okapi-web

Try to group your imports in three different groups: 1) standard library imports, 2) django and third party libs and 3) your own imports. Using this schema these imports would be like this:

```python
from collections import defaultdict
import json
import numpy
import operator

from django.http import HttpResponse

from okapiserver.requestinfo.models import Datas
``` 
As you can see you can put an empty line to separate each block of imports.