          Fields are represented using their initial calling arguments.
          This allows us to create descriptive representations for serializer
          instances that show all the declared fields on the serializer.
          """
          return unicode_to_repr(representation.field_repr(self))
  
  
  # Boolean types...
  
  class BooleanField(Field):
 
</s> remove class UniqueValidator(object):
 </s> add class UniqueValidator: </s> remove class CreateOnlyDefault(object):
 </s> add class CreateOnlyDefault: </s> remove         return unicode_to_repr(representation.serializer_repr(self, indent=1))
 </s> add         return representation.serializer_repr(self, indent=1) </s> remove         return six.text_type(self.obj)
 </s> add         return str(self.obj) </s> remove from __future__ import unicode_literals

 </s> add 
        return representation.field_repr(self)
          Fields are represented using their initial calling arguments.
          This allows us to create descriptive representations for serializer
          instances that show all the declared fields on the serializer.
          """
        return representation.field_repr(self)
  
  
  # Boolean types...
  
  class BooleanField(Field):
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/fields.py