def set_scrollbars_cb(self, w, tf):
        """This callback is invoked when the user checks the 'Use Scrollbars'
        box in the preferences pane."""
        scrollbars = 'on' if tf else 'off'
        self.t_.set(scrollbars=scrollbars)
def set_scrollbars_cb ( self , w , tf ) : scrollbars = 'on' if tf else 'off' self . t_ . set ( scrollbars = scrollbars )
This callback is invoked when the user checks the 'Use Scrollbars'
        box in the preferences pane.