Get environment variables in a cloud function

Question

I have a Cloud Function in GCP that queries BigQuery in a specific project/environment. As I have multiple environments I would like to get the current project/environment of the cloud function. This is so that I can access BigQuery in the corresponding environment. Of course I could just hardcode the project_id, but I would like to do this programmatically.

According to Google environment variables are set automatically. But when I try to access those I cannot find any of them.

For instance I have tried the following, which gives me none of the env. var listed by Google.

print(os.environ)

Anyone managed to access environment variables at runtime?

Answer 1

Those environment variables you are referring to only applies to python 3.7, the second section on that page (https://cloud.google.com/functions/docs/env-var#nodejs_10_and_subsequent_runtimes) states :

All languages and runtimes other than those mentioned in the previous section will use this more limited set of predefined environment variables.

This means the GCP_PROJECT is no longer set with 3.8 (at least for now).

Answer 2

For Python 3.8 there is a workaround:

import google.auth

_, project_id = google.auth.default()
print(project_id)

Answer 3

This is working fine

import os
os.environ.get('GCP_PROJECT')