Activate venv on a per file/folder basis

[thomelane]

I'm currently working in a monorepo that contains multiple Python packages and venvs. e.g.

monorepo/
├── package_a
│   ├── .venv
│   └── main_a.py
└── package_b
    ├── .venv
    └── main_b.py

It would be great to have VSCode automatically change the venv based on the current file, so that things like linting work correctly (i.e. no package import errors). As an example:

• main_a.py is opened and is active file -> package_a/.venv gets activated.
• change tab to make main_b.py the active file -> package_b/.venv gets activated.

Working out which is the correct venv for each file could be tricky, but for me a traversal up the file system looking for .venv would work well. WolfiesHorizon.python-auto-venv extension used to do this well but no longer works. Would be great to have this feature in the official extension.

My current workflow every time I open a file from a different sub-packages is:

• open file
• copy path to .venv (for that file's package)
• select interpreter
• "enter interpreter path"
• paste in .venv path

So a very manual workflow and pretty disruptive! I copy path because I have a lot of venvs, and it's easier than finding the correct venv from the existing interpreter drop down.

Sorry if this is a duplicate issue, quite hard to search for this one!

[luabud]

hey @thomelane! If you open your project as a multi-root workspace in VS Code this should work automatically. We have some documentation in our wiki page with some steps on how to configure it for Python: https://github.com/microsoft/vscode-python/wiki/Mono-Repo-Set%E2%80%90up-Guide#scenario-2-separate-virtual-environments

However if multi-root workspaces don't work for you, one possible workaround is to use the Python Environment Manager extension . It shows you a view of your environments and gives you a way to switch between them as the selected interpreter:

We have been tracking feedback regarding how we can improve the mono repo experience at #21204, so I'm going to close this one in favour of that!