def METHOD_NAME(self, label, command, isdef=0):
    "Return command button gridded in command frame."
    b = Button(self.buttonframe,
               text=label, command=command,
               default=isdef and "active" or "normal")
    cols,rows=self.buttonframe.grid_size()
    b.grid(pady=1,row=rows,column=0,sticky="ew")
    self.buttonframe.grid(rowspan=rows+1)
    return b