"""
使用多线程的情况 - 模拟多个下载任务

Version: 0.1
Author: 骆昊
Date: 2018-03-20
"""

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


def download_task(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()
    thread1 = Thread(target=download_task, args=('Python从入门到住院.pdf',))
    thread1.start()
    thread2 = Thread(target=download_task, args=('Peking Hot.avi',))
    thread2.start()
    thread1.join()
    thread2.join()
    end = time()
    print('总共耗费了%.3f秒' % (end - start))


if __name__ == '__main__':
    main()