[Python] VS Code debugger launch intermittently stops working and then does work again (Python...

I have a Python script which works on the command line. It also does work via VS Code's debug launch ... sometimes.

At first I thought it was to do with a bad launch.json, in particular related to how I was inject Env variables using

//"envFile": "${workspaceFolder}/.env"


While the script itself uses load_dotenv() to achieve the same thing from the command line.

But I don't think it's that, because then it started working again, after making an edit to the script and then reverting that edit - ie, no actual change except I touched the .py file.

But "not working", I mean that this happens (see screenshot) and the script never even gets to launch.



I don't think it's the launch config:

{
"version": "0.2.0",
"configurations": [
{
"name": "my-script",
"type": "debugpy",
"request": "launch",
"program": "${workspaceFolder}/scripts/my-script.py",
"console": "integratedTerminal",
"args": ["arg"],
"python": "${workspaceFolder}/.venv/bin/python"
//"envFile": "${workspaceFolder}/.env"
}
]
}


Also, how the script picks up its env:

def main():
#dotenv_path=Path(__file__).parent.parent / ".env"
#print(f"Loading ENV from: {dotenv_path}")
#load_dotenv(dotenv_path)
# This works, and so does the above, from cmd line
# Both have worked in VS Code debugger, but something else breaks it
load_dotenv()


I suspect I'm doing something to fix / break it, but I can't pin down by experiment what it is.

OS: MacBook Pro Sequoia 15.1

Continue reading...