Python: Not all environment variables present in os.environ

Question

In the python shell, using

import os print os.environ

prints the complete list of environment variables with nothing missing. However when I call the interpreter with a filename:

sudo python file.py

and use

import os print os.environ

I see that some of the environment variables are missing in the dict.

Why do they behave differently?

Operating system: Ubuntu 14.04

There is no such thing as a "complete" environment. Different variables will be present in different situations. What's missing, and why is it a problem? — tripleee
– tripleee, Commented Jul 26, 2016 at 6:46

storm_m2138 · Accepted Answer · 2018-09-27 20:58:23Z

4

I saw this happen when ENV Vars were not set using export in bash, so they were not propagating to the python script.

answered Sep 27, 2018 at 20:58

storm_m2138

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Comments

dominique · Accepted Answer · 2016-07-27 05:15:36Z

I realised that the difference was because I was using sudo during the execution for the second where the environment was not preserved. I need to add those environment variables to my sudoers file or preserve them during execution.

Charlie Parker · Accepted Answer · 2021-04-26 21:00:59Z

did you try using the export keyword e.g.

export DIR="$( cd "$( dirname "${BASH_SOURCE[0]}" )" &> /dev/null && pwd )"

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