import threading
import time

#继承 class threading.Thread
class MyThread(threading.Thread):

    #类做初始化
    def __init__(self,name):
        #调用hreading.Thread.__init__(self)方法
        threading.Thread.__init__(self)
        self.name=name

    # 把要执行的代码写到run函数里面 线程在创建后会直接运行run函数
    def run(self):
        print_time(self.name)


def print_time(name):
    if name=="Thread1":
        for i in range(3):
            print("Thread1 Star"+time.ctime(time.time()))
            time.sleep(2)
            print("Thread1"+time.ctime(time.time()))
            print("Thread1 End" + time.ctime(time.time()))
    else:
        for i in range(3):
            print("Thread2 Star"+time.ctime(time.time()))
            time.sleep(5)
            print("Thread2"+time.ctime(time.time()))
            print("Thread2 End" + time.ctime(time.time()))


#创建线程
t1=MyThread("Thread1")
t2=MyThread("Thread2")
#启动线程
t1.start()
t2.start()
#守护进程，直到子线程结束
t1.join()
t2.join()

python3 多线程笔记