#!/usr/bin/python
# -*- coding: utf-8
import os
status = os.system("ps aux |grep Xcode |grep -v grep")
print status

#整份字符串处理
p=os.popen('ps aux |grep Xcode |grep -v grep') 
res=p.read()
print res,type(res)
p.close()

#多行处理
p=os.popen('ps aux |grep Xcode |grep -v grep') 
res1=p.readlines()
for line in res1:
  print 'line :'+line
p.close()

import commands
status, output = commands.getstatusoutput('ps aux |grep Xcode |grep -v grep')
print output
output_list = output.splitlines()
print output_list