wxPython - GetClassDefaultAttributes() function in wx.BitmapButton

import wx


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)
        bmp = wx.Bitmap('right.png')
        self.btn = wx.BitmapButton(self.panel, id = wx.ID_ANY, bitmap = bmp,
                          size =(bmp.GetWidth()+10, bmp.GetHeight()+10))

        # wx.VisualAttributes OBJECT 
        va = self.btn.GetClassDefaultAttributes(variant = wx.WINDOW_VARIANT_NORMAL)

        # PRINT PROPERTIES
        print(va.colBg)
        print(va.colFg)
        print(va.font)

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

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


if __name__ == '__main__':
    main()