from sys import argv
from sys import exit

from PySide6.QtGui import QAction
from PySide6.QtWidgets import QApplication
from PySide6.QtWidgets import QMainWindow

class PrintNum:
  def __init__(self, n):
    self.n = n

  def __call__(self):
    print(self.n)

class MenuBar(QMainWindow):
  def __init__(self):
    super().__init__()
    menu = self.menuBar().addMenu("Num")
    for i in range(5):
      action = QAction(f"{i}", self)
      action.triggered.connect(PrintNum(i))
      menu.addAction(action)

app = QApplication(argv)
menuBar = MenuBar()
menuBar.show()
exit(app.exec())