|  | @@ -41,7 +41,7 @@ class Setting(object):
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				|  |  |      """Base class of user settings"""
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				|  |  |  
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				|  |  |      def __init__(self, default_value, **kwargs):
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				|  |  | -        super(Setting, self).__init__()
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				|  |  | +        super().__init__()
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				|  |  |          self.value = default_value
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				|  |  |          for key, value in kwargs.items():
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				|  |  |              setattr(self, key, value)
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				|  | @@ -275,7 +275,7 @@ class EnginesSetting(SwitchableSetting):
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				|  |  |      """Engine settings"""
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				|  |  |  
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				|  |  |      def _post_init(self):
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				|  |  | -        super(EnginesSetting, self)._post_init()
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				|  |  | +        super()._post_init()
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				|  |  |          transformed_choices = []
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				|  |  |          for engine_name, engine in self.choices.items():  # pylint: disable=no-member,access-member-before-definition
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				|  |  |              for category in engine.categories:
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				|  | @@ -302,7 +302,7 @@ class PluginsSetting(SwitchableSetting):
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				|  |  |      """Plugin settings"""
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				|  |  |  
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				|  |  |      def _post_init(self):
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				|  |  | -        super(PluginsSetting, self)._post_init()
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				|  |  | +        super()._post_init()
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				|  |  |          transformed_choices = []
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				|  |  |          for plugin in self.choices:  # pylint: disable=access-member-before-definition
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				|  |  |              transformed_choice = dict()
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				|  | @@ -319,7 +319,7 @@ class Preferences(object):
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				|  |  |      """Validates and saves preferences to cookies"""
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				|  |  |  
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				|  |  |      def __init__(self, themes, categories, engines, plugins):
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				|  |  | -        super(Preferences, self).__init__()
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				|  |  | +        super().__init__()
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				|  |  |  
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				|  |  |          self.key_value_settings = {
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				|  |  |              'categories': MultipleChoiceSetting(
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