QMainWindow and multiple inheritance from QWidget

import sys

from PySide6.QtCore import QLibraryInfo, qVersion
from PySide6.QtWidgets import QApplication, QWidget, QMainWindow


class MyWidget(QWidget):
    pass


class Window(QMainWindow, MyWidget):
    def __init__(self):
        super().__init__()


if __name__ == '__main__':
    print('Python {}.{}'.format(sys.version_info[0], sys.version_info[1]))
    print(QLibraryInfo.build())
    app = QApplication(sys.argv)
    window = Window()
    window.setWindowTitle(qVersion())
    window.show()
    sys.exit(app.exec_())