Google 应用程序凭据有问题

Trouble with Google Application Credentials

您好,首先这是我第一次使用 Googles 服务。我正在尝试使用 Google AutoML Vision Api(自定义模型)开发应用程序。我已经构建了一个自定义模型并生成了 API 键(我希望我做对了)。

经过多次尝试通过 Ionics & Android 进行开发,但未能连接到 API。

我现在已经在 Python(在 Google Colab 上)中采用给定代码的预测建模,即使这样我仍然收到一条错误消息,指出无法自动确定凭据。我不确定我哪里出了问题。请帮忙。快死了。

#installing & importing libraries 

!pip3 install google-cloud-automl

import sys  

from google.cloud import automl_v1beta1
from google.cloud.automl_v1beta1.proto import service_pb2


#import key.json file generated by GOOGLE_APPLICATION_CREDENTIALS
from google.colab import files
credentials = files.upload()


#explicit function given by Google accounts 

[https://cloud.google.com/docs/authentication/production#auth-cloud-implicit-python][1]

def explicit():
from google.cloud import storage

# Explicitly use service account credentials by specifying the private key
# file.
storage_client = storage.Client.from_service_account_json(credentials)

# Make an authenticated API request
buckets = list(storage_client.list_buckets())
print(buckets)




#import image for prediction
from google.colab import files
YOUR_LOCAL_IMAGE_FILE = files.upload()


#prediction code from modelling
def get_prediction(content, project_id, model_id):
prediction_client = automl_v1beta1.PredictionServiceClient()

name = 'projects/{}/locations/uscentral1/models/{}'.format(project_id, 
        model_id)
payload = {'image': {'image_bytes': content }}
params = {}
request = prediction_client.predict(name, payload, params)
return request  # waits till request is returned

#print function substitute with values 
 content = YOUR_LOCAL_IMAGE_FILE
 project_id = "REDACTED_PROJECT_ID"
 model_id = "REDACTED_MODEL_ID"

 print (get_prediction(content, project_id,  model_id))

最后一行代码 运行 时的错误消息:

credentials = files.upload()
storage_client = storage.Client.from_service_account_json(credentials)

这两行是我认为的问题。 第一个实际上加载文件的内容,但第二个需要文件的路径,而不是内容。

让我们先处理第一行: 我看到仅传递调用 credentials = files.upload() 后获得的 credentials 将无法按照 the docs for it 中的说明工作。像你一样做,credentials 实际上并不直接包含文件的值,而是包含文件名和内容的字典。

假设您只上传 1 个凭据文件,您可以像这样获取文件的内容 (stolen from this SO answer):

from google.colab import files
uploaded = files.upload()
credentials_as_string = uploaded[uploaded.keys()[0]]

现在我们实际上已经将上传文件的内容作为字符串,下一步是从中创建一个实际的凭据对象。

This answer on Github 显示如何从转换为 json.

的字符串创建凭据对象
import json
from google.oauth2 import service_account

credentials_as_dict = json.loads(credentials_as_string)
credentials = service_account.Credentials.from_service_account_info(credentials_as_dict)

最后我们可以使用此凭据对象创建存储客户端对象:

storage_client = storage.Client(credentials=credentials)

请注意,我还没有对此进行测试,所以请试一试,看看它是否真的有效。