/tmp/snapshot-pyside-6.2-rel/pyside-setup/examples/declarative/signals/qmltopy4

(You can also check this code in the repository)

main.py

import os
from pathlib import Path
import sys
from PySide6.QtCore import QObject, QUrl
from PySide6.QtGui import QGuiApplication
from PySide6.QtQuick import QQuickView


def sayThis(s):
    print(s)


if __name__ == '__main__':
    app = QGuiApplication(sys.argv)
    view = QQuickView()
    qml_file = os.fspath(Path(__file__).resolve().parent / 'view.qml')
    view.setSource(QUrl.fromLocalFile(qml_file))
    if view.status() == QQuickView.Error:
        sys.exit(-1)

    root = view.rootObject()
    button = root.findChild(QObject, "buttonMouseArea")
    button.clicked.connect(lambda: sayThis("clicked button (signal directly connected)"))

    view.show()
    res = app.exec()
    # Deleting the view before it goes out of scope is required to make sure all child QML instances
    # are destroyed in the correct order.
    del view
    sys.exit(res)

view.qml

import QtQuick

Rectangle {
    id: page

    width: 500; height: 200
    color: "lightgray"

    Rectangle {
        id: button
        width: 150; height: 40
        color: "darkgray"
        anchors.horizontalCenter: page.horizontalCenter
        anchors.verticalCenter: page.verticalCenter
        MouseArea {
            id: buttonMouseArea
            objectName: "buttonMouseArea"
            anchors.fill: parent
        }
        Text {
            id: buttonText
            text: "Press me!"
            anchors.horizontalCenter: button.horizontalCenter
            anchors.verticalCenter: button.verticalCenter
            font.pointSize: 16
        }
    }
}