22701.py

#!/usr/bin/env python
# coding=utf-8

import json

class Person(object):
    def __init__(self,name,age):
        self.name = name
        self.age = age
    
    def __repr__(self):
        return 'Person Object name : %s , age : %d' % (self.name,self.age)


def object2dict(obj):    #convert Person to dict
    d = {}
    d['__class__'] = obj.__class__.__name__
    d['__module__'] = obj.__module__
    d.update(obj.__dict__)
    return d

def dict2object(d):     #convert dict ot Person
    if '__class__' in d:
        class_name = d.pop('__class__')
        module_name = d.pop('__module__')
        module = __import__(module_name)
        class_ = getattr(module, class_name)
        args = dict((key.encode('ascii'), value) for key,value in d.items())    #get args
        inst = class_(**args)    #create new instance
    else:
        inst = d
    return inst
    

if __name__  == '__main__':
    p = Person('Peter',40)
    print p
    d = object2dict(p)
    print d
    o = dict2object(d)
    print type(o), o

    dump = json.dumps(p, default=object2dict)
    print dump
    load = json.loads(dump, object_hook=dict2object)
    print load