def drop_right(self, n):
        return self._transform(transformations.CACHE_T, transformations.drop_right_t(n))
Deep copy of a QuerySet doesn't populate the cache
dataset/ETHPy150Open EntilZha/PyFunctional/functional/pipeline.py/Sequence.drop_right--crossover with--dataset/ETHPy150Open AppScale/appscale/AppServer/lib/django-1.5/django/db/models/query.py/QuerySet.__deepcopy__