python --curl重定向到文件范例

import sys
import os
import subprocess
import time

start = time.time()
f=open(‘data.log‘,‘a‘)
sys.stdout=f
p = subprocess.Popen((‘/bin/sh‘,‘-c‘,‘curl www.baidu.com -o /dev/null‘),  stdout=sys.stdout, stderr=subprocess.STDOUT)while 1:
    end=time.time()
    #print end-start
    if end-start>30:
        p.terminate()
        break
    time.sleep(1)
print "popen.pid:%s,exit successful"%p.pid
f.close()