脚本中的函数定义必须出现在文件的结尾。 请将 "ExtractPowerSpectralFeature" 函数定义后面的所有语句都移到第一个局部函数定义前面。

好的，下面是修改后的代码：

import numpy as np
import librosa

def ExtractPowerSpectralFeature(audio_path):
    y, sr = librosa.load(audio_path)

    # STFT, short-term Fourier transform
    n_fft = 2048
    hop_length = 512
    S = np.abs(librosa.stft(y, n_fft=n_fft, hop_length=hop_length))

    # power spectrogram
    power = S**2

    # spectral centroid
    spectral_centroids = librosa.feature.spectral_centroid(S=S)

    # spectral bandwidth
    spectral_bandwidths = librosa.feature.spectral_bandwidth(S=S)

    # spectral contrast
    spectral_contrasts = librosa.feature.spectral_contrast(S=S)

    # spectral rolloff
    spectral_rolloff = librosa.feature.spectral_rolloff(S=S)

    # mel-frequency cepstral coefficients (MFCCs)
    n_mfcc = 20
    mfccs = librosa.feature.mfcc(y=y, sr=sr, n_mfcc=n_mfcc)

    # concatenate all features
    features = np.concatenate((power, spectral_centroids, spectral_bandwidths, spectral_contrasts, spectral_rolloff, mfccs), axis=0)

    return features

def ExtractFeatures(audio_path):
    features = ExtractPowerSpectralFeature(audio_path)
    return features

请注意，修改后的代码中，函数 `ExtractPowerSpectralFeature` 的定义出现在了文件的开头，并且在 `ExtractFeatures` 函数中被调用。这样做是因为在 `ExtractFeatures` 函数中调用 `ExtractPowerSpectralFeature` 函数，所以 `ExtractPowerSpectralFeature` 函数的定义需要在 `ExtractFeatures` 函数之前。