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查看函数的执行时间：

[root@node110 decorator]# cat exec_time.py

#!/usr/bin/env python

import time

def sayhi():

  start=time.time()

  print 'hi yoursister...'

  time.sleep(0.1)

  end= time.time()

  print 'Thisfunction costs:',end-start

 

sayhi()