| 123456789101112131415161718192021222324252627282930 | #coding=utf-8import threadingfrom time import sleep,ctimedef sing():    for i in range(3):        print("正在唱歌...%d"%i)        sleep(1)def dance():    for i in range(3):        print("正在跳舞...%d"%i)        sleep(1)if __name__ == '__main__':    print('---开始---:%s'%ctime())    t1 = threading.Thread(target=sing)    t2 = threading.Thread(target=dance)    t1.start()    t2.start()    while True:        length = len(threading.enumerate())        print('当前运行的线程数为:%d'%length)        if length<=1:            break        sleep(0.5)
 |