Python2.x设置命令执行的超时时间

import subprocess
from threading import Timer


def call(args, timeout):
    p = subprocess.Popen(args, stdout=subprocess.PIPE, stderr=subprocess.PIPE)

    timer = Timer(timeout, lambda process: process.kill(), [p])

    try:
        timer.start()
        stdout, stderr = p.communicate()
        return_code = p.returncode
        return (stdout, stderr, return_code)
    finally:
        timer.cancel()

print call(['hostname'], 2)
print call(['ping', 'www.baidu.com'], 2)