func lstrip(self: PyBytes): PyBytes {....raises: [], tags: [], forbids: [].}

func lstrip(self: PyBytes; chars: PyBytes): PyBytes {....raises: [], tags: [],
    forbids: [].}

func rstrip(self: PyBytes): PyBytes {....raises: [], tags: [], forbids: [].}

func rstrip(self: PyBytes; chars: PyBytes): PyBytes {....raises: [], tags: [],
    forbids: [].}

func strip(self: PyBytes): PyBytes {....raises: [], tags: [], forbids: [].}

func strip(self: PyBytes; chars: PyBytes): PyBytes {....raises: [], tags: [],
    forbids: [].}