如何用pygtk增加Spinbutton的值？

Question

我有一个gtk旋转按钮“ self.spinbutton_points_team_left”，并希望通过以下方式增加它

self.spinbutton_points_team_left.spin(gtk.SPIN_STEP_FORWARD,increment=0)

但是由于错误而停止

File "/home/family/glade/scoreboard_uwr/scoreboard_uwr.py", line 2478, in transferlog_to_board
    self.spinbutton_points_team_left.spin(gtk.SPIN_STEP_FORWARD,increment=0)
  File "/usr/lib/python3/dist-packages/gi/overrides/__init__.py", line 39, in __getattr__
    return getattr(self._introspection_module, name)
  File "/usr/lib/python3/dist-packages/gi/module.py", line 139, in __getattr__
    self.__name__, name))
AttributeError: 'gi.repository.Gtk' object has no attribute 'SPIN_STEP_FORWARD'

有人建议我在这里做错了吗？