python_converter_main.py

import sys

from PyQt6.QtGui import QGuiApplication
from PyQt6.QtQml import QQmlApplicationEngine
from PyQt6.QtQuick import QQuickWindow

from func import Converter


QQuickWindow.setSceneGraphBackend('software')

app = QGuiApplication(sys.argv)

engine = QQmlApplicationEngine()
engine.load('UI/main.qml')
convert = Converter()
engine.rootObjects()[0].setProperty('converter', convert)

engine.quit.connect(app.quit)

sys.exit(app.exec())