'Modify or query scale options.
Setting a value for any of the "from", "from_" or "to" options
generates a <<RangeChanged>> event.'

def configure(self, cnf=None, **kw):

    if cnf:
        kw.update(cnf)
    Widget.configure(self, **kw)
    if any([('from' in kw), ('from_' in kw), ('to' in kw)]):
        self.event_generate('<<RangeChanged>>')
