python解析json數據

現在的API接口多為xml或json,json解析更簡潔相對xml來說

 

以豆瓣的API接口為例，解析返回的json數據：

https://api.douban.com/v2/book/1220562

{

    "id":"1220562",

    "alt":"http:\/\/book.douban.com\/book\/1220562",

    "rating":{"max":10, "average":"7.0", "numRaters":282, "min":0},

    "author":[{"name":"片山恭一"}, {"name":"豫人"}],

    "alt_title":"",

    "image":"http:\/\/img1.douban.com\/spic\/s1747553.jpg",

    "title":"滿月之夜白鯨現",

    "mobile_link":"http:\/\/m.douban.com\/book\/subject\/1220562\/",

    "summary":"那一年，是聽莫扎特、釣鱸魚和家庭破裂的一年。說到家庭破裂，母親怪自己當初沒有找到好男人，父親則認為當時是被狐狸精迷住了眼，失常的是母親，但出問題的是父親……。",

    "attrs":{ 

       "publisher":["青島出版社"],

        "pubdate":["2005-01-01"],

        "author":["片山恭一", "豫人"],

        "price":["18.00元"],

        "title":["滿月之夜白鯨現"],

        "binding":["平裝(無盤)"],

        "translator":["豫人"],

        "pages":["180"]

    },

    "tags":[

        {"count":106, "name":"片山恭一"},

        {"count":50, "name":"日本"},

        {"count":42, "name":"日本文學"},

        {"count":30, "name":"滿月之夜白鯨現"},

        {"count":28, "name":"小說"},

        {"count":10, "name":"愛情"},

        {"count":7, "name":"純愛"},

        {"count":6, "name":"外國文學"}

    ]

}

用Python解析我們想要的數據如：id、rating里的max 、tags第一行的name值

import urllib2

import json

html = urllib2.urlopen(r'https://api.douban.com/v2/book/1220562')

hjson = json.loads(html.read())

print hjson['id']

print hjson['rating']['max']

print hjson['tags'][0]['name']

結果圖：

 

python中通常情況下for循環會枚舉各個元素不會訪問下標，例如：

l = [1,2,4,6] for val in l: print l

但是有時候我們會需要在便利數組的同時訪問下標，這時候可以借助於enumerate函數來實現，例如：

l = [1,2,3] for index,val in enumerate(l): print 'index is %d, val is %d' % (index,val)

本文轉自http://blog.csdn.net/zwto1/article/details/39829067