Python语音识别KeyError BufferedRead

Question

我正在用Python中的语音识别软件包对一些音频文件进行转码，并且在录制该文件时收到一个KeyError（io.BufferedReader）。我真的不知道这意味着什么，也不知道如何解决它。任何帮助都将不胜感激

下面是我的代码和错误

import speech_recognition as sr 

r = sr.Recognizer()

AudioFile = sr.AudioFile('/Users/USERNAME/Audio_file.wav')
with AudioFile as source:
    audio = r.record(source)

预期结果： 字符串变量与音频脚本。
实际结果：以下错误

Traceback (most recent call last):   
File "<stdin>", line 1, in <module>   
File "<string>", line 2, in <module>   
File "/Users/USERNAME/anaconda2/envs/python_sr/lib/python3.7/site-packages/speech_recognition/__init__.py",line 295, in __exit__ self.audio_reader.close()   
File "/Users/USERNAME/anaconda2/envs/python_sr/lib/python3.7/wave.py", line 194, in close file.close()   File "<string>", line 131, in close 
KeyError: <_io.BufferedReader name='/Users/USERNAME/Audio_file.wav'>