python定时检查某个进程是否已经关闭，python进程关闭,import threa

python定时检查某个进程是否已经关闭，python进程关闭,import threa

import threadingimport timeimport osimport subprocessdef get_process_count(imagename):    p = os.popen('tasklist /FI "IMAGENAME eq %s"' % imagename)    return p.read().count(imagename)def timer_start():    t = threading.Timer(120,watch_func,("is running..."))    t.start()def watch_func(msg):    print "I'm watch_func,",msg    if get_process_count('main.exe') == 0 :        print subprocess.Popen([r'D:\shuaji\bin\main.exe'])    timer_start()if __name__ == "__main__":    timer_start()    while True:        time.sleep(1)