Remove redundant parentheses in return statements

rest_framework/authentication.py

@@ -101,7 +101,7 @@ class BasicAuthentication(BaseAuthentication):
         if not user.is_active:
             raise exceptions.AuthenticationFailed(_('User inactive or deleted.'))
 
-        return (user, None)
+        return user, None
 
     def authenticate_header(self, request):
         return 'Basic realm="%s"' % self.www_authenticate_realm
@@ -128,7 +128,7 @@ class SessionAuthentication(BaseAuthentication):
         self.enforce_csrf(request)
 
         # CSRF passed with authenticated user
-        return (user, None)
+        return user, None
 
     def enforce_csrf(self, request):
         """
@@ -197,7 +197,7 @@ class TokenAuthentication(BaseAuthentication):
         if not token.user.is_active:
             raise exceptions.AuthenticationFailed(_('User inactive or deleted.'))
 
-        return (token.user, token)
+        return token.user, token
 
     def authenticate_header(self, request):
         return self.keyword

rest_framework/fields.py

@@ -489,21 +489,21 @@ class Field(object):
           have validation applied as normal.
         """
         if self.read_only:
-            return (True, self.get_default())
+            return True, self.get_default()
 
         if data is empty:
             if getattr(self.root, 'partial', False):
                 raise SkipField()
             if self.required:
                 self.fail('required')
-            return (True, self.get_default())
+            return True, self.get_default()
 
         if data is None:
             if not self.allow_null:
                 self.fail('null')
-            return (True, None)
+            return True, None
 
-        return (False, data)
+        return False, data
 
     def run_validation(self, data=empty):
         """

rest_framework/filters.py

@@ -192,7 +192,7 @@ class OrderingFilter(BaseFilterBackend):
     def get_default_ordering(self, view):
         ordering = getattr(view, 'ordering', None)
         if isinstance(ordering, six.string_types):
-            return (ordering,)
+            return ordering,
         return ordering
 
     def get_default_valid_fields(self, queryset, view, context={}):

rest_framework/pagination.py

@@ -666,7 +666,7 @@ class CursorPagination(BasePagination):
         )
 
         if isinstance(ordering, six.string_types):
-            return (ordering,)
+            return ordering,
         return tuple(ordering)
 
     def decode_cursor(self, request):

rest_framework/relations.py

@@ -43,7 +43,7 @@ class Hyperlink(six.text_type):
         return ret
 
     def __getnewargs__(self):
-        return(str(self), self.name,)
+        return str(self), self.name
 
     @property
     def name(self):

rest_framework/request.py

@@ -117,7 +117,7 @@ class ForcedAuthentication(object):
         self.force_token = force_token
 
     def authenticate(self, request):
-        return (self.force_user, self.force_token)
+        return self.force_user, self.force_token
 
 
 class Request(object):
@@ -295,7 +295,7 @@ class Request(object):
             # request was made with 'multipart/form-data', then the request stream
             # will already have been exhausted.
             if self._supports_form_parsing():
-                return (self._request.POST, self._request.FILES)
+                return self._request.POST, self._request.FILES
             stream = None
 
         if stream is None or media_type is None:
@@ -304,7 +304,7 @@ class Request(object):
             else:
                 empty_data = {}
             empty_files = MultiValueDict()
-            return (empty_data, empty_files)
+            return empty_data, empty_files
 
         parser = self.negotiator.select_parser(self, self.parsers)
 
@@ -326,10 +326,10 @@ class Request(object):
         # Parser classes may return the raw data, or a
         # DataAndFiles object.  Unpack the result as required.
         try:
-            return (parsed.data, parsed.files)
+            return parsed.data, parsed.files
         except AttributeError:
             empty_files = MultiValueDict()
-            return (parsed, empty_files)
+            return parsed, empty_files
 
     def _authenticate(self):
         """

rest_framework/schemas.py

@@ -110,7 +110,7 @@ def endpoint_ordering(endpoint):
         'PATCH': 3,
         'DELETE': 4
     }.get(method, 5)
-    return (path, method_priority)
+    return path, method_priority
 
 
 class EndpointInspector(object):

rest_framework/serializers.py

@@ -1301,7 +1301,7 @@ class ModelSerializer(Serializer):
         ('dict of updated extra kwargs', 'mapping of hidden fields')
         """
         if getattr(self.Meta, 'validators', None) is not None:
-            return (extra_kwargs, {})
+            return extra_kwargs, {}
 
         model = getattr(self.Meta, 'model')
         model_fields = self._get_model_fields(

rest_framework/test.py

@@ -156,7 +156,7 @@ class APIRequestFactory(DjangoRequestFactory):
         """
 
         if data is None:
-            return ('', content_type)
+            return '', content_type
 
         assert format is None or content_type is None, (
             'You may not set both `format` and `content_type`.'

