python - 为什么在目录中循环访问.wav文件时显示错误，但在不循环时工作正常？

Question

以下成功运行:

import speech_recognition as sr

filename = 'audiofiles/myaudiofile.wav'

# initiailse the recognizer
r = sr.Recognizer()

with sr.AudioFile(filename) as source:
    # listen for the data (load audio to memory)
    audio_data = r.record(source)
    # recognize (convert from speech to text)
    text = r.recognize_google(audio_data)
    print(text)

...并输出.wav文件中说出的单词的文本。
当我运行以下代码时(要检查它是否适用于多个文件，我将很快将其添加到此目录中):

import os

directory = 'audiofiles'

for filename in os.listdir(directory):
    with sr.AudioFile(filename) as source:
        # listen for the data (load audio to memory)
        audio_data = r.record(source)
        # recognize (convert from speech to text)
        text = r.recognize_google(audio_data)
        print(text)
        print('---')

...文本输出正确，但随后出现以下错误。为什么？我怎样才能解决这个问题？

ValueError: Audio file could not be read as PCM WAV, AIFF/AIFF-C, or Native FLAC; check if file is corrupted or in another format

Answer 1

有一个不是.wav文件的隐藏文件。所以我添加了if filename.endswith('.wav'):像这样:

for filename in os.listdir(directory):
    if filename.endswith('.wav'):
        with sr.AudioFile(filename) as source:
            # listen for the data (load audio to memory)
            audio_data = r.record(source)
            # recognize (convert from speech to text)
            text = r.recognize_google(audio_data)
            print(text)
            print('---')

...并且成功运行。