def item_attributes(self, item):
        return {}
Constants can be looked up by their associated value, defined by the
dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/utils/feedgenerator.py/SyndicationFeed.item_attributes--crossover with--dataset/ETHPy150Open nlloyd/SubliminalCollaborator/libs/twisted/python/test/test_constants.py/ValuesTests.test_lookupByValue