如何使用PySide2 Python后端在QML中嵌入PyQtGraph？

pip install PySide2
pip install pyqtgraph

import sys
from PySide2.QtCore import QUrl
from PySide2.QtGui import QGuiApplication
from PySide2.QtQuick import QQuickView
from PySide2.QtQml import QQmlContext

app = QGuiApplication(sys.argv)

view = QQuickView()
view.setResizeMode(QQuickView.SizeRootObjectToView)

# 将PyQtGraph库导入到QML中
ctxt = view.rootContext()
ctxt.setContextProperty("pyqtgraph", __import__('pyqtgraph'))

# 加载QML文件
view.setSource(QUrl.fromLocalFile('main.qml'))

# 显示QML界面
view.show()

# 运行应用程序
sys.exit(app.exec_())

import QtQuick 2.0

Item {
    width: 400
    height: 400

    // 导入PyQtGraph库
    import pyqtgraph as pg

    // 创建一个绘图区域
    GraphWidget {
        id: graph
    }
}

import QtQuick 2.0
import pyqtgraph as pg

Rectangle {
    width: 400
    height: 400

    // 在绘图区域上添加PyQtGraph的PlotWidget
    Item {
        id: graphItem
        width: parent.width
        height: parent.height

        // 定义绘图区域的属性
        property variant plot: undefined

        onPlotChanged: {
            // 创建或更新PlotWidget
            if (graphItem.plot === undefined) {
                graphItem.plot = pg.PlotWidget(graphItem);
                graphItem.plot.autoRange()
            }
            else {
                graphItem.plot.resize(graphItem.width, graphItem.height)
            }
        }

        onWidthChanged: {
            graphItem.plot.resize(graphItem.width, graphItem.height)
        }

        onHeightChanged: {
            graphItem.plot.resize(graphItem.width, graphItem.height)
        }
    }
}