函数有一个意想不到的关键字参数 - Python

Question

我想使用James Lyons (Github page)的python_speech_features模块计算音频信号的MFCC。我修改了一下，所以我可以在使用Mel Scale和Bark Scale之间切换，如下所示：

def mfcc(signal, samplerate=16000, winlen=0.025, winstep=0.01, numcep=13,
         nfilt=26, nfft=512, lowfreq=0, highfreq=None, preemph=0.97, 
         ceplifter=22, appendEnergy=True, mel=True,
         winfunc=lambda x:numpy.ones((x,))):

    if mel:
        feat, energy = fbank(signal, samplerate, winlen, winstep, nfilt,
            nfft, lowfreq, highfreq, preemph, winfunc, mel=True)
    else:
        feat, energy = fbank(signal, samplerate, winlen, winstep, nfilt,
            nfft, lowfreq, highfreq, preemph, winfunc, mel=False)
    feat = numpy.log(feat)
    feat = dct(feat, type=2, axis=1, norm='ortho')[:,:numcep]
    feat = lifter(feat,ceplifter)
    if appendEnergy:
        # replace first cepstral coefficient with log of frame energy 
        feat[:,0] = numpy.log(energy) 
    return feat

当mel=True时，它将使用Mel Scale方程计算，当mel=False时，它将使用Bark Scale方程计算。但是，当我尝试在另一个程序中使用此函数时，我收到此错误：

 TypeError: mfcc() got an unexpected keyword argument 'mel'

任何人都可以帮我解决这个问题吗？