How to use the mnelab.MainWindow function in mnelab

bundle = NSBundle.mainBundle()
            if bundle:
                info = (bundle.localizedInfoDictionary() or
                        bundle.infoDictionary())
                if info:
                    info["CFBundleName"] = app_name

    matplotlib.use("Qt5Agg")
    app = QApplication(sys.argv)
    app.setApplicationName(app_name)
    app.setOrganizationName("cbrnr")
    if sys.platform.startswith("darwin"):
        app.setAttribute(Qt.AA_DontShowIconsInMenus, True)
    app.setAttribute(Qt.AA_UseHighDpiPixmaps)
    model = Model()
    model.view = MainWindow(model)
    if len(sys.argv) > 1:  # open files from command line arguments
        for f in sys.argv[1:]:
            model.load(f)
    model.view.show()
    sys.exit(app.exec_())