如何在 Google Cloud 中查找已部署的 Python 函数的当前项目 ID 出现错误

我已经在 Google Cloud 中部署了 Python 3.7 函数。我需要通过代码获取project-id来找出它的部署位置。

我编写了一个小的Python 3.7脚本并通过Google shell命令行测试它

import urllib
import urllib.request
url="http://metadata.google.internal/computeMetadata/v1/project/project-id"
x=urllib.request.urlopen(url)
with x as response:
 x.read()

不幸的是这只给了我b''作为回应。尽管我已经使用它设置了项目ID，但我没有得到项目ID

gcloud config set project my-project

我是 Google Cloud 和 Python 的新手。

Issue 2

这是下面的一个附加问题：

在我的本地系统中，我已经安装了 gcloud，如果我从那里运行上面的 python3.7 脚本：

x=urllib.request.urlopen(url) #this line

我从上面的行中得到这个异常：

Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/urllib/request.py", line 1350, in do_open
    h.request(req.get_method(), req.selector, req.data, headers,
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1240, in request
    self._send_request(method, url, body, headers, encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1286, in _send_request
    self.endheaders(body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1235, in endheaders
    self._send_output(message_body, encode_chunked=encode_chunked)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 1006, in _send_output
    self.send(msg)
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 946, in send
    self.connect()
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/http/client.py", line 917, in connect
    self.sock = self._create_connection(
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/socket.py", line 787, in create_connection
    for res in getaddrinfo(host, port, 0, SOCK_STREAM):
  File "/Library/Frameworks/Python.framework/Versions/3.8/lib/python3.8/socket.py", line 918, in getaddrinfo
    for res in _socket.getaddrinfo(host, port, family, type, proto, flags):
socket.gaierror: [Errno 8] nodename nor servname provided, or not known

答案所建议的以下更改也给了我空字符串：

在 Python 3.7 运行时中，您可以通过环境变量获取项目ID https://cloud.google.com/functions/docs/env-var#nodejs_8_python_37_and_go_111:

import os
project_id = os.environ['GCP_PROJECT']

在未来的运行时间里，该环境变量将不可用 https://cloud.google.com/functions/docs/env-var#nodejs_10_and_subsequent_runtimes，您需要从元数据服务器获取项目 ID：

import urllib.request
url = "http://metadata.google.internal/computeMetadata/v1/project/project-id"
req = urllib.request.Request(url)
req.add_header("Metadata-Flavor", "Google")
project_id = urllib.request.urlopen(req).read().decode()

在本地运行此命令会产生错误，因为您的本地计算机无法解析http://metadata.google.internalURL——这仅适用于已部署的功能。