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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_media_player_set_rate(p_mi, rate):
    '''Set movie play rate.
    @param p_mi: the Media Player.
    @param rate: movie play rate to set.
    @return: -1 if an error was detected, 0 otherwise (but even then, it might not actually work depending on the underlying media protocol).
    '''
    f = _Cfunctions.get('libvlc_media_player_set_rate', None) or \
        _Cfunction('libvlc_media_player_set_rate', ((1,), (1,),), None,
                    ctypes.c_int, MediaPlayer, ctypes.c_float)
    return f(p_mi, rate)