Remove old-style super calls (#8226)

docs/api-guide/filtering.md

@@ -241,7 +241,7 @@ To dynamically change search fields based on request content, it's possible to s
         def get_search_fields(self, view, request):
             if request.query_params.get('title_only'):
                 return ['title']
-            return super(CustomSearchFilter, self).get_search_fields(view, request)
+            return super().get_search_fields(view, request)
 
 For more details, see the [Django documentation][search-django-admin].
 

docs/api-guide/serializers.md

@@ -1095,7 +1095,7 @@ For example, if you wanted to be able to set which fields should be used by a se
             fields = kwargs.pop('fields', None)
 
             # Instantiate the superclass normally
-            super(DynamicFieldsModelSerializer, self).__init__(*args, **kwargs)
+            super().__init__(*args, **kwargs)
 
             if fields is not None:
                 # Drop any fields that are not specified in the `fields` argument.

docs/tutorial/4-authentication-and-permissions.md

@@ -38,7 +38,7 @@ And now we can add a `.save()` method to our model class:
         formatter = HtmlFormatter(style=self.style, linenos=linenos,
                                   full=True, **options)
         self.highlighted = highlight(self.code, lexer, formatter)
-        super(Snippet, self).save(*args, **kwargs)
+        super().save(*args, **kwargs)
 
 When that's all done we'll need to update our database tables.
 Normally we'd create a database migration in order to do that, but for the purposes of this tutorial, let's just delete the database and start again.

rest_framework/fields.py

@@ -1491,6 +1491,8 @@ class MultipleChoiceField(ChoiceField):
             self.fail('empty')
 
         return {
+            # Arguments for super() are needed because of scoping inside
+            # comprehensions.
             super(MultipleChoiceField, self).to_internal_value(item)
             for item in data
         }

rest_framework/schemas/coreapi.py

@@ -58,7 +58,7 @@ class LinkNode(OrderedDict):
     def __init__(self):
         self.links = []
         self.methods_counter = Counter()
-        super(LinkNode, self).__init__()
+        super().__init__()
 
     def get_available_key(self, preferred_key):
         if preferred_key not in self:
@@ -120,7 +120,7 @@ class SchemaGenerator(BaseSchemaGenerator):
         assert coreapi, '`coreapi` must be installed for schema support.'
         assert coreschema, '`coreschema` must be installed for schema support.'
 
-        super(SchemaGenerator, self).__init__(title, url, description, patterns, urlconf)
+        super().__init__(title, url, description, patterns, urlconf)
         self.coerce_method_names = api_settings.SCHEMA_COERCE_METHOD_NAMES
 
     def get_links(self, request=None):
@@ -346,7 +346,7 @@ class AutoSchema(ViewInspector):
         * `manual_fields`: list of `coreapi.Field` instances that
             will be added to auto-generated fields, overwriting on `Field.name`
         """
-        super(AutoSchema, self).__init__()
+        super().__init__()
         if manual_fields is None:
             manual_fields = []
         self._manual_fields = manual_fields
@@ -587,7 +587,7 @@ class ManualSchema(ViewInspector):
         * `fields`: list of `coreapi.Field` instances.
         * `description`: String description for view. Optional.
         """
-        super(ManualSchema, self).__init__()
+        super().__init__()
         assert all(isinstance(f, coreapi.Field) for f in fields), "`fields` must be a list of coreapi.Field instances"
         self._fields = fields
         self._description = description