__ == '__main__':
    main()