|  | @@ -846,7 +846,7 @@ def clear_cookies():
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				|  |  |  
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				|  |  |  @app.route('/config')
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				|  |  |  def config():
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				|  |  | -    return jsonify({'categories': categories.keys(),
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				|  |  | +    return jsonify({'categories': list(categories.keys()),
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				|  |  |                      'engines': [{'name': engine_name,
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				|  |  |                                   'categories': engine.categories,
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				|  |  |                                   'shortcut': engine.shortcut,
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				|  | @@ -854,7 +854,7 @@ def config():
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				|  |  |                                   'paging': engine.paging,
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				|  |  |                                   'language_support': engine.language_support,
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				|  |  |                                   'supported_languages':
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				|  |  | -                                 engine.supported_languages.keys()
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				|  |  | +                                 list(engine.supported_languages.keys())
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				|  |  |                                   if isinstance(engine.supported_languages, dict)
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				|  |  |                                   else engine.supported_languages,
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				|  |  |                                   'safesearch': engine.safesearch,
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