  """
  from __future__ import unicode_literals
  from django.db.models.query import QuerySet
  from django.utils import six, timezone
  from django.utils.encoding import force_text
  from django.utils.functional import Promise
  from rest_framework.compat import total_seconds
  import datetime
  import decimal
  import json
 
</s> remove from django.db.models.query import QuerySet
 </s> add import uuid
import json
import decimal
import datetime
 </s> remove import datetime
import decimal
import json
import uuid
 </s> add  </s> remove from django.db.models.query import QuerySet
 </s> add 
from django.db.models.query import QuerySet
  """
  from __future__ import unicode_literals
  from django.db.models.query import QuerySet
  from django.utils import six, timezone
from django.db.models.query import QuerySet
  from django.utils.functional import Promise
  from rest_framework.compat import total_seconds
  import datetime
  import decimal
  import json
keep keep keep keep replace keep keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/utils/encoders.py