Process closing

Question

can I use Popen from python subprocess to close started process? For example, from popen I run some application. In some part of my code I have to close that ran app. For example, from console in Linux I do:

./some_bin
... It works and logs stdout here ...
Ctrl + C and it breaks

I need something like Ctrl + C but in my program code.

Answer 1

Use the subprocess module.

import subprocess

# all arguments must be passed one at a time inside a list
# they must all be string elements
arguments = ["sleep", "3600"] # first argument is the program's name

process = subprocess.Popen(arguments)
# do whatever you want
process.terminate()

Answer 2

from subprocess import Popen
process = Popen(['slow', 'running', 'program'])
while process.poll():
    if raw_input() == 'Kill':
        if process.poll(): process.kill()

kill() will kill a process. See more here: Python subprocess module

Answer 3

Some time ago I needed a 'gentle' shutdown for a process by sending CTRL+C in Windows console.

Here's what I have:

import win32api
import win32con
import subprocess
import time
import shlex

cmdline = 'cmd.exe /k "timeout 60"'
args = shlex.split(cmdline)
myprocess = subprocess.Popen(args)
pid = myprocess.pid
print(myprocess, pid)
time.sleep(5)
win32api.GenerateConsoleCtrlEvent(win32con.CTRL_C_EVENT, pid)
# ^^^^^^^^^^^^^^^^^^^^  instead of myprocess.terminate()