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Switching from Pyenv to Uv

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Re: Switching from Pyenv to Uv

#81

Post by actinium226 »

quickslowdown wrote: post #15

I highly, highly recommend uv. It solves & installs dependencies incredibly fast, and the CLI is very intuitive once you've memorized a couple commands. It handles monorepos well with the "workspaces" concept, it can replace pipx with "uv tool install," handle building & publishing, and the docker image is great, you just add a FROM line to the top and copy the bin from /uv. I've used 'em all, pip + virtualenv, conda…

The script thing is great. By the way those 'oddly formatted' comments at the top are not a uv thing, it's a new official Python metadata format, specifically designed to make it possible for 3rd party tools like uv to figure out and install relevant packages.

And in case it wasn't clear to readers of your comment, uv run script.py creates an ephemeral venv and runs your script in that, so you don't pollute your system env or whatever env you happen to be in.

Re: Switching from Pyenv to Uv

#82

Post by AlphaSite »

maleldil wrote: post #77
TheIronYuppie wrote: post #68

For scripting... HIGHLY recommend putting your dependencies inline. E.g.: #!/usr/bin/env python3 # /// script # requires-python = ">=3.11" # dependencies = [ # "psycopg2-binary", # "pyyaml", # ] # /// Then - uv run -s file.py

How does this interact with your code editor or IDE? When you edit the file, where does the editor look for information about the imported third-party libraries?

Usually the VENV and import lines are enough

Re: Switching from Pyenv to Uv

#83

Post by loeber »

IshKebab wrote: post #29

Uv really fixes Python. It takes it from "oh god I have to fight Python again" to "wow it was actually fast and easy". I think all the other projects (pyenv, poetry, pip, etc.) should voluntarily retire for the good of Python. If everyone moved to Uv right now, Python would be in a far better place. I'm serious. (It's not going to happen though because the Python community has no taste.) The only very minor issue I'v…

Strong agree. The respectful act of other package managers would be consider themselves deprecated and point to uv instead.

Re: Switching from Pyenv to Uv

#84

Post by bigfatfrock »

I converted along with most of the people in this thread.

IMO no really hard problem is ever truly solved but as can be seen in other comments, this group of people really crushed the pain of me and *many* others, so bravo alone on that - you have truly done humanity a service.

Re: Switching from Pyenv to Uv

#85

Post by xenophonf »

What does uv offer over bog-standard setuptools, pip, pip-tools, and build?

Right now, the only thing I really want is dependency pinning in wheels but not pyproject.yaml, so I can pip install the source and get the latest and greatest, or I can pip install a wheel and get the frozen dependencies I used to build the wheel. Right now, if I want the second case, I have to publish the requirements.txt file and add the wheel to it, which works but is kind of awkward.

Re: Switching from Pyenv to Uv

#86

Post by 77ko »

uv is excellent! The only think I'm missing is an easy way to update all packages in an env, something like `uv update --all` or `uv update plotly`.

Which would fit in with existing uv commands[1] like `uv add plotly`.

There is an exisiting `uv lock --upgrade-package requests` but this feels a bit verbose.

[1]: https://docs.astral.sh/uv/guides/projects/#creating-a-new-pr...

Re: Switching from Pyenv to Uv

#87

Post by tootie »

IshKebab wrote: post #29

Uv really fixes Python. It takes it from "oh god I have to fight Python again" to "wow it was actually fast and easy". I think all the other projects (pyenv, poetry, pip, etc.) should voluntarily retire for the good of Python. If everyone moved to Uv right now, Python would be in a far better place. I'm serious. (It's not going to happen though because the Python community has no taste.) The only very minor issue I'v…

Every time people have debates over the merits of languages I always put developer environment at the top of my list. Build tools, IDE, readable stack traces. Those things boost productivity for more than concise list comprehensions or any gimmicky syntax thing. It's why Python always felt stone age to me despite have such lovely semantics.

Re: Switching from Pyenv to Uv

#88

Post by zahlman »

> Maybe I installed some other things for some reason lost in the sands of time.

FWIW, I was able to confirm that the listed primary dependencies account for everything in the `pip freeze` list. (Initially, `userpath` and `pyrsistent` were missing, but they appeared after pinning back the versions of other dependencies. The only project for which I couldn't get a wheel was `python-hglib`, which turned out to be pure Python with a relatively straightforward `setup.py`.)

Re: Switching from Pyenv to Uv

#89

Post by para_parolu »

quickslowdown wrote: post #15

I highly, highly recommend uv. It solves & installs dependencies incredibly fast, and the CLI is very intuitive once you've memorized a couple commands. It handles monorepos well with the "workspaces" concept, it can replace pipx with "uv tool install," handle building & publishing, and the docker image is great, you just add a FROM line to the top and copy the bin from /uv. I've used 'em all, pip + virtualenv, conda…

As a person who don’t work often on python code but occasionally need to run server or tool I find UV blessing. Before that I would beg people to help me just not to figure out what combination of obscure python tools I need. Now doing “uv run server.py” usually works.

Re: Switching from Pyenv to Uv

#90

Post by zahlman »

surfingdino wrote: post #64

So... I am switching a project from pip to uv. I am hoping for things to be "better", but so far it's been a bit of a familiar "why does it not work as described?" journey.

Could you give some detail on things you've found that still don't work as described?
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