  Provides various throttling policies.
  """
  from __future__ import unicode_literals
  from django.core.cache import cache as default_cache
  from django.core.exceptions import ImproperlyConfigured
  
  from rest_framework.settings import api_settings
 
</s> remove import time
 </s> add  </s> remove from django.core.exceptions import ImproperlyConfigured
from django.db import models
 </s> add import operator
from functools import reduce
 </s> remove from django.core.exceptions import PermissionDenied
from django.http import Http404
 </s> add import inspect
import warnings
 </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 django.core.exceptions import ImproperlyConfigured
 </s> add import inspect

import django
from django.utils import six
import time

  Provides various throttling policies.
  """
  from __future__ import unicode_literals
import time

  from django.core.cache import cache as default_cache
  from django.core.exceptions import ImproperlyConfigured
  
  from rest_framework.settings import api_settings
keep keep add keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/throttling.py