#!usr/bin/python3
# -*- coding:utf-8 -*-
"""
简单的多线程
"""

from random import randint
from threading import Thread
from time import time,sleep

def download(filename):
    print("开始下载%s ..." % filename)
    time_to_download=randint(5,10)
    sleep(time_to_download)
    print("%s下载完成！耗费了%d秒" % (filename,time_to_download))

def main():
    start=time()
    t1=Thread(target=download,args=("Python从入门到住院.pdf",))#args是元组
    t1.start()
    t2=Thread(target=download,args=("Peking Hot.avi",))#args是元组
    t2.start()
    t1.join()
    t2.join()
    end=time()
    print("总共耗费了%.3f秒"% (end-start))

if __name__=='__main__':
    main()
    
