diff --git a/rest_framework/fields.py b/rest_framework/fields.py
index c44440ecd..1e23b35f0 100644
--- a/rest_framework/fields.py
+++ b/rest_framework/fields.py
@@ -11,7 +11,9 @@ import uuid
 from django.conf import settings
 from django.core.exceptions import ValidationError as DjangoValidationError
 from django.core.exceptions import ObjectDoesNotExist
-from django.core.validators import EmailValidator, RegexValidator, ip_address_validators, URLValidator
+from django.core.validators import (
+    EmailValidator, RegexValidator, URLValidator, ip_address_validators
+)
 from django.forms import FilePathField as DjangoFilePathField
 from django.forms import ImageField as DjangoImageField
 from django.utils import six, timezone
@@ -24,8 +26,8 @@ from django.utils.translation import ugettext_lazy as _
 from rest_framework import ISO_8601
 from rest_framework.compat import (
     MaxLengthValidator, MaxValueValidator, MinLengthValidator,
-    MinValueValidator, OrderedDict, duration_string,
-    parse_duration, unicode_repr, unicode_to_repr
+    MinValueValidator, OrderedDict, duration_string, parse_duration,
+    unicode_repr, unicode_to_repr
 )
 from rest_framework.exceptions import ValidationError
 from rest_framework.settings import api_settings