Python JSON error XX is not json serializable workaround introduction

This article mainly introduces the Python JSON error XX is not JSON serializable solution of the relevant information, the need for friends can refer to the following

Python JSON error XX is not json serializable workaround

When using JSON, you often encounter xxx is not JSON serializable, which means that some objects cannot be serialized. Often, Django's classmates know that Django has a self-contained encoder to serialize time and other commonly used objects. In fact, we can define the serialization of certain types of objects by ourselves, and see how we define and use them.

#!/usr/bin/env python #-*-coding:utf-8-*-#json_extention #2014 -03-16 #copyright: Orangleliu #license: BSD "" Pyth On dumps method is very useful, can directly serialize our dict directly into JSON object but sometimes we add some custom classes can not be serialized, this time need to customize some of the serialization method reference: Http://www.php.cn/For example: in [3]: From datetime import datetime in [4]: json_1 = {' num ': 1112, ' Date ':d Atetime.now ()} in [5]: Import JSON in [6]: Json.dum  PS (json_1)---------------------------------------------------------------------------TypeError Traceback (most recent) D:\devsofts\python2.7\lib\site-packages\django\core\management\commands\shell.py C in <module> ()----> 1 Json.dumps (json_1) TypeError:datetime.datetime (3, +, +, A, Notoginseng, 353000) is not JSON serial izable "' From date Time Import datetime Import JSON Class Dateencoder (JSON. Jsonencoder): def default (self, obj): If Isinstance (obj, datetime): Return Obj.str () return JSON. Jsonencoder.default (self, obj) json_1 = {' num ': 1112, ' Date ':d atetime.now ()} printJson.dumps (json_1, Cls=dateencoder) "Output: PS d:\code\python\python_abc> python. \json_extention.py {" Date ":" 2   014-03-16 13:56:39.003000 "," num ": 1112}" #我们自定义一个类试试 class User (object): Def init (self, name): Self.name = Name Class Userencoder (JSON. Jsonencoder): def default (self, obj): If Isinstance (obj, User): Return obj.name return JSON. Jsonencoder.default (self, obj) json_2 = {' user ': User (' Orangle ')} print Json.dumps (json_2, Cls=userencoder) ' PS d:\c Ode\python\python_abc> python. \json_extention.py {"date": "2014-03-16 14:01:46.738000", "num": 1112} {"User": " Orangle "}"

Defining the processing method is to inherit the JSON. A subclass of Jsonencoder that is used when a custom processing method is added to the CLS function of the dumps method.

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