  returned by list views.
  """
  from __future__ import unicode_literals
  
  from django.core.exceptions import ImproperlyConfigured
  from django.db import models
  from django.utils import six
  from rest_framework.compat import django_filters, guardian, get_model_name
  from rest_framework.settings import api_settings
  from functools import reduce
  import operator
 
</s> remove from rest_framework.compat import django_filters, guardian, get_model_name
 </s> add from django.db import models
from django.core.exceptions import ImproperlyConfigured
 </s> remove from functools import reduce
import operator
 </s> add from rest_framework.compat import django_filters, guardian, get_model_name
 </s> remove from django.core.exceptions import ImproperlyConfigured
 </s> add import inspect

import django
from django.utils import six </s> remove from django.core.exceptions import ImproperlyConfigured
from django.db import models
 </s> add 
import operator
from functools import reduce

  returned by list views.
  """
  from __future__ import unicode_literals
  
import operator
from functools import reduce

import operator
from functools import reduce

  from django.utils import six
  from rest_framework.compat import django_filters, guardian, get_model_name
  from rest_framework.settings import api_settings
  from functools import reduce
  import operator
keep keep keep keep replace replace keep keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/filters.py