def lookup(dic, key, *keys):
    if keys:
        return lookup(dic.get(key, {}), keys[0], *keys[1:])
    return dic.get(key)
deleting secret.
dataset/ETHPy150Open softlayer/softlayer-python/SoftLayer/utils.py/lookup--crossover with--dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/tests/unit/virt/libvirt/test_host.py/HostTestCase.test_delete_secret