Removed unnecessary parens in various code.

django/conf/__init__.py

@@ -189,7 +189,7 @@ class UserSettingsHolder:
         deleted = (setting in self._deleted)
         set_locally = (setting in self.__dict__)
         set_on_default = getattr(self.default_settings, 'is_overridden', lambda s: False)(setting)
-        return (deleted or set_locally or set_on_default)
+        return deleted or set_locally or set_on_default
 
     def __repr__(self):
         return '<%(cls)s>' % {

django/contrib/admin/options.py

@@ -240,7 +240,7 @@ class BaseModelAdmin(metaclass=forms.MediaDefiningClass):
 
         if db_field.name in self.raw_id_fields:
             kwargs['widget'] = widgets.ManyToManyRawIdWidget(db_field.remote_field, self.admin_site, using=db)
-        elif db_field.name in (list(self.filter_vertical) + list(self.filter_horizontal)):
+        elif db_field.name in list(self.filter_vertical) + list(self.filter_horizontal):
             kwargs['widget'] = widgets.FilteredSelectMultiple(
                 db_field.verbose_name,
                 db_field.name in self.filter_vertical

django/contrib/contenttypes/management/__init__.py

@@ -61,7 +61,7 @@ def inject_rename_contenttypes_operations(plan=None, apps=global_apps, using=DEF
         available = True
 
     for migration, backward in plan:
-        if ((migration.app_label, migration.name) == ('contenttypes', '0001_initial')):
+        if (migration.app_label, migration.name) == ('contenttypes', '0001_initial'):
             # There's no point in going forward if the initial contenttypes
             # migration is unapplied as the ContentType model will be
             # unavailable from this point.

django/core/files/locks.py

@@ -106,8 +106,8 @@ else:
     else:
         def lock(f, flags):
             ret = fcntl.flock(_fd(f), flags)
-            return (ret == 0)
+            return ret == 0
 
         def unlock(f):
             ret = fcntl.flock(_fd(f), fcntl.LOCK_UN)
-            return (ret == 0)
+            return ret == 0

django/core/files/temp.py

@@ -54,7 +54,7 @@ if os.name == 'nt':
                     pass
                 try:
                     self.unlink(self.name)
-                except (OSError):
+                except OSError:
                     pass
 
         def __del__(self):

django/core/management/commands/dumpdata.py

@@ -173,7 +173,7 @@ class Command(BaseCommand):
             progress_output = None
             object_count = 0
             # If dumpdata is outputting to stdout, there is no way to display progress
-            if (output and self.stdout.isatty() and options['verbosity'] > 0):
+            if output and self.stdout.isatty() and options['verbosity'] > 0:
                 progress_output = self.stdout
                 object_count = sum(get_objects(count_only=True))
             stream = open(output, 'w') if output else None

django/forms/models.py

@@ -1141,7 +1141,7 @@ class ModelChoiceIterator:
             yield self.choice(obj)
 
     def __len__(self):
-        return (len(self.queryset) + (1 if self.field.empty_label is not None else 0))
+        return len(self.queryset) + (1 if self.field.empty_label is not None else 0)
 
     def choice(self, obj):
         return (self.field.prepare_value(obj), self.field.label_from_instance(obj))

django/utils/cache.py

@@ -153,7 +153,7 @@ def get_conditional_response(request, etag=None, last_modified=None, response=No
         if_modified_since = parse_http_date_safe(if_modified_since)
 
     # Step 1 of section 6 of RFC 7232: Test the If-Match precondition.
-    if (if_match_etags and not _if_match_passes(etag, if_match_etags)):
+    if if_match_etags and not _if_match_passes(etag, if_match_etags):
         return _precondition_failed(request)
 
     # Step 2: Test the If-Unmodified-Since precondition.
@@ -162,7 +162,7 @@ def get_conditional_response(request, etag=None, last_modified=None, response=No
         return _precondition_failed(request)
 
     # Step 3: Test the If-None-Match precondition.
-    if (if_none_match_etags and not _if_none_match_passes(etag, if_none_match_etags)):
+    if if_none_match_etags and not _if_none_match_passes(etag, if_none_match_etags):
         if request.method in ('GET', 'HEAD'):
             return _not_modified(request, response)
         else: