uv: Unified Python packaging (astral.sh)

submitted 2 months ago by uthredii@programming.dev to c/python@programming.dev

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TL;DR: uv is an extremely fast Python package manager, written in Rust.

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[-] FizzyOrange@programming.dev 3 points 2 months ago

you generally use a SAT solver for dependency resolution (unless you don’t care for correctness)

Actually Go's dependency system is specifically designed to avoid the need for global constraint solvers. Go has the most modern and elegant dependency versioning system that I'm aware of. Python was designed before people realised that it's dependency style was a mistake.

https://research.swtch.com/vgo-principles

[-] burntsushi@programming.dev 7 points 2 months ago

I'm on the uv team. I am quite partial to this approach as well. Alas, it's difficult culturally to pull this off in a pre-existing ecosystem. And in the case of Python at least, it's not totally clear to me that it would avoid the need for solving NP hard problems. See my other comment in this thread about simplifying PEP 508 marker expressions.

Other than avoiding needing a SAT solver to resolve dependencies, the other thing I like about Go's approach is that it makes it very difficult to "lie" about the dependencies you support. In a maximal environment, it's very easy to "depend" on foo 1.0 but where you actually need foo 1.1 without issues appearing immediately.