def Close(self):
    pass
http://www.w3.org/TR/sparql11-update/#deleteWhere
dataset/ETHPy150Open log2timeline/dfvfs/examples/recursive_hasher.py/StdoutWriter.Close--crossover with--dataset/ETHPy150Open RDFLib/rdflib/rdflib/plugins/sparql/update.py/evalDeleteWhere