def fqdn_exists(fqdn, **kwargs):
    for type_, qset in _build_queries(fqdn, **kwargs):
        if qset.exists():
            return qset
    return False
like begin_group / end_group but for the with statement.
dataset/ETHPy150Open mozilla/inventory/mozdns/search_utils.py/fqdn_exists--crossover with--dataset/ETHPy150Open ipython/ipython-py3k/IPython/lib/pretty.py/_PrettyPrinterBase.group