Python中使用 JSON

Python中使用 JSON

原文:http://www.pythonclub.org/modules/jsonjavascript

JSON是JavaScript Object Notation的缩写,SJON是一种轻量级的数据交换格式。易于人阅读和编写。同时也易于机器解析和生成。html

它基于JavaScript Programming Language, Standard ECMA-262 3rd Edition - December 1999的一个子集。java

JSON采用彻底独立于语言的文本格式,可是也使用了相似于C语言家族的习惯(包括C, C++, C#, Java, JavaScript,Perl, Python等)。python

这些特性使JSON成为理想的数据交换语言。json

Python在2.6之后的版本中报好了JSON模块,能够直接在Python中import json.api

Python 2.7 使用JSON 模块

Python 2.7中自带了JSON模块,直接import json就能够使用了。ui

#! /tools/cfr/bin/python import json  
 
s = '[{"name":"niaochao","point":{"lat":"39.990","lng":"116.397"},"desc":"aoyunhuizhuchangdi"},{"name":"beidapingpangqiuguan","point":{"lat":"39.988","lng":"116.315"},"desc":"pingpangqiubisaichangdi"},{"name":"beijinggongrentiyuchang","point":{"lat":"39.930","lng":"116.446"},"desc":"zuqiubisaichangdi"}]'  locations = json.loads(s)  print str(len(locations))  for location in locations:  
    print location["name"]  
    print location["point"]["lat"]

结果为:spa

3
niaochao
39.990
beidapingpangqiuguan
39.988
beijinggongrentiyuchang
39.930

Python 2.5 安装 JSON模块

可是对已Python 2.5之前的版本,这须要咱们下载json模块。code

首先从http://pypi.python.org/pypi/python-json下载python-json, 而后安装。htm

解压zip包 而后把json.py minjson.py 拷到 /usr/lib/python2.5/下面就好了。

怎样使用请看:http://docs.python.org/library/json.html

Python 2.5 JSON应用实例

import json  
 
s = '[{"name":"niaochao","point":{"lat":"39.990","lng":"116.397"},"desc":"aoyunhuizhuchangdi"},{"name":"beidapingpangqiuguan","point":{"lat":"39.988","lng":"116.315"},"desc":"pingpangqiubisaichangdi"},{"name":"beijinggongrentiyuchang","point":{"lat":"39.930","lng":"116.446"},"desc":"zuqiubisaichangdi"}]'  locations = json.read(s)  print str(len(locations))  for location in locations:  
    print location["name"]  
    print location["point"]["lat"]

参考

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