  from rest_framework import serializers
  from rest_framework.serializers import Serializer
  
  
  class TimestampedModel(models.Model):
      added = models.DateTimeField(auto_now_add=True)
      updated = models.DateTimeField(auto_now=True)
 
</s> remove from rest_framework.compat import timezone, parse_date, parse_datetime, parse_time
 </s> add from rest_framework.compat import (timezone, parse_date, parse_datetime,
                                   parse_time) </s> remove     format = ', '.join(formats).replace(ISO_8601, 'YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]')
 </s> add     format = ', '.join(formats).replace(ISO_8601,
             'YYYY-MM-DDThh:mm[:ss[.uuuuuu]][+HHMM|-HHMM|Z]')
from rest_framework.fields import Field
from collections import namedtuple
from uuid import uuid4
  from rest_framework import serializers
  from rest_framework.serializers import Serializer
from rest_framework.fields import Field
from collections import namedtuple
from uuid import uuid4
  
  
  class TimestampedModel(models.Model):
      added = models.DateTimeField(auto_now_add=True)
      updated = models.DateTimeField(auto_now=True)
keep add keep keep keep keep keep
 Added humanized field names and types 
rest_framework/tests/fields.py