
import _thread
import time



class SendMsg:
    aux = 0

    def __init__(self):
        self.my_aux = 0

    def send(self):
        msg = 'send messge my Seq is {} and global aux is {}'.format(self.my_aux,self.aux)
        self.aux = self.aux + 1 if self.aux < 256 else self.aux % 256
        print(msg)


if __name__ == '__main__':
    msg1 = SendMsg()
    msg2 = SendMsg()
    msg1.send()
    msg1.send()
    msg2.send()
    msg2.send()


import threading
import time

exitFlag = 0

class myThread (threading.Thread):
    def __init__(self, threadID, name, counter):
        threading.Thread.__init__(self)
        self.threadID = threadID
        self.name = name
        self.counter = counter
        
    def run(self):
        print ("开始线程：" + self.name)
        print_time(self.name, self.counter, 5)
        print ("退出线程：" + self.name)

def print_time(threadName, delay, counter):
    while counter:
        if exitFlag:
            threadName.exit()
        time.sleep(delay)
        print ("%s: %s" % (threadName, time.ctime(time.time())))
        counter -= 1

# 创建新线程
thread1 = myThread(1, "Thread-1", 1)
thread2 = myThread(2, "Thread-2", 2)

# 开启新线程
thread1.start()
thread2.start()
thread1.join()
thread2.join()
print ("退出主线程")