如何将凭据添加到Google文本到语音API？

Question

我是Python的新手。我想使用谷歌的文本到语音API，因为我使用下面的代码，但由于错误，我无法访问API。这是代码，

def synthesize_text(text):
    """Synthesizes speech from the input string of text."""
    from google.cloud import texttospeech
    client = texttospeech.TextToSpeechClient()

    input_text = texttospeech.types.SynthesisInput(text=text)

    # Note: the voice can also be specified by name.
    # Names of voices can be retrieved with client.list_voices().
    voice = texttospeech.types.VoiceSelectionParams(
        language_code='en-US',
        ssml_gender=texttospeech.enums.SsmlVoiceGender.FEMALE)

    audio_config = texttospeech.types.AudioConfig(
        audio_encoding=texttospeech.enums.AudioEncoding.MP3)

    response = client.synthesize_speech(input_text, voice, audio_config)

    # The response's audio_content is binary.
    with open('output.mp3', 'wb') as out:
        out.write(response.audio_content)
        print('Audio content written to file "output.mp3"')

这是错误，

google.auth.exceptions.DefaultCredentialsError: Could not automatically determine credentials. Please set GOOGLE_APPLICATION_CREDENTIALS or
explicitly create credential and re-run the application. For more
information, please see
https://developers.google.com/accounts/docs/application-default-credentials.

我已经拥有凭据JSON文件，但我无法配置代码来验证我的请求。请帮忙！

Answer 1

你可以尝试这段代码：

from google.oauth2 import service_account

credentials = service_account.Credentials.from_service_account_file('yourkey.json')

texttospeech.TextToSpeechClient(credentials=credentials)

Answer 2

您可以通过不同方式验证您的Google凭据。一种是通过设置OS环境而另一种是在您发起请求时进行身份验证。

我建议用oauth2client库进行python验证。除此之外，请参阅我在Github上的例子（Link）。

Answer 3

有两种方式：

1方式：如果您使用Json文件，那么最好将json路径设置为环境变量，如果您这样做，那么您不需要设置编码它将自动从那里获得许可

GOOGLE_APPLICATION_CREDENTIALS=[path]

2种方法 ：

我有Java代码，我不知道python，所以你可以从这里得到的想法：

String jsonPath = "file.json"; 
 CredentialsProvider credentialsProvider = FixedCredentialsProvider.create(ServiceAccountCredentials.fromStream(new FileInputStream(jsonPath)));
TextToSpeechSettings settings = TextToSpeechSettings.newBuilder().setCredentialsProvider(credentialsProvider).build();
    Instantiates a client
TextToSpeechClient textToSpeechClient = TextToSpeechClient.create(settings)