learning-python/json/json_decoder_object_hook.py at master · rhay-git/learning-python

30 lines (23 loc) · 898 Bytes

#!/usr/bin/env python

# encoding: utf-8

import json

class MyDecoder(json.JSONDecoder):

def __init__(self):

json.JSONDecoder.__init__(self, object_hook=self.dict_to_object)

def dict_to_object(self, d):

if '__class__' in d:

class_name = d.pop('__class__')

module_name = d.pop('__module__')

module = __import__(module_name)

print 'MODULE:', module

class_ = getattr(module, class_name)

print 'CLASS:', class_

args = dict((key.encode('ascii'), value) for key, value in d.items())

print 'INSTANCE ARGS:', args

inst = class_(**args)

else:

inst = d

return inst

encoded_object = '[{"s": "instance value goes here", "__module__": "json_myobj", "__class__": "MyObj"}]'

myobj_instance = MyDecoder().decode(encoded_object)

print myobj_instance

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