Python - FindItemById() function in wx.MenuBar

import wx


class Example(wx.Frame):

    def __init__(self, *args, **kwargs):
        super(Example, self).__init__(*args, **kwargs)

        self.InitUI()

    def InitUI(self):
        # create MenuBar using MenuBar() function
        menubar = wx.MenuBar()
        # add menu to MenuBar
        fileMenu = wx.Menu()
        # add submenu item
        fileItem = fileMenu.Append(20, 'SubMenu')
        menubar.Append(fileMenu, '&Menu# 1')
        self.SetMenuBar(menubar)
        self.SetSize((300, 200))
        self.SetTitle('Menu Bar')
        # get wx.MenuItem object
        menuitem = menubar.FindItemById(20)
        # print wx.MenuItem object tuple id = 20
        print(menuitem)
        # print label of menuitem
        print(menuitem.GetLabel())
         

def main():

    app = wx.App()
    ex = Example(None)
    ex.Show()
    app.MainLoop()


if __name__ == '__main__':
    main()