python练习

 1 # encoding=utf-8
 2 import json
 3 
 4 import requests
 5 
 6 
 7 class ZhihuLastedNews(object):
 8     """
 9     input url you will get the data from web
10     then get what you want
11     """
12     def __init__(self, url):
13         r = requests.get(url)
14         self.data = json.loads(r.text)
15 
16     @property
17     def image_urls(self):
18         stories = self.data.get('stories')
19         return [d.get('images') for d in stories]  # 列表推导式
20 
21     @property
22     def date(self):
23         return self.data.get('date')
24 
25     def __call__(self, url):
26         return requests.get(url).status_code
27 
28     def __str__(self):
29         return 'ZhihuLastedNews version 1.0'
30 
31 if __name__ == "__main__":
32     zhihu = ZhihuLastedNews("http://news-at.zhihu.com/api/4/news/latest")
33 
34     print zhihu.image_urls
35     print "{0}年{1}月{2}号".format(zhihu.date[:4], zhihu.date[4:6], zhihu.date[6:])
36 
37     print dir(ZhihuLastedNews)
38 
39     print zhihu("http://news-at.zhihu.com/api/4/news/latest")
40 
41     print zhihu.__doc__