google.auth.exceptions.DefaultCredentialsError:

Question

因此，我完全按照 Google Translate API 的文档执行相同的过程。

其中提供了以下代码。

# Imports the Google Cloud client library

from google.cloud import translate

# Instantiates a client
translate_client = translate.Client()

# The text to translate
text = u'Hello, world!'
# The target language
target = 'ru'

# Translates some text into Russian
translation = translate_client.translate(
    text,
    target_language=target)

print(u'Text: {}'.format(text))
print(u'Translation: {}'.format(translation['translatedText']))

现在，当我运行它时，返回以下错误：

Traceback (most recent call last):   File "test.py", line 5, in <module>
    translate_client = translate.Client()   File "C:\ProgramData\Anaconda3\lib\site-packages\google\cloud\translate_v2\client.py", line 65, in __init__
    super(Client, self).__init__(credentials=credentials, _http=_http)   File "C:\ProgramData\Anaconda3\lib\site-packages\google\cloud\client.py", line 129, in __init__
    credentials, _ = google.auth.default()   File "C:\ProgramData\Anaconda3\lib\site-packages\google\auth\_default.py", line 294, in default
    credentials, project_id = checker()   File "C:\ProgramData\Anaconda3\lib\site-packages\google\auth\_default.py", line 165, in _get_explicit_environ_credentials
    os.environ[environment_vars.CREDENTIALS])   File "C:\ProgramData\Anaconda3\lib\site-packages\google\auth\_default.py", line 89, in _load_credentials_from_file
    'File {} was not found.'.format(filename)) google.auth.exceptions.DefaultCredentialsError: File  D:\Summer Projects\Translate\social media analysis-2a59d94ba22d.json was not found.

D:\Summer Projects\Translate\social media analysis-2a59d94ba22d.json是我放置 Google Cloud 为该项目提供的密钥的路径。

我该如何解决这个问题？

Answer 1

您需要为GOOGLE_APPLICATION_CREDENTIALS设置环境变量

您可以通过添加以下行将其添加到您的代码中：

credential_path = "D:\Summer Projects\Translate\social media analysis-2a59d94ba22d.json"
os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = credential_path

完整的解决方案：

# Imports the Google Cloud client library

import os    
from google.cloud import translate

credential_path = "D:\Summer Projects\Translate\social media analysis-2a59d94ba22d.json"
os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = credential_path

# Instantiates a client
translate_client = translate.Client()

# The text to translate
text = u'Hello, world!'
# The target language
target = 'ru'

# Translates some text into Russian
translation = translate_client.translate(
    text,
    target_language=target)

print(u'Text: {}'.format(text))
print(u'Translation: {}'.format(translation['translatedText']))

Answer 2

我现在正在处理视觉 API。 我的解决方案取决于上面的答案。

但是来自 google 的示例代码与之前的代码有点不同。

对于我的示例代码是

def run_quickstart():
    import os
    import io
    from google.cloud import vision
    from google.cloud.vision import types
    ...

    # I made the modification here
    credential_path = "PATH"

    # for example
    # credential_path = "projectname-xxxxxxxx.json"

    # WRONG code
    # credential_path = "~/Downloads/projectname-xxxxxxxx.json"


    os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = credential_path

需要注意的事情是我把JSON文件放到了与.py相同的文件夹中
所以PATH实际上并不是指向 JSON 文件的真实路径
它只是转到 JSON 文件的名称，就像这个projectname-xxxxxxxx.json

Answer 3

如果您在 linux 上工作，只需将其放入您的 python 代码中：

os.environ["GOOGLE_APPLICATION_CREDENTIALS"] = "./Authentication.json"

Answer 4

如果从命令提示符设置：

SET GOOGLE_APPLICATION_CREDENTIALS=C:\work\xxxba6.json 

注意：不要在路径“C:\work\xxxba6.json”中加上引号。

Google Python 脚本无法处理。