Name process when creating it with python's subprocess.Popen()

Question

I am using python's subprocess.Popen() to run multiple subprocesses at a time. Each time a process is terminated, I want to print something like this to the shell: process ABC has been terminated ABC being a name that I give to the process myself. I thought maybe there is a way to achieve this using some code like this: process.name()

Is there a way to do that through subprocess.Popen()?

Answer 1

This is a textbook example of what you use inheritance for.

import subprocess

class NamedPopen(subprocess.Popen):
     """
     Like subprocess.Popen, but returns an object with a .name member
     """
     def __init__(self, *args, name=None, **kwargs):
         self.name = name
         super().__init__(*args, **kwargs)

fred = NamedPopen('sleep 11; echo "yabba dabba doo"', shell=True, name="fred")
barney = NamedPopen('sleep 22; echo "hee hee, okay fred"', name="barney", shell=True)
print('... stay tuned ...')
fred.wait()
barney.wait()

Just take care to not pick an attribute name which the parent class uses for something else.

Answer 2

There is no portable way to do so using subprocess, you could use another package in combination with it, you can check the https://github.com/dvarrazzo/py-setproctitle library.

Using that module you can name a process title, and then access to it and print the desired output easily.