'Construct a button widget with the parent MASTER.
STANDARD OPTIONS
activebackground, activeforeground, anchor,
background, bitmap, borderwidth, cursor,
disabledforeground, font, foreground
highlightbackground, highlightcolor,
highlightthickness, image, justify,
padx, pady, relief, repeatdelay,
repeatinterval, takefocus, text,
textvariable, underline, wraplength
WIDGET-SPECIFIC OPTIONS
command, compound, default, height,
overrelief, state, width'

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

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