Running multiple shell processes

Question

I am trying to use python to run a command on several separate terminal instances at the same time. What is the best way to do this? Right now I'm trying to use the subprocess module with popen, which works for one command, but not several.

Thanks in advance.

Edit:

That's what I'm doing:

from subprocess import*

Popen('ant -Dport='+str(5555)+ ' -Dhost='+GetIP()+ ' -DhubURL=http://192.168.1.113:4444 -Denvironment=*firefox launch-remote-control $HOME/selenium-grid-1.0.8', shell=True)

The problem for me is starting a java process in the terminal, which I want to continue to work indefinitely. Secondly, I want to run a similar command several times in several different processes.

Answer 1

, . , thread

, :

class PopenThread(threading.Thread):

    def __init__(self, port):
        threading.Thread.__init__(self)
        self.port=port

    def run(self):
        Popen('ant -Dport='+str(self.port)+ ' -Dhost='+GetIP()+ 
                ' -DhubURL=http://192.168.1.113:4444' 
                ' -Denvironment=*firefox launch-remote-control'
                ' $HOME/selenium-grid-1.0.8', shell=True)

if '__main__'==__name__:
    PopenThread(5555).start()
    PopenThread(5556).start()
    PopenThread(5557).start()

EDIT: fork: fooobar.com/questions/1765895/... , , stdio.

Answer 2

, , , Python Popen script, :

gnome-terminal --window -e 'ant -Dport=5555 -Dhost=$IP1 -DhubURL=http://192.168.1.113:4444 -Denvironment=*firefox launch-remote-control $HOME/selenium-grid-1.0.8' &
disown
gnome-terminal --window -e 'ant -Dport=5555 -Dhost=$IP2 -DhubURL=http://192.168.1.113:4444 -Denvironment=*firefox launch-remote-control $HOME/selenium-grid-1.0.8' &
disown
# etc. ...

Python- , , Unix- , . , subprocess.Popen , , , , . " - ".

, Unix- , :

• fork
• fork
• grandchild - /dev/null exec , (, Popen )
• .
• , , , SIGCHLD, , .

, . , (&) disown ing bash .

Answer 3

. collection.deque , Twisted , . Crummy :

• .

season to taste!

import logging
basicConfig = dict(level=logging.INFO, format='%(process)s %(asctime)s %(lineno)s %(levelname)s %(name)s %(message)s')
logging.basicConfig(**basicConfig)
logger = logging.getLogger({"__main__":None}.get(__name__, __name__))

import subprocess

def wait_all(list_of_Popens,sleep_time):
    """ blocking wait for all jobs to return.

    Args:
        list_of_Popens. list of possibly opened jobs

    Returns:
        list_of_Popens. list of possibly opened jobs

    Side Effect:
        block until all jobs complete.
    """
    jobs = list_of_Popens
    while None in [j.returncode for j in jobs]:
        for j in jobs:  j.poll()
        logger.info("not all jobs complete, sleeping for %i", last_sleep)
        time.sleep(sleep_time)  

    return jobs


jobs = [subprocess.Popen('sleep 1'.split()) for x in range(10)]
jobs = wait_all(jobs)