  
  from django.db import DataError
  from django.utils.translation import ugettext_lazy as _
  
  from rest_framework.compat import unicode_to_repr
  from rest_framework.exceptions import ValidationError
  from rest_framework.utils.representation import smart_repr
  
  
  # Robust filter and exist implementations. Ensures that queryset.exists() for
 
</s> remove from __future__ import unicode_literals

 </s> add  </s> remove from django.utils import six, timezone
 </s> add from django.utils import timezone </s> remove from rest_framework.compat import Mapping, postgres_fields, unicode_to_repr
 </s> add from rest_framework.compat import Mapping, postgres_fields </s> remove from rest_framework.compat import unicode_to_repr
 </s> add  </s> remove from __future__ import unicode_literals

 </s> add 
  
  from django.db import DataError
  from django.utils.translation import ugettext_lazy as _
  

  from rest_framework.exceptions import ValidationError
  from rest_framework.utils.representation import smart_repr
  
  
  # Robust filter and exist implementations. Ensures that queryset.exists() for
keep keep keep keep replace keep keep keep keep keep
 Dropped Python 2 compatibility. (#6615)

Thanks to Jon Dufresne (@jdufresne) for review.

Co-authored-by: Asif Saif Uddin <auvipy@gmail.com>
Co-authored-by: Rizwan Mansuri <Rizwan@webbyfox.com> 
rest_framework/validators.py