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863天前from random import randint |
from threading import Thread |
from time import time, sleep |
class DownloadTask(Thread): |
def __init__(self, filename): |
super().__init__() |
self._filename = filename |
def run(self): |
print('开始下载%s...' % self._filename) |
time_to_download = randint(5, 10) |
sleep(time_to_download) |
print('%s下载完成! 耗费了%d秒' % (self._filename, time_to_download)) |
def main(): |
start = time() |
t1 = DownloadTask('Python从入门到住院.pdf') |
t1.start() |
t2 = DownloadTask('Peking Hot.avi') |
t2.start() |
t1.join() |
t2.join() |
end = time() |
print('总共耗费了%.2f秒.' % (end - start)) |
if __name__ == '__main__': |
main() |
