小编Fir*_*ero的帖子

使用 python 进行基于说话人识别的项目，并在查找MFCC.

Traceback (most recent call last):
File "neh1.py", line 10, in <module>
    complexSpectrum = numpy.fft(signal)
TypeError: 'module' object is not callable

这是代码的一部分：

import numpy
from scipy.fftpack import dct
from scipy.io import wavfile
sampleRate, signal = wavfile.read("/home/neha/Audio/b6.wav")
numCoefficients = 13 # choose the sive of mfcc array
minHz = 0
maxHz = 22.000
complexSpectrum = numpy.fft(signal)
powerSpectrum = abs(complexSpectrum) ** 2
filteredSpectrum = numpy.dot(powerSpectrum, melFilterBank())
logSpectrum = numpy.log(filteredSpectrum)
dctSpectrum = dct(logSpectrum, type=2) 

会出现什么问题呢？

我无法相信我在如此微不足道的事情上遇到这么多麻烦.

无论出于何种原因,这些代码行导致了 nullpointerexception

Card[] arr = new Card[2];
System.out.print(arr[0].val + "\n"); //this is the line throwing the error

卡被定义为

public class Card {
    public int val;
    public char suit;
}

编译成功,我确保它引用了正确的类.我觉得我忽略了一些小细节.

我也注意到了

Card a = new Card();
Card b = new Card();
Card[] arr = {a, b};
System.out.print(arr[0].val + "\n");

工作得非常好.