  )
  
  from rest_framework import ISO_8601
  from rest_framework.compat import (
      EmailValidator, MinValueValidator, MaxValueValidator,
      MinLengthValidator, MaxLengthValidator, URLValidator, OrderedDict,
      unicode_repr, unicode_to_repr, parse_duration, duration_string,
  )
 
</s> remove from rest_framework.exceptions import ValidationError
from rest_framework.settings import api_settings
from rest_framework.utils import html, representation, humanize_datetime
import collections
import copy
import datetime
import decimal
import inspect
import re
import uuid
 </s> add  </s> remove from django.utils.dateparse import parse_date, parse_datetime, parse_time
from django.utils.encoding import is_protected_type, smart_text
from django.utils.translation import ugettext_lazy as _
 </s> add  </s> remove from rest_framework.utils.field_mapping import (
    get_url_kwargs, get_field_kwargs,
    get_relation_kwargs, get_nested_relation_kwargs,
    ClassLookupDict
 </s> add from rest_framework.compat import (
    postgres_fields, unicode_to_repr, DurationField as ModelDurationField,
from rest_framework.settings import api_settings
from rest_framework.exceptions import ValidationError
from rest_framework.utils import html, representation, humanize_datetime
  )
  
  from rest_framework import ISO_8601
from rest_framework.settings import api_settings
from rest_framework.exceptions import ValidationError
from rest_framework.utils import html, representation, humanize_datetime
  from rest_framework.compat import (
      EmailValidator, MinValueValidator, MaxValueValidator,
      MinLengthValidator, MaxLengthValidator, URLValidator, OrderedDict,
      unicode_repr, unicode_to_repr, parse_duration, duration_string,
  )
keep keep add keep keep keep keep keep
 Cleanup import following PEP 8 style guide 
rest_framework/fields.py