rest_framework/throttling.py

@@ -103,11 +103,11 @@ class SimpleRateThrottle(BaseThrottle):
         <allowed number of requests>, <period of time in seconds>
         """
         if rate is None:
-            return (None, None)
+            return None, None
         num, period = rate.split('/')
         num_requests = int(num)
         duration = {'s': 1, 'm': 60, 'h': 3600, 'd': 86400}[period[0]]
-        return (num_requests, duration)
+        return num_requests, duration
 
     def allow_request(self, request, view):
         """

rest_framework/utils/serializer_helpers.py

@@ -28,7 +28,7 @@ class ReturnDict(OrderedDict):
     def __reduce__(self):
         # Pickling these objects will drop the .serializer backlink,
         # but preserve the raw data.
-        return (dict, (dict(self),))
+        return dict, (dict(self),)
 
 
 class ReturnList(list):
@@ -48,7 +48,7 @@ class ReturnList(list):
     def __reduce__(self):
         # Pickling these objects will drop the .serializer backlink,
         # but preserve the raw data.
-        return (list, (list(self),))
+        return list, (list(self),)
 
 
 class BoundField(object):

rest_framework/views.py

@@ -305,7 +305,7 @@ class APIView(View):
             return conneg.select_renderer(request, renderers, self.format_kwarg)
         except Exception:
             if force:
-                return (renderers[0], renderers[0].media_type)
+                return renderers[0], renderers[0].media_type
             raise
 
     def perform_authentication(self, request):
@@ -355,9 +355,9 @@ class APIView(View):
         incoming request. Returns a two-tuple of (version, versioning_scheme)
         """
         if self.versioning_class is None:
-            return (None, None)
+            return None, None
         scheme = self.versioning_class()
-        return (scheme.determine_version(request, *args, **kwargs), scheme)
+        return scheme.determine_version(request, *args, **kwargs), scheme
 
     # Dispatch methods
 

tests/test_model_serializer.py

@@ -601,7 +601,7 @@ class DisplayValueTargetModel(models.Model):
     name = models.CharField(max_length=100)
 
     def __str__(self):
-        return '%s Color' % (self.name)
+        return '%s Color' % self.name
 
 
 class DisplayValueModel(models.Model):
@@ -629,7 +629,7 @@ class TestRelationalFieldDisplayValue(TestCase):
     def test_custom_display_value(self):
         class TestField(serializers.PrimaryKeyRelatedField):
             def display_value(self, instance):
-                return 'My %s Color' % (instance.name)
+                return 'My %s Color' % instance.name
 
         class TestSerializer(serializers.ModelSerializer):
             color = TestField(queryset=DisplayValueTargetModel.objects.all())

tests/test_pagination.py

@@ -705,7 +705,7 @@ class TestCursorPagination(CursorPaginationTestsMixin):
         else:
             previous = None
 
-        return (previous, current, next, previous_url, next_url)
+        return previous, current, next, previous_url, next_url
 
 
 class CursorPaginationModel(models.Model):
@@ -763,7 +763,7 @@ class TestCursorPaginationWithValueQueryset(CursorPaginationTestsMixin, TestCase
         else:
             previous = None
 
-        return (previous, current, next, previous_url, next_url)
+        return previous, current, next, previous_url, next_url
 
 
 def test_get_displayed_page_numbers():

tests/test_versioning.py

@@ -48,7 +48,7 @@ class AllowedVersionsView(RequestVersionView):
     def determine_version(self, request, *args, **kwargs):
         scheme = self.versioning_class()
         scheme.allowed_versions = ('v1', 'v2')
-        return (scheme.determine_version(request, *args, **kwargs), scheme)
+        return scheme.determine_version(request, *args, **kwargs), scheme
 
 
 class AllowedAndDefaultVersionsView(RequestVersionView):
@@ -56,14 +56,14 @@ class AllowedAndDefaultVersionsView(RequestVersionView):
         scheme = self.versioning_class()
         scheme.allowed_versions = ('v1', 'v2')
         scheme.default_version = 'v2'
-        return (scheme.determine_version(request, *args, **kwargs), scheme)
+        return scheme.determine_version(request, *args, **kwargs), scheme
 
 
 class AllowedWithNoneVersionsView(RequestVersionView):
     def determine_version(self, request, *args, **kwargs):
         scheme = self.versioning_class()
         scheme.allowed_versions = ('v1', 'v2', None)
-        return (scheme.determine_version(request, *args, **kwargs), scheme)
+        return scheme.determine_version(request, *args, **kwargs), scheme
 
 
 class AllowedWithNoneAndDefaultVersionsView(RequestVersionView):
@@ -71,7 +71,7 @@ class AllowedWithNoneAndDefaultVersionsView(RequestVersionView):
         scheme = self.versioning_class()
         scheme.allowed_versions = ('v1', 'v2', None)
         scheme.default_version = 'v2'
-        return (scheme.determine_version(request, *args, **kwargs), scheme)
+        return scheme.determine_version(request, *args, **kwargs), scheme
 
 
 factory = APIRequestFactory()