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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_amp_at_index(p_equalizer, u_band):
    '''Get the amplification value for a particular equalizer frequency band.
    @param p_equalizer: valid equalizer handle, must not be NULL.
    @param u_band: index, counting from zero, of the frequency band to get.
    @return: amplification value (Hz); NaN if there is no such frequency band.
    @version: LibVLC 2.2.0 or later.
    '''
    f = _Cfunctions.get('libvlc_audio_equalizer_get_amp_at_index', None) or \
        _Cfunction('libvlc_audio_equalizer_get_amp_at_index', ((1,), (1,),), None,
                    ctypes.c_float, ctypes.c_void_p, ctypes.c_uint)
    return f(p_equalizer, u_band)