如何在 python 中使用同一 shell 中的脚本导出环境变量？

Question

My django project fetches credentials from environment variables, now I want to automate this process and store the credentials in the vault(hashivcorp). I have a python and shell script which fetches data from an API and exports it as environment variables, when I run it using os.system command it runs the shell script but as it runs it in a subprocess, I can't access the variables in the main(parent) process/shell. Only way of doing it by inserting the shell script in the settings.py file. Is there any way I can do it so that I get those in the main process? Ps: I did try sourcing, os.system didn't recognise it as a command.

Here's the code I'm running:

import os

os.environ['ENV'] = 'Demo'
os.system('python3 /home/rishabh/export.py')

print(os.environ.get('RDS_DB_NAME'))

output:

None

the python file, shell script works just fine.

Answer 1

One way to do it is to run export.py in the same process, as user1934428 suggested:

import os
import sys

os.environ['ENV'] = 'Demo'

sys.path.append('/home/rishabh/')
import export   # runs export.py in the same process

print(os.environ.get('RDS_DB_NAME'))

This assumes there are no __name__ == '__main__' checks inside export.py .

You only need the sys.path line if export.py is in a different directory than your current script.