@@ -846,7 +846,7 @@ def clear_cookies():
846846
847847@app.route('/config')
848848def config():
849− return jsonify({'categories': categories.keys(),
849+ return jsonify({'categories': list(categories.keys()),
850850 'engines': [{'name': engine_name,
851851 'categories': engine.categories,
852852 'shortcut': engine.shortcut,
@@ -854,7 +854,7 @@ def config():
854854 'paging': engine.paging,
855855 'language_support': engine.language_support,
856856 'supported_languages':
857− engine.supported_languages.keys()
857+ list(engine.supported_languages.keys())
858858 if isinstance(engine.supported_languages, dict)
859859 else engine.supported_languages,
860860 'safesearch': engine.safesearch,