错误:FileNotFoundError:[Errno 2]没有这样的文件或目录

我使用ubuntu和python运行Google云语音.首先，我将所有代码放在一个名为lu.py的文件中:

I use ubuntu and python to run google cloud speech. First I put all the code in a file called lu.py :

 import io
 import os
 from google.cloud import speech
...

# The name of the audio file to transcribe
file_name = os.path.join(
    os.path.dirname(__file__),
    'resources',
    'audio.raw')

# Loads the audio into memory
with io.open(file_name, 'rb') as audio_file:
    content = audio_file.read()
    audio = types.RecognitionAudio(content=content)
...

当我在终端中运行python lu.py时，它说

When I ran python lu.py in terminal, it said

FileNotFoundError: [Errno 2] No such file or directory: 'resources/audio.raw'

我对路径问题不熟悉，所以我不知道哪里出了问题.

I'm not familiar with the path problem, so I don't know where is wrong.