python subprocess模块 监控子进程的2种方式 忙等待和立即返回同时设置子进程超时

下面的资料是关于python subprocess模块 监控子进程的2种方式 忙等待和立即返回同时设置子进程超时时间的代码。

import subprocess import os import time tt = '555' cmd = "python /home/100003/python/mypython/sub2.py "+" 333"+" 444 "+tt print time.time() sub2 = subprocess.Popen(cmd, shell=True) while 1: ret1 = subprocess.Popen.poll(sub2) if ret1 == 0: print sub2.pid,'end' break elif ret1 is None: print 'running' time.sleep(1) else: print sub2.pid,'term' break print time.time() 二:子进程结束立即返回使用select模块同时可设置子进程的超时时间 import subprocess import select import time import signal import os tt = '555' cmd = "python /home/100003/python/mypython/sub2.py "+" 333"+" 444 "+tt timeout = 3 pro = subprocess.Popen(cmd, stdout=subprocess.PIPE,shell = True) print time.time() while 1: while_begin = time.time() print 'timeout',timeout fs = select.select([pro.stdout], [], [], timeout) if pro.stdout in fs[0]: tmp = pro.stdout.read() print 'read', tmp if not tmp: print 'end' print time.time() break else: print 'outoftime' print os.kill(pro.pid, signal.SIGKILL), break timeout = timeout - (time.time() - while_begin)