Extendable JSON

Extendable JSON is an extendable drop in replacement of Python’s JSON library. By using @json_serialize and @json_deserialize decorators to enable custom objects not normally serializable by default.

This library includes the ability to serialize Exceptions, Objects, and Datetime objects by default.

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Usage:

import extendable_json as json
json.dumps({"Key": "Value"})

outputs: “{“Key”: “Value”}” as string

import extendable_json as json
json.loads('"{"Key": "Value"}"')

outputs: {“Key”: “Value”} as dict

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To extend serialization to objects not normally serializable or customize serialization of an object, decorate a function accepting a single value with @json_serialize.register giving the object to serialize with this function. Return a dict containing keys and values of the object.

@json_serialize.register(MyObject)
def serialize_my_object(val):
    return {"Attrib": str(val.attrib)}

Reverse this by decorating a function accepting a single value with @json_deserialize.register. Using val as a dictionary, extract the serialized data into a new object loading with data from val. Return the newly created object.

@json_deserialize.register(MyObject)
def deserialize_my_object(val):
    myObject = MyObject()
    myObject.attrib = val['Attrib']
    return myObject

Exceptions

Exceptions may be serialized or deserialized.

Exceptions may be serialized within try/except block

try:
    # Exception thrown
except Exception as e:
    import extendable_json as json
    json.dumps(e)

Once deserialized exceptions may be raised and/or the Traceback is available with the traceback attr.

e = json.loads(exeption_json)
raise e #To raise exception
print(e.traceback) #To print traceback

API Reference

extendable_json.dump(obj, fp, *, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=_JSONDecoder, indent=None, separators=None, default=None, sort_keys=False, **kw)

Use exactly as Python’s JSON.

Please note that using the cls kwarg will disable this library’s functionality

extendable_json.dumps(obj, *, skipkeys=False, ensure_ascii=True, check_circular=True, allow_nan=True, cls=_JSONDecoder, indent=None, separators=None, default=None, sort_keys=False, **kw)

Use exactly as Python’s JSON.

Please note that using the cls kwarg will disable this library’s functionality

extendable_json.load(fp, *, cls=_JSONEncoder, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)

Use exactly as Python’s JSON.

Please note that using the cls kwarg will disable this library’s functionality

extendable_json.loads(s, *, cls=_JSONEncoder, object_hook=None, parse_float=None, parse_int=None, parse_constant=None, object_pairs_hook=None, **kw)

Use exactly as Python’s JSON.

Please note that using the cls kwarg will disable this library’s functionality

@extendable_json.json_serialize(object)

Decorator used to add objects to serialization registry. Please see above documentation on how to use.

@extendable_json.json_deserialize(object)

Decorator used to add objects to deserialization registry. Please see above documentation on how to use.

Indices and tables

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• Module Index

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