Python: Howto launch a full process not a child process and retrieve the PID

Question

I would like:

1. Launch a new process (myexe.exe arg1) from my process (myexe.exe arg0)
2. Retrieve the PID of this new process (os windows)
3. when I

Answer 1

I did similar a couple of years ago on windows and my issue was wanting to kill the child process.

I presume you can run the subprocess using pid = Popen(["/bin/mycmd", "myarg"]).pid so I'm unsure what the real issue is, so I'm guessing it's when you kill the main process.

IIRC it was something to do with the flags.

I can't prove it as I'm not running Windows.

subprocess.CREATE_NEW_CONSOLE
The new process has a new console, instead of inheriting its parent’s console (the default).

This flag is always set when Popen is created with shell=True.

subprocess.CREATE_NEW_PROCESS_GROUP
A Popen creationflags parameter to specify that a new process group will be created. This flag is necessary for using os.kill() on the subprocess.

This flag is ignored if CREATE_NEW_CONSOLE is specified.