2 files changed, 11 insertions, 1 deletions
diff --git a/rest_framework/utils/encoders.py b/rest_framework/utils/encoders.py
index 0bd24939..2160d18b 100644
--- a/rest_framework/utils/encoders.py
+++ b/rest_framework/utils/encoders.py
@@ -6,9 +6,11 @@ from django.db.models.query import QuerySet
 from django.utils import six, timezone
 from django.utils.encoding import force_text
 from django.utils.functional import Promise
+from rest_framework.compat import total_seconds
 import datetime
 import decimal
 import json
+import uuid
 
 
 class JSONEncoder(json.JSONEncoder):
@@ -38,10 +40,12 @@ class JSONEncoder(json.JSONEncoder):
                 representation = representation[:12]
             return representation
         elif isinstance(obj, datetime.timedelta):
-            return six.text_type(obj.total_seconds())
+            return six.text_type(total_seconds(obj))
         elif isinstance(obj, decimal.Decimal):
             # Serializers will coerce decimals to strings by default.
             return float(obj)
+        elif isinstance(obj, uuid.UUID):
+            return six.text_type(obj)
         elif isinstance(obj, QuerySet):
             return tuple(obj)
         elif hasattr(obj, 'tolist'):
diff --git a/rest_framework/utils/serializer_helpers.py b/rest_framework/utils/serializer_helpers.py
index 65a04d06..f9960603 100644
--- a/rest_framework/utils/serializer_helpers.py
+++ b/rest_framework/utils/serializer_helpers.py
@@ -16,6 +16,9 @@ class ReturnDict(OrderedDict):
     def copy(self):
         return ReturnDict(self, serializer=self.serializer)
 
+    def __repr__(self):
+        return dict.__repr__(self)
+
 
 class ReturnList(list):
     """
@@ -27,6 +30,9 @@ class ReturnList(list):
         self.serializer = kwargs.pop('serializer')
         super(ReturnList, self).__init__(*args, **kwargs)
 
+    def __repr__(self):
+        return list.__repr__(self)
+
 
 class BoundField(object):
     """