request.data.get('datafile') vs request.data['datafile']?

`request.data.get('datafile')` won't fail immediately if the field is missing, but it will fail just below, at `datafile.name`. Is there a reason for the `get`? and it looks like we're expecting either name or datafile, but not both, but one is required?

views.py:
```python
datafile_name = self.request.data.get('datafile').name

if 'name' in self.request.data:
name = self.request.data['name']
else:
name = op.split(datafile_name)[1]
```