stop subthread example with Event

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Background

Python threading模块不同于其他语言之处在于它没有提供线程的终止方法，通过Python threading.Thread()启动的线程彼此是独立的，启动了线程B，B是独立运行的线程。若想终止线程的同时强力终止线程B，更为妥当的方式是通过Event机制， 线程中的资源（打开的文件、数据传输等）可正确的释放。

code

#-*-coding:utf-8-*-import threading  import time class mythread(threading.Thread):      def __init__(self,stopevt = None,File=None,name = 'subthread',Type ='event'):          threading.Thread.__init__(self)          self.stopevt = stopevt          self.name = name          self.File = File          self.Type = Type      def Eventrun(self):          while not self.stopevt.isSet():              print self.name +' alive eeee\n'              #time.sleep(2)          print "I am here, stupid !"        if self.File:              print 'close opened file in '+self.name'\n'              self.File.close()          print self.name +' stoped  eeee\n'      def run(self):          self.Eventrun()def eventstop():      stopevt = threading.Event()      FileA = open('testA.txt','w')      A = mythread(stopevt,FileA,'subthreadA')      print repr(threading.currentThread())+'alive\n'      print FileA.name + ' closed? '+repr(FileA.closed)+'\n'      A.start()      print repr(threading.currentThread())+'send stop signal\n'      #time.sleep(1)    stopevt.set()      A.join()      print  repr(threading.currentThread())+'stoped\n'      print 'after A stoped, '+FileA.name + ' closed? '+repr(FileA.closed)+'\n'  if __name__ =='__main__':      print '-------stop subthread example with Event:----------\n'      eventstop()

Test result :

-------stop subthread example with Event:----------

<_MainThread(MainThread, started 140735271691008)>alive

testA.txt closed? False

subthreadA alive eeee

subthreadA alive eeee
<_MainThread(MainThread, started 140735271691008)>send stop signal

I am here, stupid !
close opened file in subthreadA

subthreadA stoped eeee

<_MainThread(MainThread, started 140735271691008)>stoped

after A stoped, testA.txt closed? True

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