【python】json

1. json

啥是json，http://www.json.cn/wiki.html

{
    "alarmRule": {
        "name": "al1",
        "comment": "description",
        "informType": 3,
        "timeValue": "1",
        "alarmLine": "90",
        "operator": null,
        "level": 3,
        "needtoUpdate":false,
        "snList": [{
            "sn": "123"
        },
        {
            "sn": "321"
        }],
        "interfaceList": []
    }
}

2. python json

JSON类型	PYTHON类型
对象 {}	dict
数组 []	list
string	string，unicode
123,123.45	int,float
true/false	True/False
null	None

3. string of json 转换为 json in python

反序列化，所有的字符串对象，默认都是Unicode，JSON标准中规定JSON编码就是unicode

import json
alarmvalue = """
        {
            "alarmRule": {
                "name": "al1",
                "comment": "description",
                "informType": 3,
                "timeValue": "1",
                "alarmLine": "90",
                "operator": null,
                "level": 3,
                "needtoUpdate":false,
                "snList": [{
                    "sn": "123"
                },
                {
                    "sn": "321"
                }],
                "interfaceList": []
            }
        }
    """
alarmvalueJson = json.loads(alarmvalue)
print alarmvalueJson

运行结果

C:Python27python.exe C:/PycharmProjects/p3/src/pyproject1/iotest/jsonTest.py
{u'alarmRule': {u'comment': u'description', u'name': u'al1', u'level': 3, u'timeValue': u'1', u'needtoUpdate': False, u'interfaceList': [], u'operator': None, u'alarmLine': u'90', u'snList': [{u'sn': u'123'}, {u'sn': u'321'}], u'informType': 3}}

Process finished with exit code 0

4. dict 转换为 string of json

import json
jsonOfDict = {
            'alarmRule': {
                'comment': 'description',
                'name': 'al1',
                'level': 3,
                'timeValue': '1',
                'needtoUpdate': False,
                'interfaceList': [],
                'operator': None,
                'alarmLine': '90',
                'snList': [{
                    'sn': '123'
                },
                {
                    'sn': '321'
                }],
                'informType': 3
            }
        }
jsonOfStr = json.dumps(jsonOfDict)
print jsonOfStr

执行脚本

C:Python27python.exe C:/PycharmProjects/p3/src/pyproject1/iotest/jsonTest2.py
{"alarmRule": {"comment": "description", "operator": null, "interfaceList": [], "name": "al1", "level": 3, "needtoUpdate": false, "timeValue": "1", "alarmLine": "90", "snList": [{"sn": "123"}, {"sn": "321"}], "informType": 3}}

Process finished with exit code 0