Would be a bit easier to have a `flag_status_names` dict on the class, then just return the right one in this method:

```python
class Bug(models.Model):
    ...
    flag_status_names = {
        '?': 'question',
        '+': 'plus',
        '-': 'minus',
    }

    def _flag_status_name(self, status):
        return self.flag_status_names.get(status, 'none')
```