wxPython - Enable() function in wx.RadioButton

import wx

APP_EXIT = 1


class Example(wx.Frame):

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

        self.InitUI()

    def InitUI(self):
        self.pnl = wx.Panel(self)
        
        # create radio button at position (30, 10)
        self.rb1 = wx.RadioButton(self.pnl, label ='Btn1', 
                             pos =(30, 10), size =(100, 20))


        # disable the radio button using Enable() function
        self.rb1.Enable(False)


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


if __name__ == '__main__':
    main()