def _get_pools(driver_info, filters=None):

    s_client = _get_client(**driver_info)
    return s_client.pools.list(filters=filters)
Find records in `a` that are not in `b`. E.g.::
dataset/ETHPy150Open openstack/ironic/ironic/drivers/modules/seamicro.py/_get_pools--crossover with--dataset/ETHPy150Open alimanfoo/petl/petl/transform/setops.py/recordcomplement