python#使用thread模块创建线程

import _thread
from time import sleep, ctime
def thread1():
    print('线程1开始：', ctime())
    print('线程1挂起4秒')
    sleep(4)
    print('线程1结束：', ctime())
def thread2():
    print('线程2开始：', ctime())
    print('线程2挂起2秒')
    sleep(2)
    print('线程2结束：', ctime())
def thread3():
    print('线程3开始:', ctime())
    print('线程3挂起1秒')
    sleep(1)
    print('线程3结束', ctimr())
def main():
    print('主线程开始！')
    #线程函数为无参数函数，args为空元祖
    _thread.start_new_thread(thread1, ())
    _thread.start_new_thread(thread2,())
    _thread.start_new_thread(thread3,())
    sleep(6)
    print('全部结束：', ctime())
if __name__ == '__main__':
    main()