如何修复“google.api_核心.异常服务不可用：503 Connect Failed“当连接到Google cloud API时”

Question

我想使用GOOGLE vision API，但我得到了错误'google.api_核心.异常服务不可用：503连接失败'。在

当连接到googlevisionapi时，我得到了503错误，我已经一步一步地遵循了说明。链接如下： https://cloud.google.com/vision/docs/quickstart-client-libraries

我下载我的密钥文件（json格式）并确保API已启用操作系统环境['GOOGLE_APPLICATION_CREDENTIALS']=r“/Users/a529157492/Desktop/APPLICATION\u default_CREDENTIALS 2.json” 直接在代码里。在

但是，我仍然得到错误代码。在

import io
import os


from google.cloud import vision
from google.cloud.vision import types
from google.oauth2 import service_account



os.environ['GOOGLE_APPLICATION_CREDENTIALS'] = 
r"/Users/a529157492/Desktop/application_default_credentials 2.json"
client = vision.ImageAnnotatorClient()


file_name = os.path.abspath(r'/Users/a529157492/Desktop/demo-img.jpg')


with io.open(file_name, 'rb') as image_file:
   content = image_file.read()

image = types.Image(content=content)


response = client.label_detection(image=image)
labels = response.label_annotations

print('Labels:')[enter image description here][1]
for label in labels:
    print(label.description)

但是，我得到了以下错误：

^{pr2}$