[ovirt-users] python sdk and params

I'm playing with the python sdk. When I want to delete a VM, I see that it takes a action with settings : [@param action.force: boolean] [@param action.vm.disks.detach_only: boolean] [@param action.async: boolean] [@param action.grace_period.expiry: long] [@param correlation_id: any string] But if I try action_params = params.Action(vm={'disks': {'detach_only': False}}) print action_params.export_(sys.stdout, 0) I'm getting : AttributeError: 'dict' object has no attribute 'export_' How can I build the argument to params.Action ?