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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_band_frequency(u_index):
    '''Get a particular equalizer band frequency.
    This value can be used, for example, to create a label for an equalizer band control
    in a user interface.
    @param u_index: index of the band, counting from zero.
    @return: equalizer band frequency (Hz), or -1 if there is no such band.
    @version: LibVLC 2.2.0 or later.
    '''
    f = _Cfunctions.get('libvlc_audio_equalizer_get_band_frequency', None) or \
        _Cfunction('libvlc_audio_equalizer_get_band_frequency', ((1,),), None,
                    ctypes.c_float, ctypes.c_uint)
    return f(u_index)