mport _thread as thread

import time

def loop1(in1):

    print("Start loop 1 at:",time.ctime())

    print("我是参数",in1)

    time.sleep(4)

    print("End loop 1 at:",time.ctime())

​

def loop2(in1,in2):

    print("Start loop 2 at:",time.ctime())

    print("我是参数",in1,"和参数 ",in2)

    time.sleep(4)

    print("End loop 2 at:",time.ctime())

​

import threading

def main1():

    print("Starting at:",time.ctime())

    t1 = threading.Thread(target=loop1,args=('',))

    t1.setName("THR_1")#给线程重命名

    t1.start()

​

    t2 = threading.Thread(target=loop2,args=('',''))

    t2.setName("THR_2")

    t2.setDaemon(True)  #主线程运行完了就完了，不用等线程2

    t2.start()

​

    time.sleep(3)#三秒后两个子线程仍然在运行着，因为他们里面有一个四秒在停着

    for thr in threading.enumerate():#返回的是正在运行的子线程的列表

        print("正在运行的子线程名为：{0}".format(thr.getName()))#读取了该线程的名字

​

    print("正在运行的子线程数量为：{0}".format(threading.activeCount()))#打印出了线程的数量，包括主线程和两个子线程一共3个线程

    t1.join()#等线程1运行完了再接着向下运行

    print("ALL done at :",time.ctime())

​

if __name__ == "__main__":

    main1()

  class MyThread(threading.Thread):#定义一个Thread的子类

        def __init__(self,args):#重写__init__函数，其中参数为self和新引入的参数

            super(MyThread,self).__init__()#固定格式，继承父类的__init__函数

            self.args = args

​

        def run(self):

            time.sleep(1)

            print("The args for this class is {0}".format(self.args))

​

    for i in range(5):

        t = MyThread(i)

        t.start()

        t.join()