尝试使用IBM Speech to Text读取python中的音频文件。代码无法检测文件

pip install ibm-watson

from ibm_watson import SpeechToTextV1
from ibm_cloud_sdk_core.authenticators import IAMAuthenticator

# 设置API密钥和URL
authenticator = IAMAuthenticator('your_api_key')
speech_to_text = SpeechToTextV1(authenticator=authenticator)
speech_to_text.set_service_url('your_service_url')

# 打开音频文件
with open('audio_file.wav', 'rb') as audio_file:
    # 调用Speech to Text服务进行转换
    response = speech_to_text.recognize(
        audio=audio_file,
        content_type='audio/wav'
    ).get_result()

# 提取转换后的文本结果
transcript = response['results'][0]['alternatives'][0]['transcript']
print(transcript)