Works for me. I'd recommend adding a TODO comment here. I've found it to be a quick way to track these kinds of "I'll deal with this later" without disrupting the flow of what you're working on..

```python
def getClusterMachine(self):
    # TODO: Implement this correctly so it returns the setters expected argument.
    return self.clusterdevices
```

That way you can just search the project for TODO later on and find your breadcrumbs.