python解析json数据

现在的API接口多为xml或json,json解析更简洁相对xml来说

以豆瓣的API接口为例，解析返回的json数据：

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":"满月之夜白鲸现",

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

    "summary":"那一年，是听莫扎特、钓鲈鱼和家庭破裂的一年。说到家庭破裂，母亲怪自己当初没有找到好男人，父亲则认为当时是被狐狸精迷住了眼，失常的是母亲，但出问题的是父亲……。",

    "attrs":{

       "publisher":["青岛出版社"],

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

        "author":["片山恭一", "豫人"],

        "price":["18.00元"],

        "title":["满月之夜白鲸现"],

        "binding":["平装(无盘)"],

        "translator":["豫人"],

        "pages":["180"]

    },

    "tags":[

        {"count":106, "name":"片山恭一"},

        {"count":50, "name":"日本"},

        {"count":42, "name":"日本文学"},

        {"count":30, "name":"满月之夜白鲸现"},

        {"count":28, "name":"小说"},

        {"count":10, "name":"爱情"},

        {"count":7, "name":"純愛"},

        {"count":6, "name":"外国文学"}

    ]

}

用Python解析我们想要的数据如：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']

结果图：

python中通常情况下for循环会枚举各个元素不会访问下标，例如：

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

但是有时候我们会需要在便利数组的同时访问下标，这时候可以借助于enumerate函数来实现，例如：

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

本文转自http://blog.csdn.net/zwto1/article/details/39829067