@pyqtProperty('QStringList', constant=True)
def carmanufacturers(self):
    return [mfc.name for mfc in CarManufacturers]

@pyqtProperty('QString', notify=mfcChanged)
def mfc(self):
    return str(CarManufacturers[self._mfc].value)

@modus.setter
def mfc(self, mfc):
    pass
I want to set a Qt QML Combobox to a PyQt5 object property