[英]Unable to decode a json string to a python object using jsonpickle
My class structure is as follows - 我的班级结构如下 -
class HelloWorld (object):
def __init__(self, name, i, id):
self.name = name
self.i = i
self.id = id
The I'm creating an object 我在创造一个物体
p = HelloWorld('pj', 3456, '1234')
and passing this object to a definition, where I use jsonpickle.encode
and jsonpickle.decode
as follows 并将此对象传递给定义,其中我使用
jsonpickle.encode
和jsonpickle.decode
如下
>>>print(type(p))
<class 'HelloWorld'>
>>>x = jsonpickle.encode(p)
>>>print(x)
{"i": 3456, "name": "pj", "py/object": "__builtin__.HelloWorld", "id": "1234"}
>>>y = jsonpickle.decode(x)
>>>print(type(y))
<class 'dict'>
I don't understand why I'm not able to decode it back to the original object, even though the distinguishing py/object
is also present. 我不明白为什么我无法将它解码回原始对象,即使区别
py/object
也存在。
Can anyone please suggest what am I doing wrong? 任何人都可以建议我做错了什么?
Adding the code which generate's the dynamic class for above mentioned use case. 添加生成上述用例的动态类的代码。
def _create_pojo(self, pojo_class_name, param_schema):
#extracting the properties from the parameter 'schema'
pojo_properties = param_schema['properties']
#creating a list of property keys
pojo_property_list = []
for key in pojo_properties:
pojo_property_list.append(key)
source = \
"class %s (object):\n" % ( pojo_class_name )
source += " def __init__(self, %s" % ', '.join(pojo_property_list) +"):\n" #defining __init__ for the class
for prop in pojo_property_list: #creating a variable in the __init__ method for each property in the property list
source += " self.%s = %s\n" % (prop, prop)
#generating the class code
class_code = compile( source, "<generated class>", "exec" )
fakeglobals = {}
eval( class_code, {"object" : object}, fakeglobals )
result = fakeglobals[ pojo_class_name ]
result ._source = source
pprint.pprint(source)
self._object_types[ pojo_class_name ] = result
return result
The main problem here is, the class is not available while decoding, hence unable to decode it as an python object. 这里的主要问题是,类在解码时不可用,因此无法将其解码为python对象。
According to the JsonPickle documentation( http://jsonpickle.github.io/#module-jsonpickle ), the object must be accessible globally via a module and must inherit from object (AKA new-style classes). 根据JsonPickle文档( http://jsonpickle.github.io/#module-jsonpickle ),对象必须可以通过模块全局访问,并且必须从对象继承(AKA新式类)。
Hence followed following recipe, http://code.activestate.com/recipes/82234-importing-a-dynamically-generated-module/ . 因此遵循以下配方, http://code.activestate.com/recipes/82234-importing-a-dynamically-generated-module/ 。 Using this you can generate dynamic module and load the classes dynamically.
使用此方法,您可以生成动态模块并动态加载类。 In this way while decoding the class will be accessible, and hence you can decode it back to python object.
通过这种方式解码类将是可访问的,因此您可以将其解码回python对象。
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