I have looked at using orjson for the serialisation of the callback I use to store data. However, if I return a callback with eg. orjson.dumps({dic full of numpy or datetime}, orjson.OPT_NAIVE_UTC | orjson.OPT_SERIALIZE_NUMPY) I get plenty of complains that it is of type byte which is precisely w…

Hi, I think the clue is in the error message: returned a value having type bytes which is not JSON serializable. I would assume you would get the same error with the standard JSON library In general I think there are two separate things. The statement in the docs : orjson is completely optiona…

orjson serialisation is of type bytes, it is the whole point of it. [image] GitHub - ijl/orjson: Fast, correct Python JSON library supporting... Fast, correct Python JSON library supporting dataclasses, datetimes, and numpy - GitHub - ijl/orjson: Fast, correct Python JSON library support…

BTW, what I use is this class to be able to dump stuff between Callbacks class JsonEncoder(json.JSONEncoder): def default(self, obj): if isinstance(obj, np.ndarray): return obj.tolist() elif isinstance(obj, datetime): return (str(obj)) else: …

From what I could see in the doc this seems about right. Either default (as you did) or setting the Option orjson.OPT_PASSTHROUGH_SUBCLASS which would ignore unsupported subtypes. Did you try that one to see if the error disappears and what data is available/missing?

OK, so it seems that it might be because I use dash extensions enrich Traceback (most recent call last): File "/home/julien/.local/lib/python3.10/site-packages/dash_extensions/enrich.py", line 747, in decorated_function outputs = f(*args, **kwargs, dash_logger=logger) File "/media/julien/N…

Apart from the case of ServersideOutput (where dash-extensions changes the serialization flow completely), I don’t believe that dash-extensions would affect the serialization mechanism. Could you provide a small example that works in Dash, but not using dash-extensions? Then I’ll take a look at what…

OK, so if the serialisation doesn’t change that means that dumping an orjson to transfer data between callback will not work in any case, whatever the extension. I am very confused by Performance | Dash for Python Documentation | Plotly stating we could serialise with orjson. It is rather there t…

Dash 2.8 and orjson

Dash Python

boorhin February 4, 2023, 2:54pm 3

orjson serialisation is of type bytes, it is the whole point of it.

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Dash 2.8 and orjson

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