【Python】多線程-1

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#練習：建立一個線程from threading import Threadimport timedef run(a = None, b = None) :  print a, b   time.sleep(1)t = Thread(target = run, name="wangjing",args = ("this is a", "thread"))#此時線程是建立狀態print t.getName() #獲得線程對象名稱print t.isAlive() #判斷線程是否還活著，在start後，在執行完畢前調用isAlive()才會返回Truet.start() #啟動線程#print t.isAlive()t.join()  #主線程等待子線程t執行結束print "done!"#練習：用繼承的方法建立線程from threading import Threadimport timeclass MyThread(Thread) :  def __init__(self, a) :    #調用父類的構造方法    super(MyThread, self).__init__()    self.a = a  def run(self) :    time.sleep(self.a)    print "sleep :", self.a t1 = MyThread(2)t2 = MyThread(4)#多線程的執行是沒有順序，本例主要是增加了較長的等待時間，才看起來有執行順序t1.start()t2.start()t1.join()t2.join()print "done!"#練習：線程import threading  import time  class timer(threading.Thread):     #The timer class is derived from the class threading.Thread    def __init__(self, num, interval):          threading.Thread.__init__(self)          self.thread_num = num          self.interval = interval          self.thread_stop = False      def run(self):         #Overwrite run() method, put what you want the thread do here          while not self.thread_stop:              print ‘Thread Object(%d), Time:%s\n‘ %(self.thread_num, time.ctime())              time.sleep(self.interval)      def stop(self):          self.thread_stop = True   def test():      thread1 = timer(1, 1)      thread2 = timer(2, 2)      thread1.start()  #執行類裡面的run方法    thread2.start()      time.sleep(10)  #這裡是主線程等待10秒    thread1.stop()      thread2.stop()  #停止線程  #這裡的停止是主線程調用的 if __name__ == ‘__main__‘:      test()#練習：線程中再啟動一個線程import threadingimport timedef context(tJoin):    print ‘in threadContext.‘    tJoin.start()    # 將阻塞tContext直到threadJoin終止    tJoin.join()    # tJoin終止後繼續執行    print ‘out threadContext.‘def join1():    print ‘in threadJoin.‘    time.sleep(1)    print ‘out threadJoin.‘if __name__=="__main__":    tJoin = threading.Thread(target = join1)    #將線程對象作為參數傳入另一個線程中    tContext = threading.Thread(target = context, args = (tJoin,))    tContext.start()#練習：將子線程設定為守護線程import threading  import time  class MyThread(threading.Thread):    def __init__(self, id):      threading.Thread.__init__(self)    def run(self):      time.sleep(5)      print "This is " + self.getName()  if __name__ == "__main__":    t1 = MyThread(999)    #t1.setDaemon(True) # 將子線程設定為守護線程，設定為守護線程後，主線程退出子線程跟著退出，防止子線程掛起  t1.start()    print "I am the father thread."

 

【Python】多線程-1