'Return (frame, others) for testing.
Others is a list of value, label pairs.
A gridded frame from make_frame is filled with radio buttons.'

def create_other_buttons(self):

    frame = self.make_frame('Direction')[0]
    var = self.engine.backvar
    others = [(1, 'Up'), (0, 'Down')]
    for (val, label) in others:
        btn = Radiobutton(frame, anchor='w', variable=var, value=val, text=label)
        btn.pack(side='left', fill='both')
        if (var.get() == val):
            btn.select()
    return (frame, others)
