'Construct a checkbutton widget with the parent MASTER.
Valid resource names: activebackground, activeforeground, anchor,
background, bd, bg, bitmap, borderwidth, command, cursor,
disabledforeground, fg, font, foreground, height,
highlightbackground, highlightcolor, highlightthickness, image,
indicatoron, justify, offvalue, onvalue, padx, pady, relief,
selectcolor, selectimage, state, takefocus, text, textvariable,
underline, variable, width, wraplength.'

def __init__(self, master=None, cnf={}, **kw):

    Widget.__init__(self, master, 'checkbutton', cnf, kw)
