Yet another python packager............... insane that such a popular language still doesn't have this basic problem solved.
Glad I use arch btw, pacman manages my python packages so I don't have to deal with all this mess.
Yeah but this one is actually good. So hopefully it will displace all the others.
pip is a perfectly usable package manager and is included in most python distributions now. Is it perfect? No, but it is good enough for every team I have been on.
it's usable, yet it doesn't attempt to solve a a third of the problems uv, poetry, and pdm address.
it's also not hard to end up with a broken env with pip.
@CodeMonkey @ertai No it is not perfectly usable for all people, all projects, all situations. uv definitely gets much closer to that.
Except that it’s slower than uv and therefore strictly worse for build processes
I use poetry and it works really well. I would consider it solved but that doesn't mean there isn't the possibility of a better solution.
It’s a really bold claim. Every time a new package manager and/or dependency resolver comes around, we have the exact same headline
It is a bold claim, but based on their success with ruff, I'm optimistic that it might pan out.
I do enjoy ruff a lot, but only time will tell
There are 14 competing standards...
have there been a lot of them?
pipx, poetry, pipsi, fades, pae, pactivate, pyenv, virtualenv, pipenv
Let’s hope this next one will be the true standard.
pyenv, virtualenv, pipenv, aren't package managers... they are virtual environment managers / creators and use pip for package management.
We're using poetry and it solves our problems. I'll have to look into uv, but I don't feel in any rush to switch away from poetry.
I’ve been mostly a poetry guy but have tested out uv a bit lately. Two main advantages I see are being able to install Python (I relied on pyenv before) and it’s waaay faster at solving/installing dependencies.
Yeah, it certainly looks nice, but my problems are:
So for me, it needs to at least have feature parity w/ poetry to seriously consider.
You should be using dockers cache mounts
https://docs.docker.com/build/cache/optimize/#use-cache-mounts
Good call. We have some other tech debt related to our docker usage, so I'll add this to the list.
uv is still faster with a cold cache
and uv does have dep groups
about the second problem, there's an issue open on writing a migration guide, but migrating manually is not too difficult.
I'm not really worried about the migration work, from what I can tell it's basically just moving a few things around. I'm more worried about losing features the team likes largely for performance reasons.
Our primary use cases are:
ruff, we'll just standardize on a version of that (like we do with poetry today)I like the syntax poetry has, but I'd be willing to use something else, like in PEP 735.
One thing we also need is a way to define additional package repos since we use an internal repo. I didn't see that called out in the PEP, and I haven't looked at uv enough to know what their plan is, but this issue seems to be intended to fix it. We specify a specific repo for a handful of packages in each project, and we need that to work as well.
I'm currently looking to use ruff to replace some of our dev tools, and I'll look back at uv in another release or two to see what the progress is on our blockers.
In my field we rely on conda and I hate it every day.
Why, out of curiosity?
We do geodata science and rely on some pretty specific C++ libraries that are only distributed via conda. While on unix-based systems it's possible to get some of them from other channels or even building them from source, we mostly have Windows machines in production where we are not that flexible. Docker is unfortunately no solution due to security concerns.
If you are asking why I hate it: It's bloated, uses more space than needed and it's rare I can reproduce an environment from the environment file without running into errors. Using it feels unintuitive, I still google command after years. It was very slow until recently, when the libmamba solver was finally integrated. Last but not least licensing is a pain in the ass.
I've been using micromamba/mamba and not had solving issues like I did with conda. Im glad conda integrated libmamba.
Question: why were docker containers deemed security risks?
If Windows, it requires a VM and currently infosec is not keen on virtualization in the hands of users.
I'm no expert, but isn't running in a VM strictly better than running on raw metal from a security perspective? It's generally more locked down, and breaking out of the virtualization layer requires a separate security breach from gaining access to the running container.
I would think so as well. Possibly it's because a local VM is harder for them to monitor.
Yes, mamba is a huge improvement. Regarding docker I can't really tell you as I'm not an infrastructure guy.
Interesting. We use conda via micromamba for my own project, as it makes the install for end-users much easier when they can just run a shell script, to install python, cuda, and all the dependencies needed.
I share the same frustration trying to replicate an environment. I'm glad I can avoid it these days, the community needs a way out of the conda lock-in.
Just tell me how uv is financed …
Got toml file support yet? Then I'm happy to talk :)
they do, just use project management commands like uv + { add, remove, sync, lock, run }
Looks like it has basic support:
required-python = "..."dependencies = [ ... ]Once it gets dependency groups, I'll try it out. I'm currently using poetry, which works, but I'm always interested in better perf.
it already has dep groups; e.g.
uv add --optional staging pytest
then
uv sync --extra staging
to install / uninstall packages accordingly.
They have a --dev shorthand for dev dependencies, but it seems the dependency group PEP is not final, so there isn't a standardized way of doing this yet.
Oh cool, I'll definitely look into that.
And honestly, the one I need more is a test group for CI, for things like coverage reporting and whatnot. If I can get that and if having multiple package indexes works properly (i.e. it can check my private repo first, and then pypi), I can probably port our projects to uv, at which point it's an internal discussion instead of a technical one.
Private PyPI too?
We're coming from poetry but it's slow and needs its own .venv, so a UV binary would be very nice.
yeah, it works with private pypi
I don't find it in the docs..how to set my PAT?
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