Python devcontainer won't initialize venv

[Jason Walker (raginjason)]

I am trying to get a Python devcontainer running with venv. I have a repo located at https://github.com/raginjason/vscode-devcontainer-python-venv, and while it mostly works, any terminals don't seem to honor the venv. My understanding is that any .venv directory under the project should be picked up automatically, but that does not seem to be the case. While I don't think I should need to mess with postCreateCommand and postAttachCommand, I have done so here in an attempt to get things working. This does not seem to help though.

Any thoughts?

[Christof Marti (chrmarti)]

Eleanor Boyd (@eleanorjboyd) Should the Python extension automatically activate the venv? I see this enabled by default:

[Eleanor Boyd (eleanorjboyd)]

looping in Karthik Nadig (@karthiknadig) as he is the expert on environment activation, thanks

[Karthik Nadig (karthiknadig)]

Jason Walker (@raginjason) What do you see in the logs? There should be some indication of what is happening with auto-selection in the Output > Python logs.

[Jason Walker (raginjason)]

2025-02-04 15:46:01.989 [info] Experiment 'pythonaacf' is active
2025-02-04 15:46:01.989 [info] Experiment 'pythonRecommendTensorboardExt' is active
2025-02-04 15:46:01.990 [info] Experiment 'pythonTerminalEnvVarActivation' is active
2025-02-04 15:46:01.990 [info] Experiment 'pythonTestAdapter' is active
2025-02-04 15:46:01.990 [info] Native locator: Refresh started
2025-02-04 15:46:01.990 [info] Native locator: Refresh started
2025-02-04 15:46:01.990 [info] Native locator: Refresh started
2025-02-04 15:46:02.000 [info] Python interpreter path: /usr/local/bin/python
2025-02-04 15:46:02.262 [info] Native locator: Refresh finished in 449 ms
2025-02-04 15:46:02.318 [info] > pyenv which python
2025-02-04 15:46:02.318 [info] cwd: .
2025-02-04 15:46:04.359 [info] Starting Pylance language server.
2025-02-04 15:46:24.673 [info] Discover tests for workspace name: vscode-devcontainer-python-venv - uri: /workspaces/vscode-devcontainer-python-venv/.venv/lib/python3.9/site-packages/numpy/f2py/setup.cfg
2025-02-04 15:46:50.310 [info] Discover tests for workspace name: vscode-devcontainer-python-venv - uri: /workspaces/vscode-devcontainer-python-venv/.venv/lib/python3.9/site-packages/pandas/pyproject.toml
2025-02-04 15:47:07.997 [info] Discover tests for workspace name: vscode-devcontainer-python-venv - uri: /workspaces/vscode-devcontainer-python-venv/.venv/lib/python3.9/site-packages/databricks/sqlalchemy/setup.cfg
2025-02-04 15:47:08.164 [info] Running installed packages checker:  {
  id: '/usr/local/bin/python',
  sysPrefix: '/usr/local',
  envType: 'System',
  envName: '',
  envPath: '/usr/local/bin/python',
  path: '/usr/local/bin/python',
  architecture: 3,
  sysVersion: '',
  version: {
    raw: '3.9.17',
    major: 3,
    minor: 9,
    patch: 17,
    build: [],
    prerelease: []
  },
  displayName: 'Python 3.9.17',
  detailedDisplayName: 'Python 3.9.17',
  type: undefined
} /home/vscode/.vscode-server/extensions/ms-python.python-2024.22.2-linux-arm64/python_files/installed_check.py /workspaces/vscode-devcontainer-python-venv/requirements.txt
2025-02-04 15:47:08.164 [info] > /usr/local/bin/python ~/.vscode-server/extensions/ms-python.python-2024.22.2-linux-arm64/python_files/installed_check.py ./requirements.txt

Some output from terminal:

vscode ➜ /workspaces/vscode-devcontainer-python-venv (main) $ which python
/usr/local/bin/python
vscode ➜ /workspaces/vscode-devcontainer-python-venv (main) $ . .venv/bin/activate
(.venv) vscode ➜ /workspaces/vscode-devcontainer-python-venv (main) $ which python
/workspaces/vscode-devcontainer-python-venv/.venv/bin/python
(.venv) vscode ➜ /workspaces/vscode-devcontainer-python-venv (main) $ 

[Karthik Nadig (karthiknadig)]

Jason Walker (@raginjason) Can you also share logs from Output > Python locator?