Using Alternate Python Versions

On Ubuntu 20.04 the stock python version are 3.8. This is the oldest version currently supported. OpenL2M is now developed and tested on Python 3.11

Alternate Python Installation

The details of installing an alternate version of Python are left to the user. We recommend you use Python 3.11 from the “Deadsnakes” PPA. The excercise of installing from source is left to the reader.

To install an alternative python version from package repositories, you will need the following parts:

python3.11 python3.11-dev python3.11-venv

OpenL2M Configuration

Find the full path to your new Python. Here we use v3.11:

which python3.11

Copy the file altpython.sh to the top level directory (where upgrade.sh is), and modify it to point the PYTHON variable to this alternate python:

cd /opt/openl2m
cp scripts/altpython.sh .
vi altpython.sh

Change this line to point to the proper python 3:

PYTHON="/usr/bin/python3.11"

Verify

Stop the services, and run the upgrade:

sudo systemctl stop openl2m
./upgrade.sh

This will recreate the virtual environment, and should not show any errors.

Now verify the version of python in the virtual environment:

source venv/bin/activate
which python3
python3 -V

This will activate the virtual environment, show the path to python (should be /opt/openl2m/venv/bin/python3), and the version (whatever you installed).

If this is all correct, you can restart the services, and should be good to go!

sudo systemctl start openl2m