  from django.core.exceptions import ImproperlyConfigured
  
  from rest_framework.settings import api_settings
  
  
  class BaseThrottle(object):
 
</s> remove             request.user.is_authenticated()
 </s> add             is_authenticated(request.user) </s> remove             (request.user.is_authenticated() or not self.authenticated_users_only) and
 </s> add             (is_authenticated(request.user) or not self.authenticated_users_only) and </s> remove         return request.user and request.user.is_authenticated()
 </s> add         return request.user and is_authenticated(request.user) </s> remove         if request.user.is_authenticated():
 </s> add         if is_authenticated(request.user):
from rest_framework.compat import is_authenticated
  from django.core.exceptions import ImproperlyConfigured
  
from rest_framework.compat import is_authenticated
  from rest_framework.settings import api_settings
  
  
  class BaseThrottle(object):
keep add keep keep keep keep
 Access `request.user.is_authenticated` as property not method, under Django 1.10+ (#4358)

* For Django >=1.10 use user.is_authenticated, not user.is_authenticated() 
rest_framework/throttling.py