def __setitem__(self, k, v):
        v = pickle.dumps(v)
        DirDBM.__setitem__(self, k, v)
Gets a dense range ordered by keys. Returns an ordered list of 
dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/persisted/dirdbm.py/Shelf.__setitem__--crossover with--dataset/ETHPy150Open AppScale/appscale/AppDB/dbinterface_batch.py/AppDBInterface.range_query