如何用python替换qml线列中的多个点？

import QtQuick 2.0

Item {
    id: root

    property var points: [
        { x: 10, y: 20 },
        { x: 30, y: 40 },
        { x: 50, y: 60 }
    ]

    Repeater {
        model: root.points
        delegate: Rectangle {
            width: 10
            height: 10
            color: "red"
            x: modelData.x
            y: modelData.y
        }
    }
}

from PySide2.QtCore import QUrl
from PySide2.QtGui import QGuiApplication
from PySide2.QtQml import QQmlApplicationEngine
from PySide2.QtCore import QObject, QPropertyAnimation, Property

class Point(QObject):
    def __init__(self, x, y):
        super().__init__()
        self._x = x
        self._y = y

    def getX(self):
        return self._x

    def setX(self, value):
        self._x = value

    def getY(self):
        return self._y

    def setY(self, value):
        self._y = value

    x = Property(int, getX, setX)
    y = Property(int, getY, setY)

if __name__ == "__main__":
    app = QGuiApplication([])
    engine = QQmlApplicationEngine()

    points = [
        Point(10, 20),
        Point(30, 40),
        Point(50, 60)
    ]

    engine.rootContext().setContextProperty("points", points)
    engine.load(QUrl.fromLocalFile("main.qml"))

    if not engine.rootObjects():
        sys.exit(-1)

    sys.exit(app.exec_())

import QtQuick 2.0

Item {
    id: root

    Repeater {
        model: points
        delegate: Rectangle {
            width: 10
            height: 10
            color: "red"
            x: model.x
            y: model.y
        }
    }
}