python使用装饰器和线程函数执行时间的方法

# -*- coding: utf-8 -*-
from threading import Thread
import time
class TimeoutException(Exception):
 pass
ThreadStop = Thread._Thread__stop#获取私有函数
def timelimited(timeout):
 def decorator(function):
 def decorator2(*args,**kwargs):
 class TimeLimited(Thread):
 def __init__(self,_error= None,):
 Thread.__init__(self)
 self._error = _error
 def run(self):
 try:
 self.result = function(*args,**kwargs)
 except Exception,e:
 self._error =e
 def _stop(self):
 if self.isAlive():
 ThreadStop(self)
 t = TimeLimited()
 t.start()
 t.join(timeout)
 if isinstance(t._error,TimeoutException):
 t._stop()
 raise TimeoutException('timeout for %s' % (repr(function)))
 if t.isAlive():
 t._stop()
 raise TimeoutException('timeout for %s' % (repr(function)))
 if t._error is None:
 return t.result
 return decorator2
 return decorator
@timelimited(2)
def fn_1(secs):
 time.sleep(secs)
 return 'Finished'
if __name__ == "__main__":
 print fn_1(4)