python json 数据操作

#!/usr/bin/python3

import json

mytest_js = {
        "a" : 1,
        "b" : 2
        }

test = json.dumps({'4': 5, '6': 7});     # 合成不换行的字符串 json 数据

test1 = json.dumps({'4': 5, '6': 7}, sort_keys = True, indent = 4, separators = (',', ':'));   # 合成有换行的字符串数据

mytest_jsson = json.dumps(mytest_js);            #  解析出 json 格式的字符串

print(test);
print("");
print(test1);
print("");
print(mytest_jsson);

// 输出
{"4": 5, "6": 7}

{
    "4":5,
    "6":7
}

{"a": 1, "b": 2}

test1 = json.dumps({'4': 5, '6': 7}, sort_keys = True, indent = 4, separators = (',', ':'));   # 先合成为字符串
text = json.loads(test1);    # 后转化为对象输出
print(text);
print(text['4']);
print(text['6']);

{'4': 5, '6': 7}
5
7

https://docs.python.org/2/library/json.html
http://www.runoob.com/python/python-json.html
http://www.runoob.com/python3/python3-json.html