def num_tuples(self, rel_key):
        table = self.metadata.tables[str(rel_key)]
        return self.engine.execute(table.count()).scalar()
@see: twisted.names.client.lookupMailboxInfo
dataset/ETHPy150Open uwescience/raco/raco/backends/sql/catalog.py/SQLCatalog.num_tuples--crossover with--dataset/ETHPy150Open kuri65536/python-for-android/python-modules/twisted/twisted/names/common.py/ResolverBase.lookupMailboxInfo