.env file evaluation appends original string

Possibly 2 issues? When using a .env file, a value placed in the form of:

PYTHONPATH=$PYTHONPATH:$PWD/django/project:$PWD/django/project/vendor

Does not evaluate the variables. It sets it literally not the evaluated version.

>>> import os
>>> os.environ['PYTHONPATH']
'${PYTHONPATH}:${PWD}/django/project:${PWD}/django/project/vendor'

When specifying the values as:

PYTHONPATH=${PYTHONPATH}:${PWD}/django/project:${PWD}/django/project/vendor

PWD and PYTHONPATH are evaluated, but the original string is still prepended, leaving something like this as the final value that is set as the value of PYTHONPATH

>>> import os
>>> os.environ['PYTHONPATH']
'${PYTHONPATH}:${PWD}/django/project:${PWD}/django/project/vendor:/Users/aventurella/github/my_repo/django/project:/Users/aventurella/github/my_repo/django/project/vendor'

[matthiasLevy]

Thanks ! It is not my favorite option, but does the job perfectly. Regards, M.

[matthiasLevy]

This is very interesting. Thanks again, it will certainly bu useful soon.