Can I load environment variables set in a python file to a bash script?

I am trying to access constants set in a python file from a bash script. The constants will be accessed by both python files and bash scripts. At first I thought to just set the variables in python like:

import os
...
constant_variable=1
constant_path='/path/to/file'

etc...

and then

source constants_file.py

in the bash script.

but I have been told to set these constants as environmental variables in python instead as the python file will likely include stuff that I don't want to load into bash using "source" in the future.

I have tried doing something like this in python...

os.environ['CONSTANT_VARIABLE'] = '1'
...

constant_variable = int(os.environ.get('CONSTANT_VARIABLE'))

and then accessing it in bash like so...

constant_variable=${CONSTANT_VARIABLE}

which does not work because I am no longer using source to read in the constants from the python file...

I don't know if this is even possible, but is there some way to just import env variables created by the python file without sourcing the whole file? Or am I way off base here?

Thanks!