def detach_interface(self, instance, vif):
        try:
            del self._interfaces[vif['id']]
        except __HOLE__:
            raise exception.InterfaceDetachFailed(
                    instance_uuid=instance.uuid)
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/virt/fake.py/FakeDriver.detach_interface