How to enable using launch.json

[Zhaoyilunnn]

Hello,

Thanks for the great project.

I'm working on a python project, with a .vscode/launch.json in the project root, with justMyCode setting to false because I'd like to stepping into an external library

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "Python Debugger Configuration",
      "type": "debugpy",
      "request": "launch",
      "justMyCode": false
    }
  ]
}

However, after launching the debugger, I still cannot step into the code of otherl libraries, with a warning message

Frame skipped from debugging during step-in.
Note: may have been skipped because of "justMyCode" option (default == true). Try setting "justMyCode": false in the debug configuration (e.g., launch.json).

My question is: How do I know whether the launch.json is loaded or not? So that I can understand if this is a mis-configuration or a limitation of debugpy

Thanks in advance