# -*- coding: UTF-8 -*-

import subprocess
import os
import time

# fd 0继承
fd_null = os.open("/dev/null", os.O_RDWR)
if fd_null != 0:
    os.close(0)
    os.dup2(fd_null,0)
    
subprocess.call(["sleep", "12345"])
time.sleep(1234)