Sorry for bikeshedding, but I think the preferred approach with vumi stuff is to do one of these three things in situations where need to span multiple lines:

```python
from go.campaigns.forms import (
    CampaignGeneralForm, CampaignConfigurationForm, CampaignBulkMessageForm)


from go.campaigns.forms import (CampaignGeneralForm,
                                CampaignConfigurationForm,
                                CampaignBulkMessageForm)

from go.campaigns.forms import (
    CampaignGeneralForm,
    CampaignConfigurationForm,
    CampaignBulkMessageForm)
```