def manage(module, **params):
    try:
        return proxies[module]
    except KeyError:
        return proxies.setdefault(module, _DBProxy(module, **params))
On a successful finish, L{Action.__exit__} adds fields from
dataset/ETHPy150Open goFrendiAsgard/kokoropy/kokoropy/packages/sqlalchemy/pool.py/manage--crossover with--dataset/ETHPy150Open ClusterHQ/eliot/eliot/tests/test_action.py/ActionTests.test_addSuccessFields