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Uv is the best thing to happen to the Python ecosystem in a decade

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Re: Uv is the best thing to happen to the Python ecosystem in a decade

#41

Post by gegtik »

athorax wrote: post #12
andrewstuart wrote: post #5

Venv seems pretty straightforward once you’ve learned the one activate command. I don’t really get that uv solves all these problems ve never encountered. Just make a venv and use it seems to work fine.

For me the biggest value of uv was replacing pyenv for managing multiple versions of python. So uv replaced pyenv+pyenv-virtualenv+pip

Yes. poetry & pyenv was already a big improvement, but now uv wraps everything up, and additionally makes "temporary environments" possible (eg. `uv run --with notebook jupyter-notebook` to run a notebook with my project dependencies)

Wonderful project

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#42

Post by d4mi3n »

LeoPanthera wrote: post #18

For single-file Python scripts, which 99% of mine seem to be, you can simplify your life immensely by just putting this at the top of the script: #!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.11" # dependencies = [ "modules", "here" ] # /// The script now works like a standalone executable, and uv will magically install and use the specified modules.

If I were to put on my security hat, things like this give me shivers. It's one thing if you control the script and specified the dependencies. For any other use-case, you're trusting the script author to not install python dependencies that could be hiding all manner of defects or malicious intent.

This isn't a knock against UV, but more a criticism of dynamic dependency resolution. I'd feel much better about this if UV had a way to whitelist specific dependencies/dependency versions.

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#43

Post by [deleted] »

atonse wrote: post #29

These rust based tools really change the idea of what's possible (when you can get feedback in milliseconds). But I'm trying to figure out what Astral as a company does for revenue. I don't see any paid products on their website. They even have investors. So far it seems like they have a bunch of these high performance tools. Is this part of an upcoming product suite for python or something? Just curious. I'm not a f…

[deleted]

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#44

Post by tabletcorry »

sdairs wrote: post #39

Everything from the astral team has been superb, I don't want to use Python without ruff & uv. Yet to try "ty", anyone used it?

Ty is still under very active development, so it either works or very much doesn't. I run it occasionally to see if it works on my codebases, and while it is getting closer, it isn't quite there yet.

Definitely lightyears faster than mypy though.

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#45

Post by brcmthrowaway »

verdverm wrote: post #11

I'd put type annotations and GIL removal above UV without a second thought. UV is still young and I hit some of those growing pains. While it is very nice, I'm not going to put it up there with sliced bread, it's just another package manager among many

What happend with GIL-removal

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#46

Post by kardos »

LeoPanthera wrote: post #18

For single-file Python scripts, which 99% of mine seem to be, you can simplify your life immensely by just putting this at the top of the script: #!/usr/bin/env -S uv run --script # /// script # requires-python = ">=3.11" # dependencies = [ "modules", "here" ] # /// The script now works like a standalone executable, and uv will magically install and use the specified modules.

> uv will magically install and use the specified modules.

As long as you have internet access, and whatever repository it's drawing from is online, and you may get different version of python each time, ...

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#47

Post by karlding »

curiousgal wrote: post #10

The best thing to happen to the Python ecosystem would be something that unites pip and conda. Conda is not going anywhere given how many packages depend on non-python binaries, especially in enterprise settings.

I'm not sure if you're aware, but there's the Wheel Variants proposal [0] that the WheelNext initiative is working through that was presented at PyCon 2025 [1][2], which hopes to solve some of those problems.

uv has implemented experimental support, which they announced here [3].

[0] https://wheelnext.dev/proposals/pepxxx_wheel_variant_support...

[1] https://us.pycon.org/2025/schedule/presentation/100/

[2] https://www.youtube.com/watch?v=1Oki8vAWb1Q

[3] https://astral.sh/blog/wheel-variants

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#48

Post by mystifyingpoi »

hollow-moe wrote: post #15

curl|sh and iwr|iex chills my spine, no one should recommend these methods of installation in 2025. I'm against closed computers but I'm also against reckless install. Even without the security concerns these way of installation tends to put files in a whole random places making it hard to manage and cleanup.

While I do share the sentiment, I firmly believe that for opensource, no one should require the author to distribute their software, or even ask them to provide os-specific installation methods. They wrote it for free, use it or don't. They provide a handy install script - don't like it? sure, grab the source and build it yourself. Oops, you don't know what the software does? Gotta read every line of it, right?

Maybe if you trust the software, then trusting the install script isn't that big of a stretch?

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#49

Post by tabletcorry »

asaddhamani wrote: post #37

I find the python tooling so confusing now. There’s pip, virtualenv, pipx, uv, probably half a dozen others I’m missing. I like node, npm isolates by default, npx is easy to understand, and the ecosystem is much less fragmented. I see a python app on GitHub and they’re all listing different package management tools. Reminds me of that competing standards xkcd.

Node has at least bun, and probably other tools, that attempt to speed things up in similar ways. New tooling is always coming for our languages of choice, even if we aren't paying attention.

Re: Uv is the best thing to happen to the Python ecosystem in a decade

#50

Post by daedrdev »

kyt wrote: post #21

I must be the odd man out but I am not a fan of uv. 1. It tries to do too many things. Please just do one thing and do it well. It's simultaneously trying to replace pip, pyenv, virtualenv, and ruff in one command. 2. You end up needing to use `uv pip` so it's not even a full replacement for pip. 3. It does not play well with Docker. 4. It adds more complexity. You end up needing to understand all of these new enviro…

I mean I’ve had quite awful bugs from using pip pyenv and venv at the same time
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