  from rest_framework import (
      HTTP_HEADER_ENCODING, exceptions, permissions, renderers, status
  )
  from rest_framework.authentication import (
      BaseAuthentication, BasicAuthentication, RemoteUserAuthentication, SessionAuthentication,
      TokenAuthentication)
  from rest_framework.authtoken.models import Token
  from rest_framework.authtoken.views import obtain_auth_token
  from rest_framework.compat import is_authenticated
  from rest_framework.response import Response
  from rest_framework.test import APIClient, APIRequestFactory
 
</s> remove from rest_framework.compat import is_authenticated
 </s> add  </s> remove from rest_framework.compat import is_anonymous
 </s> add  </s> remove from rest_framework.compat import ResolverMatch, guardian, set_many
 </s> add from rest_framework.compat import ResolverMatch, guardian </s> remove from rest_framework.compat import include
 </s> add  </s> remove     pygments_css, template_render
 </s> add     pygments_css
    BaseAuthentication, BasicAuthentication, RemoteUserAuthentication,
    SessionAuthentication, TokenAuthentication
)
  from rest_framework import (
      HTTP_HEADER_ENCODING, exceptions, permissions, renderers, status
  )
  from rest_framework.authentication import (
    BaseAuthentication, BasicAuthentication, RemoteUserAuthentication,
    SessionAuthentication, TokenAuthentication
)
    BaseAuthentication, BasicAuthentication, RemoteUserAuthentication,
    SessionAuthentication, TokenAuthentication
)
  from rest_framework.authtoken.models import Token
  from rest_framework.authtoken.views import obtain_auth_token
  from rest_framework.compat import is_authenticated
  from rest_framework.response import Response
  from rest_framework.test import APIClient, APIRequestFactory
keep keep keep keep replace replace keep keep keep keep keep
 Remove Django 1.8 & 1.9 compatibility code (#5481)

* Identify code that needs to be pulled out of/removed from compat.py

* Extract modern code from get_names_and_managers in compat.py and remove compat code

* Extract modern code from is_authenticated() in compat.py and remove.

* Extract modern code from is_anonymous() in compat.py and remove

* Extract modern code from get_related_model() from compat.py and remove

* Extract modern code from value_from_object() in compat.py and remove

* Update postgres compat

JSONField now always available.

* Remove DecimalValidator compat

* Remove get_remote_field compat

* Remove template_render compat

Plus isort.

* Remove set_many compat

* Remove include compat 
tests/test_authentication.py