Python Debugger panel shows subprocess PIDs in non-sequential or random order

[BitCalSaul]

🐛 Description

When debugging a Python program that spawns multiple subprocesses (for example, via multiprocessing or subprocess), the Python Debugger panel in VS Code displays all the process PIDs, but they are not listed in a logical or numerical order.

This makes it confusing to identify which PID corresponds to which child process — especially when processes are frequently spawned and terminated during runtime.

💡 Expected Behavior

The debugger panel should display the process list sorted by PID (ascending) or at least in a consistent, deterministic order — e.g., parent process first, followed by subprocesses.

🧩 Actual Behavior

Process PIDs appear in seemingly random order in the panel each time a new process attaches.

The version is Python Debugger extension (ms-python.debugpy) | 2025.14.1

[rchiodo]

I believe this is controlled by VS code. At least debugpy would have no control over the sort order. It simply returns a list of processes and thread ids:

This is the message we return to VS code:
https://microsoft.github.io/debug-adapter-protocol/specification#Events_Process