import sys
from PySide2.QtWidgets import QApplication, QMainWindow
from PySide2.QtCore import QFile
#from ui_mainwindow_5_13_2 import Ui_NamedMainWindow
from ui_mainwindow_5_14_1 import Ui_NamedMainWindow

class MainWindow(QMainWindow):
    def __init__(self):
        super(MainWindow, self).__init__()
        self.ui = Ui_NamedMainWindow()
        self.ui.setupUi(self)
        print(self.objectName())
        print(f'self.objectName()="{self.objectName()}"')

if __name__ == "__main__":
    app = QApplication(sys.argv)

    window = MainWindow()
    window.show()

    sys.exit(app.exec_())