id summary reporter owner description type status component version severity resolution keywords cc stage has_patch needs_docs needs_tests needs_better_patch easy ui_ux 19576 Use `six.with_metaclass` uniformously accross code base Simon Charette nobody Sometimes `object` is inherited twice when it's not needed. Simple patch that passes on Python 2.7.3 and 3.2 with SQlite to be uploaded. Cleanup/optimization closed Python 3 dev Normal fixed six Ready for checkin 1 0 0 0 0 0