Package request: pydantic_2

[nbraud]

Project description

pydantic is a Python library for data validation and settings management using PEP 484 type annotations.

It's v2 implements validation and serialisation logic in Rust, for a 5-50x speedup compared to v1 (according to its authors), in addition to functional improvements, new features, etc.

Metadata

• homepage URL: https://pydantic.dev/
• source URL: https://github.com/pydantic/pydantic
• license: MIT
• platforms: all

[natsukium]

pydantic2 contains breaking changes, and many downstream packages are not yet ready for it.
A variant like pydantic_2 cannot be included in nixpkgs as the following comment.
#244564 (comment)

[nbraud]

Oh, I see. Yeah, $PYTHONPATH does make that difficult then.

[MayNiklas]

pydantic2 contains breaking changes, and many downstream packages are not yet ready for it. A variant like pydantic_2 cannot be included in nixpkgs as the following comment. #244564 (comment)

If I understand it correctly:

• we can't offer a v2 variant
• we can't upgrade to v2 because of breaking changes

Since more and more packages start to rely on v2: what are our options then?
For example: fastAPI already uses v2.
Not all projects will migrate to v2 in the near future.

Update: also, we can't update packages already using v2.
Naive approach: don't we have the option, to flag a v2 variant as "conflicts with v1"?

[carlthome]

Could this be reopened? This is a pretty major user issue (I'm just trying to run copier 8.3.0 and got into this rabbit hole) that will get worse over time.

[natsukium]

A month ago we had over 1000 broken packages, now we are down to about 100.
This PR has a list of packages that are incompatible with v2 and we would like your help in creating patches for upstream.

[dzmitry-lahoda]

Hello,

may be there is some python packages list generated? not nixpkgs. so i can use arbitrary versions?

i found some abandoned/deprecated project. so my option is to directly build all pacakges. so i guess some generate would help. i do not care size, just need all versions at hand.

[nixos-discourse]

This issue has been mentioned on NixOS Discourse. There might be relevant details there:

https://discourse.nixos.org/t/installing-a-python-package-from-pypi/24553/9

[natsukium]

I'm not sure why you commented here, but why don't you try dream2nix, poetry2nix or pyproject2nix?

[dzmitry-lahoda]

dream2nix

will fail for complex project. did not checked - but pretty sure - cool, ambitious - but cannot handle edge cases - which is blocker

poetry2nix

I use it, but need to do for each project, neither can shell directly into, until do it.

pyprojectx

not nix and not sure why it is better than pure poetry.

i seek for nix develop/build/run + poetry usage directly, not via some yet another tool to install, just some automated glue for nix+poetry.

[dzmitry-lahoda]

I'm not sure why you commented here,

I got problem, started to search, fastapi, codegent-model - all goes here. search first location is best one so others skip over my research and do next step.

[natsukium]

I don't think it's appropriate to continue here since this issue has already been closed as completed and what you say has nothing to do with nixpkgs.

[dzmitry-lahoda]

@natsukium please do not continue. what is the issue?

here is pydantic2 here it is https://www.reddit.com/r/NixOS/comments/17twg8s/poetry2nix_with_a_cargo_dependency/