Visual Studio Code - How to add multiple paths to python path?

I am experimenting with Visual Studio Code and so far, it seems great (light, fast, etc).

I am trying to get one of my Python apps running that uses a virtual environment, but also uses libraries that are not in the site-package of my virtual environment.

I know that in settings.json, I can specify a python.pythonPath setting, which I have done and is pointing to a virtual environment.

I also know that I can add additional paths to python.autoComplete.extraPaths, where thus far I am adding the external libraries. The problem is, when I am debugging, it's failing because it's not finding the libraries specified in python.autoComplete.extraPaths.

Is there another setting that must be used for this?

This worked for me:-

in your launch.json profile entry, specify a new entry called "env", and set PYTHONPATH yourself.

"configurations": [
    {
        "name": "Python",
        "type": "python",
        "stopOnEntry": false,
        "request": "launch",
        "pythonPath": "${config.python.pythonPath}",
        "program": "${file}",
        "cwd": "${workspaceRoot}",
        "debugOptions": [
            "WaitOnAbnormalExit",
            "WaitOnNormalExit",
            "RedirectOutput"
        ],
        "env": {
            "PYTHONPATH": "/path/a:path/b"
        }
    }
]