python - 试图在谷歌云中查找已部署的 python 函数的当前项目 ID 会出错

Question

我已经在谷歌云中部署了一个 python 3.7 函数。我需要通过代码获取 project-id 以找出它的部署位置。
我写了一个小的python 3.7脚本并通过google shell命令行对其进行测试

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。虽然我已经使用了它，但我没有得到项目 ID

gcloud config set project my-project

任何人都可以帮忙，因为我是谷歌云和 python 的新手吗？谢谢。
这是下面的附加问题:
问题 2:
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

我从上面的行中收到此异常:

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

The below changes as suggested by the answer also gives me empty string

Answer 1

在 Python 3.7 运行时中，you can get the project ID via an environment variable :

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

在 future 的运行时中， this environment variable will be unavailable ，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()

在本地运行这个会产生一个错误，因为你的本地机器无法解析 http://metadata.google.internal URL - 这仅适用于已部署的功能。