Python基础4 装饰器
# -*- 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)
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