def revert(self, ba):
        c = ba.copy()
        for i in xrange(len(self.mapping)):
            ba[self.mapping[i]] = c[i]
        return ba
Uses filter() to return a list of objects, or raise a Http404 exception if
dataset/ETHPy150Open pixelogik/NearPy/nearpy/hashes/permutation/permute.py/Permute.revert--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.2/django/shortcuts/__init__.py/get_list_or_404