Removed custom python_2_unicode_compatible. Closes #2183

rest_framework/authtoken/models.py

 import binascii
 import os
+
 from django.conf import settings
 from django.db import models
+from django.utils.encoding import python_2_unicode_compatible
 
 
 # Prior to Django 1.5, the AUTH_USER_MODEL setting does not exist.
@@ -11,6 +13,7 @@ from django.db import models
 AUTH_USER_MODEL = getattr(settings, 'AUTH_USER_MODEL', 'auth.User')
 
 
+@python_2_unicode_compatible
 class Token(models.Model):
     """
     The default authorization token model.
@@ -35,5 +38,5 @@ class Token(models.Model):
     def generate_key(self):
         return binascii.hexlify(os.urandom(20)).decode()
 
-    def __unicode__(self):
+    def __str__(self):
         return self.key

rest_framework/compat.py

@@ -6,11 +6,12 @@ versions of django/python, and compatibility wrappers around optional packages.
 # flake8: noqa
 from __future__ import unicode_literals
 
+import inspect
+
 from django.core.exceptions import ImproperlyConfigured
 from django.conf import settings
 from django.utils import six
 import django
-import inspect
 
 
 # Handle django.utils.encoding rename in 1.5 onwards.
@@ -49,7 +50,6 @@ try:
 except ImportError:
     django_filters = None
 
-
 if django.VERSION >= (1, 6):
     def clean_manytomany_helptext(text):
         return text
@@ -123,7 +123,6 @@ else:
             return [m.upper() for m in self.http_method_names if hasattr(self, m)]
 
 
-
 # MinValueValidator, MaxValueValidator et al. only accept `message` in 1.8+
 if django.VERSION >= (1, 8):
     from django.core.validators import MinValueValidator, MaxValueValidator
@@ -187,6 +186,7 @@ if 'patch' not in View.http_method_names:
 # RequestFactory only provides `generic` from 1.5 onwards
 from django.test.client import RequestFactory as DjangoRequestFactory
 from django.test.client import FakePayload
+
 try:
     # In 1.5 the test client uses force_bytes
     from django.utils.encoding import force_bytes as force_bytes_or_smart_bytes
@@ -194,21 +194,22 @@ except ImportError:
     # In 1.4 the test client just uses smart_str
     from django.utils.encoding import smart_str as force_bytes_or_smart_bytes
 
+
 class RequestFactory(DjangoRequestFactory):
     def generic(self, method, path,
             data='', content_type='application/octet-stream', **extra):
         parsed = urlparse.urlparse(path)
         data = force_bytes_or_smart_bytes(data, settings.DEFAULT_CHARSET)
         r = {
-            'PATH_INFO':      self._get_path(parsed),
-            'QUERY_STRING':   force_text(parsed[4]),
+            'PATH_INFO': self._get_path(parsed),
+            'QUERY_STRING': force_text(parsed[4]),
             'REQUEST_METHOD': six.text_type(method),
         }
         if data:
             r.update({
                 'CONTENT_LENGTH': len(data),
-                'CONTENT_TYPE':   six.text_type(content_type),
-                'wsgi.input':     FakePayload(data),
+                'CONTENT_TYPE': six.text_type(content_type),
+                'wsgi.input': FakePayload(data),
             })
         elif django.VERSION <= (1, 4):
             # For 1.3 we need an empty WSGI payload
@@ -287,10 +288,12 @@ try:
     import provider as oauth2_provider
     from provider import scope as oauth2_provider_scope
     from provider import constants as oauth2_constants
+
     if oauth2_provider.__version__ in ('0.2.3', '0.2.4'):
         # 0.2.3 and 0.2.4 are supported version that do not support
         # timezone aware datetimes
         import datetime
+
         provider_now = datetime.datetime.now
     else:
         # Any other supported version does use timezone aware datetimes
@@ -301,7 +304,7 @@ except ImportError:
     oauth2_constants = None
     provider_now = None
 
-# `seperators` argument to `json.dumps()` differs between 2.x and 3.x
+# `separators` argument to `json.dumps()` differs between 2.x and 3.x
 # See: http://bugs.python.org/issue22767
 if six.PY3:
     SHORT_SEPARATORS = (',', ':')
@@ -316,30 +319,9 @@ from django.utils.functional import Promise
 
 if six.PY3:
     def is_non_str_iterable(obj):
-        if (isinstance(obj, str) or
-            (isinstance(obj, Promise) and obj._delegate_text)):
+        if isinstance(obj, str) or (isinstance(obj, Promise) and obj._delegate_text):
             return False
         return hasattr(obj, '__iter__')
 else:
     def is_non_str_iterable(obj):
         return hasattr(obj, '__iter__')
-
-
-try:
-    from django.utils.encoding import python_2_unicode_compatible
-except ImportError:
-    def python_2_unicode_compatible(klass):
-        """
-        A decorator that defines __unicode__ and __str__ methods under Python 2.
-        Under Python 3 it does nothing.
-
-        To support Python 2 and 3 with a single code base, define a __str__ method
-        returning text and apply this decorator to the class.
-        """
-        if '__str__' not in klass.__dict__:
-            raise ValueError("@python_2_unicode_compatible cannot be applied "
-                             "to %s because it doesn't define __str__()." %
-                             klass.__name__)
-        klass.__unicode__ = klass.__str__
-        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
-        return klass

rest_framework/utils/mediatypes.py

@@ -5,6 +5,7 @@ See http://www.w3.org/Protocols/rfc2616/rfc2616-sec3.html#sec3.7
 """
 from __future__ import unicode_literals
 from django.http.multipartparser import parse_header
+from django.utils.encoding import python_2_unicode_compatible
 from rest_framework import HTTP_HEADER_ENCODING
 
 
@@ -43,6 +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):
     def __init__(self, media_type_str):
         if media_type_str is None:
@@ -79,9 +81,6 @@ class _MediaType(object):
         return 3
 
     def __str__(self):
-        return self.__unicode__().encode('utf-8')
-
-    def __unicode__(self):
         ret = "%s/%s" % (self.main_type, self.sub_type)
         for key, val in self.params.items():
             ret += "; %s=%s" % (key, val)

tests/test_description.py

@@ -2,6 +2,7 @@
 
 from __future__ import unicode_literals
 from django.test import TestCase
+from django.utils.encoding import python_2_unicode_compatible
 from rest_framework.compat import apply_markdown, smart_text
 from rest_framework.views import APIView
 from .description import ViewWithNonASCIICharactersInDocstring
@@ -107,6 +108,7 @@ class TestViewNamesAndDescriptions(TestCase):
         """
         # use a mock object instead of gettext_lazy to ensure that we can't end
         # up with a test case string in our l10n catalog
+        @python_2_unicode_compatible
         class MockLazyStr(object):
             def __init__(self, string):
                 self.s = string
@@ -114,9 +116,6 @@ class TestViewNamesAndDescriptions(TestCase):
             def __str__(self):
                 return self.s
 
-            def __unicode__(self):
-                return self.s
-
         class MockView(APIView):
             __doc__ = MockLazyStr("a gettext string")
 

tests/test_relations_generic.py

@@ -3,8 +3,8 @@ from django.contrib.contenttypes.models import ContentType
 from django.contrib.contenttypes.generic import GenericRelation, GenericForeignKey
 from django.db import models
 from django.test import TestCase
+from django.utils.encoding import python_2_unicode_compatible
 from rest_framework import serializers
-from rest_framework.compat import python_2_unicode_compatible
 
 
 @python_2_unicode_compatible