Cannot debug Python modules via launch.vs.json #7675

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Visual Studio provides a way to debug Python programs, but fails to launch modules properly, so relative imports are failing. Consider this script (see attached project for a full example):

import sys

from ..util.abc import ABC      # requires -m mymod.app.app to run

def main() -> int:
    abc = ABC("ABC")

    print(f"abc: {str(abc)} args: {sys.argv}")

    return 0

if __name__ == "__main__":
    sys.exit(main())

This module can be debugged via VS Code using this launch.json:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "Python: Module",
            "type": "python",
            "request": "launch",
            "module": "mymod.app.app",
            "justMyCode": true
        }
    ]
}

However, Visual Studio provides no way to specify module debugging in launch.vs.json, so from ..util.abc import ABC always fails to import another module from the same package because the import uses a relative path, which requires app to have a top-level Python module.

Using "interpreterArguments": "-m mymod.app.app" just runs the module and fails to attach a debugger to app.py because all debugpy arguments are added after -m, so they are ignored.

module-test.zip

Original Comments

Feedback Bot on 6/29/2023, 06:19 PM:

(private comment, text removed)

Original Solutions

(no solutions)