  
  from django.conf import settings
  from django.utils import importlib
  
  from rest_framework import ISO8601
  from rest_framework.compat import six
  
  
  USER_SETTINGS = getattr(settings, 'REST_FRAMEWORK', None)
  
 
</s> remove from rest_framework import ISO8601
 </s> add from rest_framework import ISO_8601 </s> remove from rest_framework.utils.dates import get_readable_date_format
 </s> add  </s> remove     'TIME_OUTPUT_FORMAT': ISO8601,
 </s> add     'TIME_FORMAT': ISO_8601, </s> remove ISO8601 = 'iso-8601' </s> add  </s> remove envlist = py3.3-django1.5,py3.2-django1.5,py2.7-django1.5,py2.7-django1.4,py2.7-django1.3,py2.6-django1.5,py2.6-django1.4,py2.6-django1.3
 </s> add envlist = py3.3-django1.5,py3.2-django1.5,py2.7-django1.5,py2.6-django1.5,py2.7-django1.4,py2.6-django1.4,py2.7-django1.3,py2.6-django1.3
from rest_framework import ISO_8601
  
  from django.conf import settings
  from django.utils import importlib
  
from rest_framework import ISO_8601
  from rest_framework.compat import six
  
  
  USER_SETTINGS = getattr(settings, 'REST_FRAMEWORK', None)
  
keep keep keep keep replace keep keep keep keep keep
 Clean ups to datetime formatting 
rest_framework/settings.py