[Tutor] why "ifconfig" is alway running?

[Alan Gauld]

"lei yang" <yanglei.fage at gmail.com> wrote


def runForAWhile(cmd, secs=10):
    print("running %s" % cmd)
    timeout = datetime.timedelta(seconds=secs)
    print timeout
    proc = subprocess.Popen(cmd, stdout=subprocess.PIPE,
stderr=subprocess.STDOUT, shell=True)
    status = proc.poll()

You are still only checking status once outside the while loop.

    start = datetime.datetime.now()
    while (status is None and (datetime.datetime.now() - start) <
timeout): #not timed out
        print proc.stdout.readline() #TODO timestamp?
        #print status
        #print datetime.datetime.now() - start


> I see that "status" always "!=0“  why  program  is NOT exited


-- 
Alan Gauld
Author of the Learn to Program web site
http://www.alan-g.me.uk/