python json 序列化任意数据类型

json默认支持的数据类型

  +-------------------+---------------+
    | Python            | JSON          |
    +===================+===============+
    | dict              | object        |
    +-------------------+---------------+
    | list, tuple       | array         |
    +-------------------+---------------+
    | str               | string        |
    +-------------------+---------------+
    | int, float        | number        |
    +-------------------+---------------+
    | True              | true          |
    +-------------------+---------------+
    | False             | false         |
    +-------------------+---------------+
    | None              | null          |
    +-------------------+---------------+

通过修改默认方法

import json
from json import JSONEncoder
from datetime import datetime
class ComplexEncoder(JSONEncoder):
    def default(self, obj):
        if isinstance(obj, datetime):
            return obj.strftime('%Y-%m-%d %H:%M:%S')
        else:
            return super(ComplexEncoder,self).default(obj)
d = { 'name':'alex','data':datetime.now()}
print(json.dumps(d,cls=ComplexEncoder))
# {"name": "alex", "data": "2018-05-18 19:52:05"}