'Construct a canvas widget with the parent MASTER.
Valid resource names: background, bd, bg, borderwidth, closeenough,
confine, cursor, height, highlightbackground, highlightcolor,
highlightthickness, insertbackground, insertborderwidth,
insertofftime, insertontime, insertwidth, offset, relief,
scrollregion, selectbackground, selectborderwidth, selectforeground,
state, takefocus, width, xscrollcommand, xscrollincrement,
yscrollcommand, yscrollincrement.'

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

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