1 import requests,time,threading
2 from hashlib import md5
3 result = {}
4 def down_load_pic(url):
5 req = requests.get(url)
6 m = md5(url.encode())
7 with open( m.hexdigest()+'.png','wb') as fw:
8 fw.write(req.content)
9
10 url_list = ['http://www.nnzhp.cn/wp-content/uploads/2019/10/f410afea8b23fa401505a1449a41a133.png',
11 'http://www.nnzhp.cn/wp-content/uploads/2019/11/481b5135e75c764b32b224c5650a8df5.png',
12 'http://www.nnzhp.cn/wp-content/uploads/2019/11/b23755cdea210cfec903333c5cce6895.png',
13 'http://www.nnzhp.cn/wp-content/uploads/2019/11/542824dde1dbd29ec61ad5ea867ef245.png']
14
15 #单线程下载
16 # start_time = time.time()
17 # for url in url_list:
18 # down_load_pic(url)
19 # end_time = time.time()
20 # print(end_time - start_time)
21
22 #多线程下载
23 start_time = time.time()
24 for url in url_list:
25 t = threading.Thread(target=down_load_pic,args=(url,))
26 t.start()
27 while threading.activeCount() !=1:
28 pass
29 end_time = time.time()
30 print(end_time - start_time)