[force_unicode](https://docs.djangoproject.com/en/1.4/ref/utils/#django.utils.encoding.force_unicode) is the old name for ```force_text```. So I'd make the import:

```python
try:
    from django.utils.encoding import force_text
except ImportError:
    from django.utils.encoding import force_unicode as force_text  # Django pre 1.5
```