🔒 Dataclasses: get child objects to structure into their own dataclasses?

[mighty lotus]

Lets say I have a dataclass about a user. I get the data from its source as a nested dict:

{
name: 'test',
addresses: [{}, {}]
}

where addresses is a list of structured data, formattable into its own dataclass.

Can I put together something in the parent dataclass to automatically ingest the addresses and build them into their own defined dataclass? Or would I have to first turn them into instances of an Address dataclass, then pull that into a parent?

[robust dune]

@mighty lotus

Python help channel opened

Remember to:

• Ask your Python question, not if you can ask or if there's an expert who can help.
• Show a code sample as text (rather than a screenshot) and the error message, if you've got one.
• Explain what you expect to happen and what actually happens.

:warning: Do not pip install anything that isn't related to your question, especially if asked to over DMs.

Closes after a period of inactivity, or when you send !close.

[simple monolith]

You might want to use something like https://github.com/jcrist/msgspec

[hexed temple]

Probably the latter?

[simple monolith]

Or cattrs or marshmallow

pydantic v2 etc etc

[mighty lotus]

Thanks. I was thinking more about getting a bunch of DB data, some of which may be json, and trying to structure that. I guess I'm just not sure which direction to go. I didn't think of msgspec, as I tend to think of that more for serialization.

I just came from a slack where I got a whole bunch of "ORMs suck!", and I think it's kinda muddled my mind

[simple monolith]

There's https://sqlmodel.tiangolo.com/

[mighty lotus]

Even with something like pydantic, I'm not aware of how to structure nested data, thus asking here

[simple monolith]

pydantic should just work with nested data

[mighty lotus]

Ok, I'll try again, maybe I made a mistake

And I'll look at sqlmodel... it may be just what I want, sqlalchemy-esque but less confusing (I spent the last 8 hours trying to read the sql alchemy docs and don't feel like I understand it yet)

Oh man, sqlmodel is based on sql alchemy? In 5 minutes, I think I have a better understanding of sqlalchemy than in the last 2 hours of documentation reading...

Ok, seems like trying to learn sqlalchemy and using pydantic is the way to go, and following sqlmodel as it matures more

Thanks for the help. Not sure I got an answer I can use, but meh, its one of those days

[robust dune]

Python help channel closed

This help channel has been closed and it's no longer possible to send messages here. If your question wasn't answered, feel free to create a new post in #1035199133436354600. To maximize your chances of getting a response, check out this guide on asking good questions.