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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:

def libvlc_audio_equalizer_get_preset_name(u_index):
    '''Get the name of a particular equalizer preset.
    This name can be used, for example, to prepare a preset label or menu in a user
    interface.
    @param u_index: index of the preset, counting from zero.
    @return: preset name, or NULL if there is no such preset.
    @version: LibVLC 2.2.0 or later.
    '''
    f = _Cfunctions.get('libvlc_audio_equalizer_get_preset_name', None) or \
        _Cfunction('libvlc_audio_equalizer_get_preset_name', ((1,),), None,
                    ctypes.c_char_p, ctypes.c_uint)
    return f(u_index)