I have the following code :
myList =[\'a\',\'b\'] rb=wx.RadioBox(self.panel, -1, \"Options :\", (0, 0), wx.DefaultSize,myList, 2, wx.RA_SPECIFY_COLS)
If you just want initial selection invisible, you can have a try with ShowItem(item, show=True)
example here:
myList =['','a','b'] rb=wx.RadioBox(self.panel, -1, "Options :", (0, 0), wx.DefaultSize,myList, 2, wx.RA_SPECIFY_COLS) rb.ShowItem(0, show=False)