Launch pdf and close on delete window event

[woooee]

There is something it doesn't like about the pid and I don't know where the pid is coming from. Because we use what we know, I use multiprocessing (example below) because I know multiprocessing works, and because multiprocessing will use multiple cores when available, so try modifying this code to fit you, and see if it works any better, and obviously post back if it doesn't.

## very basic and simple but should do the trick

import multiprocessing
import os
import psutil
import time


def killtree(pid, including_parent=True):
    parent = psutil.Process(pid)
    for child in parent.children(recursive=True):
        print("killing child", child)
        child.kill()
    if including_parent:
        parent.kill()

def print_numbers(spaces):
    ctr = 0
    for x in range(11):
        ctr +=1
        print(" "*spaces, ctr)
        time.sleep(0.5)

## do this first as it gets the latest pid started
## should be the pid of this program
## if you wait and the OS starts another process, you wil get that pid
pid=os.getpid()

list_of_multis=[]
for ctr in range(5):
    list_of_multis.append(multiprocessing.Process(target=print_numbers, args=(ctr,)))
    list_of_multis[-1].start()

## wait 2 seconds and kill all processes
time.sleep(2)
killtree(pid) 

---

And I got so caught up in psutil that I didn't post terminating each process. This is better than psutil because you can join() each process, which allows anything in the background to be cleaned up.

import multiprocessing
import time

def print_numbers(spaces):
    ctr = 0
    for x in range(11):
        ctr +=1
        print(" "*spaces, ctr)
        time.sleep(0.5)

list_of_multis=[]
for ctr in range(5):
    list_of_multis.append(multiprocessing.Process(target=print_numbers, args=(ctr,)))
    list_of_multis[-1].start()

## wait 2 seconds and kill all processes
time.sleep(2)
for process in list_of_multis:
    process.terminate()
    process.join()
    print(process, "terminated")