python练习册 每天一个小程序 第0005题

 1 # -*-coding:utf-8-*-
 2 __author__ = 'Deen'
 3 '''
 4 题目说明： 你有一个目录，装了很多照片，把它们的尺寸变成都不大于 iPhone5 分辨率的大小。
 5
 6 思路： 先获取该目录下所有图片的绝对路径，再一个一个打开,resiz改变大小保存
 7 '''
 8
 9 from PIL import Image
10 import os
11
12
13 # 获取目录下所有图片的绝对路径
14 def list_files(dir, wirldcard, recursion):
15     files_text = list()
16     exts = wirldcard.split(" ")
17     files = os.listdir(dir)
18     for name in files:
19         fullname = os.path.join(dir, name)
20         if (os.path.isdir(fullname) & recursion):
21             list_files(fullname, wirldcard, recursion)
22         else:
23             for ext in exts:
24                 if (name.endswith(ext)):
25                     files_text.append(fullname)
26                     break
27     # print files_text
28     return files_text
29
30
31 def images_resize(imgs, width, height):
32     n = 0
33     for img in imgs:
34         n += 1
35         image = Image.open(img)
36         out = image.resize((width, height), Image.ANTIALIAS)
37         out.save(str(n) + '.jpg', 'jpeg')
38
39
40 if __name__ == '__main__':
41     dir = "E:\\images"
42     wildcard = ".jpg .png"
43     images_resize(list_files(dir, wildcard, 1), 500, 500)
44
45 '''
46 参考代码：
47 import os
48
49 from PIL import Image
50
51 def resize_image(image):
52     im = Image.open(image)
53     width, height = im.size
54     if height > 1136 or width > 640:
55         th = height / 1136
56         td = width / 640
57         ts = max(th, td)
58         nh = int(height / ts)
59         nw = int(width / ts)
60         im = im.resize((nw, nh))
61         im.save(image)
62         print('Successfully resized %s. New width is %i, new height is %i.' % (image, nh, nw))
63     else:
64         print("There's no need to resize %s." % image)
65
66 def main():
67     for i in os.listdir():
68         try:
69             resize_image(i)
70         except IOError:
71             print("Oops! %s is not supported to make the change!" % i)
72
73 if __name__ == '__main__':
74     main()
75
76 '''