def contained_by(self, other):
            return self.expr.op('<@')(other)
Borrowed from django.contrib.humanize
dataset/ETHPy150Open RoseOu/flasky/venv/lib/python2.7/site-packages/sqlalchemy/dialects/postgresql/hstore.py/HSTORE.comparator_factory.contained_by--crossover with--dataset/ETHPy150Open eyeseast/python-tablefu/table_fu/formatting.py/intcomma