wxPython - SetHelpString() 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
        fm1 = wx.Menu()
        fileitem = fm1.Append(20, "Item # 1")
        menubar.Append(fm1, '&Menu # 1')
        self.SetMenuBar(menubar)
        self.SetSize((300, 200))
        self.SetTitle('Menu Bar')

        # set helpstring using SetHelpString() function
        menubar.SetHelpString(20, "Help String")
        st = wx.StaticText(self, label ="click Item # 1 in Menu # 1")
        print(menubar.GetHelpString(20))

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


if __name__ == '__main__':
    main()