Disable import sorting for virtualenv

Environment data

• VS Code version: 1.49.2
• Extension version (available under the Extensions sidebar): 2020.9.111407
• OS and version: macOS 10.15.6
• Type of virtual environment used: poetry
• Value of the python.languageServer setting: Pylance

Expected behaviour

isort shouldn’t run. Because the extension passes file contents via stdin, isort can’t know whether the file should be ignored: https://github.com/PyCQA/isort/issues/1500

More generally, it’s counterintuitive that 3rd party files are treated the same as project files. These files are sometimes viewed or edited to aid in debugging, but that shouldn’t trigger formatting, import sorting, etc.

Actual behaviour

isort is run.

Output pane:

> <...>/.venv/bin/isort - --diff
cwd: <...>/.venv/lib/python3.8/site-packages/<package>

Steps to reproduce:

1. Open a file in the project’s virtualenv site-packages directory and save it.

[alexreg]

@elpablete Yep, it’s a bit odd… definitely a hack, but it works. Hopefully the authors of vscode-python will add a proper solution soon.

[elpablete]

Thanks for the class. That true seemed weird to me so it is cool to actually learn what it means.