wxPython - EnableTool() function in wx.Toolbar

import wx


class Example(wx.Frame):

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

        self.InitUI()

    def InitUI(self):
        pnl = wx.Panel(self)
        self.toolbar = self.CreateToolBar()
        qtool = self.toolbar.AddTool(12, 'Quit', wx.Bitmap('/Desktop/wxPython/signs.png'))
        self.toolbar.Realize()

        self.Bind(wx.EVT_TOOL, self.OnQuit, qtool)

        self.SetSize((350, 250))
        self.SetTitle('Simple toolbar')
        self.Centre()
        self.btn = wx.Button(pnl, label ='Disable', pos =(20, 20))

        self.btn.Bind(wx.EVT_BUTTON, self.Onclick)

        self.SetSize((350, 250))
        self.SetTitle('wx.Button')
        self.Centre()


    def OnQuit(self, e):
        self.Close()

    def Onclick(self, e):
        # disable tool using EnableTool
        self.toolbar.EnableTool(12, False)


def main():

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


if __name__ == '__main__':
    main()