removed old style object inheritance, super() call and python2compat decorator from utils

rest_framework/utils/encoders.py

@@ -63,4 +63,4 @@ class JSONEncoder(json.JSONEncoder):
                 pass
         elif hasattr(obj, '__iter__'):
             return tuple(item for item in obj)
-        return super(JSONEncoder, self).default(obj)
+        return super().default(obj)

rest_framework/utils/field_mapping.py

@@ -16,7 +16,7 @@ NUMERIC_FIELD_TYPES = (
 )
 
 
-class ClassLookupDict(object):
+class ClassLookupDict:
     """
     Takes a dictionary with classes as keys.
     Lookups against this object will traverses the object's inheritance

rest_framework/utils/mediatypes.py

@@ -5,7 +5,6 @@ See https://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7
 """
 
 from django.http.multipartparser import parse_header
-from django.utils.encoding import python_2_unicode_compatible
 
 from rest_framework import HTTP_HEADER_ENCODING
 
@@ -45,8 +44,7 @@ def order_by_precedence(media_type_lst):
     return [media_types for media_types in ret if media_types]
 
 
-@python_2_unicode_compatible
-class _MediaType(object):
+class _MediaType:
     def __init__(self, media_type_str):
         self.orig = '' if (media_type_str is None) else media_type_str
         self.full_type, self.params = parse_header(self.orig.encode(HTTP_HEADER_ENCODING))

rest_framework/utils/serializer_helpers.py

@@ -16,7 +16,7 @@ class ReturnDict(OrderedDict):
 
     def __init__(self, *args, **kwargs):
         self.serializer = kwargs.pop('serializer')
-        super(ReturnDict, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     def copy(self):
         return ReturnDict(self, serializer=self.serializer)
@@ -39,7 +39,7 @@ class ReturnList(list):
 
     def __init__(self, *args, **kwargs):
         self.serializer = kwargs.pop('serializer')
-        super(ReturnList, self).__init__(*args, **kwargs)
+        super().__init__(*args, **kwargs)
 
     def __repr__(self):
         return list.__repr__(self)
@@ -50,7 +50,7 @@ class ReturnList(list):
         return (list, (list(self),))
 
 
-class BoundField(object):
+class BoundField:
     """
     A field object that also includes `.value` and `.error` properties.
     Returned when iterating over a serializer instance,
@@ -104,7 +104,7 @@ class NestedBoundField(BoundField):
     def __init__(self, field, value, errors, prefix=''):
         if value is None or value is '':
             value = {}
-        super(NestedBoundField, self).__init__(field, value, errors, prefix)
+        super().__init__(field, value, errors, prefix)
 
     def __iter__(self):
         for field in self.fields.values():