  
  from django.utils import six
  from rest_framework import ISO_8601
  from rest_framework.compat import importlib
  
  
 
</s> remove from django.test.signals import setting_changed
from django.conf import settings
 </s> add  </s> remove from django.utils import six
import django
import inspect
 </s> add  </s> remove from django.utils.dateparse import parse_date, parse_datetime, parse_time
from django.utils.encoding import is_protected_type, smart_text
from django.utils.translation import ugettext_lazy as _
 </s> add 
from django.conf import settings
from django.test.signals import setting_changed

  
  from django.utils import six
from django.conf import settings
from django.test.signals import setting_changed

  from rest_framework import ISO_8601
  from rest_framework.compat import importlib
  
  
keep add keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/settings.py