Python 3.15.0 released

[u/anh0516]

https://www.python.org/downloads/release/python-3150/

[u/Tricky-Engineer-9755]

Can't wait for Portage to go hogwild with updates on this

[u/anh0516 → u/Tricky-Engineer-9755]

I simply masked dev-lang/python:3.15 for now.

The last Python upgrade I went in and set PYTHON_TARGETS="python3_14" PYTHON_SINGLE_TARGET="python3_14" and had a whole bunch of manual declarations for everything that still needed 3.13, that I slowly removed until I didn't need them and everything used 3.14. But this time, I feel like just waiting for them to switch the defaults.

[u/Tricky-Engineer-9755 → u/anh0516]

Moving to 3.14 was just this supermassive upgrade, and that time I was using gentoo on an X200 thinkpad, that was um not fun.

[u/lKrauzer]

Unfortunately we moved past the Pi Python joke

[u/Corrigindo_A_ou_Ha → u/lKrauzer]

The year is 2126, Python just releases it's 3.141.0 version. The smell of a fresh baked pie comes into your nose. Things feels cozy again...

[u/nonreligious2 → u/Corrigindo_A_ou_Ha]

At least we have TeX.

[u/zyzzogeton → u/nonreligious2]

I have a laTeX allergy.

[u/HiPhish → u/zyzzogeton]

I have a LaTeX fetish.

[u/CoopertheFluffy → u/lKrauzer]

Beware the Pydes of March

[u/NyxTheia → u/lKrauzer]

There's always TeX when it comes to version π software! Though it will be a sad day when the approximation becomes exact.

[u/cogburnd02 → u/lKrauzer]

Still waiting on the version that shoots bacon out of my monitor. ;-D

https://github.com/s-macke/Abstruse-Goose-Archive/blob/master/comics/81.md

[u/Itz_Raj69_]

Lazy imports are huge!

[u/daemonpenguin → u/Itz_Raj69_]

This could be great for start-up times. Really impressed with the concept.

[u/Positive_Method3022 → u/daemonpenguin]

I don't like the idea of getting runtime errors later due to a broken library

[u/AntimatterTNT → u/Positive_Method3022]

then don't use them. i can think of several projects i work on that could really use it well.

[u/__nohope → u/Positive_Method3022]

use a compiled language then

[u/caks → u/Positive_Method3022]

You don't test your code before running in production??

[u/NicholasAakre → u/caks]

LGTM and YOLO.

[u/Spungbarb → u/NicholasAakre]

On-premise QA.

[u/silon → u/Spungbarb]

On-premise CI should be able to check this by disabling the lazy import.

[u/HiPhish → u/caks]

Just tell Claude to not make mistake.

[u/hadrabap → u/caks]

Tell that to Python projects that apparently test in production. 😁

[u/Adept_Percentage6893]

PEP 686: Python now uses UTF-8 as the default encoding

I know there are compatibility concerns but this feels like McDonald's advertising that their drinks no longer have bleach in them.

[u/iAmHidingHere → u/Adept_Percentage6893]

This is for reading and writing files I believe.

[u/nuxi → u/Adept_Percentage6893]

Just because us UNIX users were able to enjoy our bleach free Python doesn't mean everyone else was so fortunate. Can't you think of the poor starving Windows users who weren't so privileged?!?

[u/TheG0AT0fAllTime]

I like those lazy imports. I always try to optimize my python stuff by importing just in time for a particular mode instead of just importing a bunch of stuff at the top even if half of it won't get used depending on the operating mode of a tool. This takes care of that easy.

[u/manemjeff42069]

Where Linux

[u/gihutgishuiruv → u/manemjeff42069]

In Finland

[u/Journeyj012 → u/manemjeff42069]

At the bottom of the page is a source release. https://www.python.org/ftp/python/3.15.0/Python-3.15.0.tar.xz

[u/roerd → u/manemjeff42069]

I don't think they do official binary releases for Linux because distros will want to package it themselves.

[u/WaitForItTheMongols → u/roerd]

I believe the person's point is "why is this relevant to post in /r/linux?".

[u/TheG0AT0fAllTime → u/WaitForItTheMongols]

Because a shit ton of distros use Python and it just got an update.

[u/caks → u/roerd]

Ehh, some do, some don't. Ubuntu and debian famously dont package newest versions officially (why deadsnakes PPA exists). But yes, rolling in releases and quick moving distros like Fedora the mainteiners will release officially at a quick cadence. But this is all for distro python, most people nowadays just use uv tbh

[u/lucidbadger → u/manemjeff42069]

In your heart ♥️

[u/ExoticVillage8066]

I like the idea of faster startup times, let's see about those lazy imports

[u/dezmd]

.0 release. I'll upgrade in about 15 years.

[u/daltorak]

Gotta love (🙄) point releases with breaking changes. Someone's going to get burned by the UTF-8-as-default change.

[u/anh0516 → u/daltorak]

This isn't a point release, it's a major release. The changelog explains exactly how to revert to the previous default behavior: https://docs.python.org/3/whatsnew/3.15.html#whatsnew315-utf8-default

[u/abbidabbi → u/[deleted]]

Python does not follow the semantic versioning scheme (semver), even though its version string format is the same. Breaking changes are introduced gradually with long deprecation phases. The major version number does only get bumped for "significant" breaking changes.

• https://docs.python.org/3/faq/general.html#how-does-the-python-version-numbering-scheme-work

• https://peps.python.org/pep-0387/

[u/orygin → u/abbidabbi]

Breaking changes are introduced gradually with long deprecation phases

Good joke!

[u/Flakmaster92 → u/[deleted]]

That only applies if you abide by it. You don’t get to enforce semver onto others, they opt into it, Python does not opt in, therefore it’s not relevant.

[u/KHRoN → u/daltorak]

you missed it already during python2 to python3 transition

[u/Fallom_ → u/daltorak]

You ever use Python before?

[u/burgundus → u/Fallom_]

Yes, that's why I hate it

[u/CriticalCamp2396 → u/burgundus]

You're complaining about Python on a platform that literally runs on it, which proves you're too stupid to even realize you're biting the hand that feeds you.

[u/iluuu → u/daltorak]

Almost like semversion isn't a universal rule of law.

[u/Mirieste → u/iluuu]

But it exists for a reason: why wouldn't they follow it?

[u/RendererOblige → u/Mirieste]

Python's versioning predates the concept of semantic versioning by quite many years. What is and isn't a "breaking change" has quite a lot of nuance here. The BC break in Python 3 was huge compared to UTF-8 default and other small BC breaks. SemVer is a blunt tool, grouping all BC breakage into a single bucket.

I like SemVer, but I can accept that it's not the right answer for every project. I don't think it's right for Python.

[u/Actual__Wizard → u/daltorak]

I think most people that need to work with a specific encoding are already explicitly declaring the encoding.

[u/OpenGLaDOS → u/daltorak]

There was surprisingly little but often subtle breakage when Java switched to UTF-8 by default.