anchorpy VS cattrs

You looked in here? https://github.com/kevinheavey/anchorpy

Hi, creator of AnchorPy and core maintainer of solana-py here.

Generating Python code seems to be really uncommon. I was surprised at this - it's not an obviously insane thing to do, right? However I found almost no existing tooling to help me, and I did search for quite a while. Eventually I found a small, half-finished library called genpy and decided I would extend that as needed.

Here's the repo and here are the client-gen docs. Do let me know if you try it out and have any suggestions!

I used this for parsing a JSON IDL and it worked really well https://github.com/kevinheavey/anchorpy/blob/main/src/anchorpy/idl.py

I'd suggest you look at my cattrs (https://catt.rs) library as a good serde lookalike in Python (sum type support present and getting better), and to use attrs instead of dataclasses in general.

Pydantic is by far not the only library of its kind, with prominent members of the same class being attrs, cattrs or even plain dataclasses for some use cases.

That being said, data serialization is a very common thing to do, so naturally there are tons of libraries that automate it for you. Personally, using dataclasses and cattrs is my goto way for doing such things.

I'm fond of attrs and cattrs myself, attrs make creating data classes a snap, writing all of the stupid code python requires to have a dataclass. Note the new built in dataclass is actually a limited copy of attrs. https://www.attrs.org/en/stable/ and https://github.com/python-attrs/cattrs

This month, I've released version 0.17, and it's now blazing fast; there is in fact no more comparison with Pydantic, which more than 5x slower (up to 30x in serialization). It's also faster than alternatives like mashumaro or cattrs. (See the quick benchmark result in documentation, and the code)

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Cattrs has some problems with generics [1] [2]. Dacite and marshmallow-dataclasses don't support generics well either, with some issues around Union types.

They do work well for simple python types but what I'd like to see is guarantee that the serialisation operation is completely reversible and if not raise warning/exception.

[1] https://github.com/Tinche/cattrs/issues/149