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json nested object serialization
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| import json | |
| import typing | |
| from json import JSONEncoder | |
| def _default(self, obj): | |
| return getattr(obj.__class__, "serialize", _default.default)(obj) | |
| _default.default = JSONEncoder().default | |
| JSONEncoder.default = _default | |
| class ISerializable: | |
| def serialize(self) -> str: | |
| d = {k: v for k, v in self.__dict__.items() if not k.startswith("_")} | |
| s = json.dumps(d) | |
| s = s.replace('"{', '{') | |
| s = s.replace('}"', '}') | |
| s = s.replace("\\", "") | |
| return s | |
| @staticmethod | |
| def deserialize(tt, json_string: str) -> 'ISerializable': | |
| t = tt() | |
| json_data = json.loads(json_string) | |
| for k, v in json_data.items(): | |
| if isinstance(v, dict): | |
| ct = type(getattr(t, k)) | |
| o = ct.deserialize(ct, json.dumps(v)) | |
| setattr(t, k, o) | |
| elif isinstance(v, list): | |
| tab = ISerializable.deserialize_list(k, t, v) | |
| setattr(t, k, tab) | |
| else: | |
| setattr(t, k, v) | |
| return t | |
| @staticmethod | |
| def deserialize_list(k, t, v): | |
| tab = [] | |
| for e in v: | |
| if isinstance(e, dict): | |
| ct = type(getattr(t, k)[0]) | |
| o = ct.deserialize(ct, json.dumps(e)) | |
| tab.append(o) | |
| elif isinstance(e, list): | |
| tab.append(ISerializable.deserialize_list(k, t, e)) | |
| else: | |
| tab.append(e) | |
| return tab | |
| class TT(ISerializable): | |
| def __init__(self): | |
| self.count = 2 | |
| self.o = OMG() | |
| def __str__(self): | |
| return f"TT.{self.count},{self.o}" | |
| class OMG(ISerializable): | |
| def __init__(self): | |
| self.count = 20 | |
| def __str__(self): | |
| return f"OMG.{self.count}" | |
| class Test(ISerializable): | |
| name: str | |
| parent: TT | |
| _hidden: int | |
| parent: typing.List[TT] | |
| def __init__(self): | |
| self.name = "toto" | |
| self.parent = TT() | |
| self.parents = [TT(), TT()] | |
| self._hidden = 10 | |
| def __str__(self): | |
| pt = "" | |
| for p in self.parents: | |
| pt += str(p) | |
| return f"{self.name},{pt},{self.parent},{self._hidden}" | |
| def main(): | |
| t = Test() | |
| print(t) | |
| s = t.serialize() | |
| print(s) | |
| t = Test.deserialize(Test, s) | |
| print(t) | |
| # Press the green button in the gutter to run the script. | |
| if __name__ == '__main__': | |
| main() |
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