[doron@doron ~]$ gnome-tweak-tool
Caching gsettings: <gtweak.gsettings._GSettingsSchema: org.gnome.desktop.background>
Caching gsettings: <gtweak.gsettings._GSettingsSchema: org.gnome.shell.clock>
Caching gconf: <gtweak.gconf.GConfSetting: /desktop/gnome/shell/windows/button_layout> (--short-docs)
Caching gconf: <gtweak.gconf.GConfSetting: /desktop/gnome/shell/windows/button_layout> (--long-docs)
Caching gsettings: <gtweak.gsettings._GSettingsSchema: org.gnome.settings-daemon.plugins.power>
Traceback (most recent call last):
  File "/usr/bin/gnome-tweak-tool", line 72, in <module>
    MainWindow()
  File "/usr/bin/gnome-tweak-tool", line 43, in __init__
    model)
  File "/usr/lib/python2.7/site-packages/gtweak/tweakview.py", line 38, in __init__
    self._model.load_tweaks()
  File "/usr/lib/python2.7/site-packages/gtweak/tweakmodel.py", line 97, in load_tweaks
    mods = __import__("gtweak.tweaks", globals(), locals(), tweak_files, 0)
  File "/usr/lib/python2.7/site-packages/gtweak/tweaks/tweak_shell.py", line 162, in <module>
    GSettingsComboEnumTweak("org.gnome.settings-daemon.plugins.power", "lid-close-battery-action", size_group=sg),
  File "/usr/lib/python2.7/site-packages/gtweak/widgets.py", line 100, in __init__
    _type, values = self.settings.get_range(key_name)
AttributeError: 'GSettingsSetting' object has no attribute 'get_range'