Stefan Scherfke
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stefan.sofa-rockers.org
Stefan Scherfke
@stefan.sofa-rockers.org
36 followers 30 following 33 posts
Python engineer at energy & meteo systems, maintainer of Typed Settings
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stefan.sofa-rockers.org
Just released #TypedSettings 25.3.0 🎉

Changes
- Extract attribute docstrings and use them as CLI help texts (thx to a snippet from @davidism.bsky.social).
- Support dotenv (.env) files
- detect competing usages of the Click context object

typed-settings.readthedocs.io/en/latest/ch...
Changelog - Typed Settings
typed-settings.readthedocs.io
November 29, 2025 at 10:18 PM
Reposted by Stefan Scherfke
xkcd.com
Fifteen Years

xkcd.com/3172/
Comic. Panels up to the 10-year point are grayed out. New panels since the Ten Years comic, which chronicles the first ten years of PERSON 1's journey with cancer: (1) [two people in bed] PERSON 1 (woman): One more chapter? PERSON 2 (man): Don’t we both have to get up early? PERSON 1: Nnnnnggggh PERSON 2: Sure, good point. (2) [many people wearing masks, walking while looking at graphs on their phones] (3) [birds landing on people] PERSON 2 in beanie and scarf: Hah! They like *my* seeds best. PERSON 1 in scarf holding phone with a bird sitting on it: Wait, how do I take a picture of this one? (4) [two people rowing boats with tree landscape] (5) [Person 1 carries overflowing stack of things to Person 2 in bed] PERSON 1: I brought you honey lemon tea, more pillows, a cinnamon roll, Tylenol, another blanket, a– PERSON 2: It was just Appendicitis, I’m really– PERSON 1: *It is my turn to take care of you and I am going to do it right!* (6) [Two people in car] (7) [still in car) PERSON 1: Oh my god. PERSON 2: Oh my god. (8) [car driving] PERSON 1: Pull over! PERSON 2: I am! (9) [both people get out of car] (10) [Large colored panel of aurora borealis over water with both people looking on] (11) [Person 1 sits against tree while Person 2 lies on the ground] PERSON 1: Fifteen years. No sign of the cancer. (12) I *am* having some weird symptoms. Joint pain. Fatigue. I think I’m losing my close-up vision. PERSON 2: Yeah. Me too. (13) PERSON 2: I think we’re getting old. (14) PERSON 1: I guess that’s okay. PERSON 2: It’s all I wanted.
November 26, 2025 at 10:32 PM
stefan.sofa-rockers.org
I finally manged to get working winbars in #neovim that only appear in actual files (but not in quickfix or term) and which also show LSP breadcrumps if available. And they are also slightly dimmed for inactive buffers.

gitlab.com/sscherfke/do...

#neovim #lualine #lspsaga #lsp
November 14, 2025 at 8:58 PM
Reposted by Stefan Scherfke
pytest.org
pytest 9.0 just released!

Notable changes:
* subtests support
* Native TOML configuration
* Progress output in the terminal taskbar

And others. Check the changelog: docs.pytest.org/en/stable/ch...
Changelog - pytest documentation
docs.pytest.org
November 8, 2025 at 8:07 PM
stefan.sofa-rockers.org
Just released #TypedSettings 25.2.0! 🎉

It no longer needs to call `os.chdir()` to resolve relative paths, which could lead to problems under specific (but rare) conditions.

It also drops support for Python 3.9.

typed-settings.readthedocs.io/en/latest/ch...
Changelog - Typed Settings
typed-settings.readthedocs.io
October 26, 2025 at 8:59 PM
stefan.sofa-rockers.org
🎉 Just released #TypedSettings 25.1.0 🎉

It now uses field aliases of defined and adds support for new types: re.Pattern/re.compile(), Path subtypes, Literal and TS’s Secret type. It also officially supports #Python 3.14.

Thanks to all contributors!

typed-settings.readthedocs.io/en/latest/ch...
Changelog - Typed Settings
typed-settings.readthedocs.io
September 30, 2025 at 10:30 AM
Reposted by Stefan Scherfke
judy.co.uk
Another highlight from #PyConUK!

Katie Bickford gives a junior's perspective on doing difficult things. Contains advice for both junior developers *and* (importantly) the senior developers working with them! This is a topic that doesn't normally get enough airtime.

youtu.be/7yfGMMei0b8?...
PYCON UK 2025: A junior's perspective why doing difficult things is good, Katie Bickford
YouTube video by PyCon UK
youtu.be
September 25, 2025 at 11:39 AM
stefan.sofa-rockers.org
Good keynote by @hynek.me. Can recommend. 👌 www.youtube.com/watch?v=gDvw...

#PyConUK
PYCON UK 2025 Friday Keynote: Python's True Superpower, Hynek Schlawack
YouTube video by PyCon UK
www.youtube.com
September 22, 2025 at 6:26 PM
stefan.sofa-rockers.org
(1/2) #neovim tip:

Render Python strings in "*TEMPLATE*" variables as Jinja using treesitter injections.

1. Make sure that "jinja" and "jinja_inline" are available for treesitter.
September 13, 2025 at 6:32 PM
stefan.sofa-rockers.org
🎉 I just released #TypedSettings 25.0.0 – the first release this year and since last November. It adds support for "Mapping", "IntEnum", and "StrEnum", increases flexiblity and documentation of nested settings, and, finally, improves error handling. typed-settings.readthedocs.io/en/latest/ch...
Changelog - Typed Settings
typed-settings.readthedocs.io
July 25, 2025 at 9:20 PM
Reposted by Stefan Scherfke
hynek.me
Almost 4 months later, here it finally is:

uv: Making Python Local Workflows Fast and Boring in 2025

youtube.com/watch?v=TiBI... 1/3
https://youtube.com/watch?v=TiBIjouDGuI…
July 6, 2025 at 6:44 PM
Reposted by Stefan Scherfke
hugovk.dev
Just released: Python 3.14.0 beta 2! 🚀🐍

🥧 Deferred type annotation evaluation!
🥧 T-strings!
🥧 Zstandard!
🥧 Syntax highlighting in the REPL!
🥧 Colour in unittest, argparse, json and calendar CLIs!
🥧 UUID v6-8!
🥧 And much more!

discuss.python.org/t/python-3-1...

#Python #CPython #Python314 #release
Python 3.14.0 beta 2 is here!
Here’s the second 3.14 beta. https://www.python.org/downloads/release/python-3140b2/ This is a beta preview of Python 3.14 Python 3.14 is still in development. This release, 3.14.0b2, is the second...
discuss.python.org
May 26, 2025 at 7:44 PM
Reposted by Stefan Scherfke
crmarsh.com
Today, we’re announcing the preview release of ty, an extremely fast type checker and language server for Python, written in Rust.

In early testing, it's 10x, 50x, even 100x faster than existing type checkers. (We've seen >600x speed-ups over Mypy in some real-world projects.)
May 13, 2025 at 5:00 PM
Reposted by Stefan Scherfke
xkcd.com
PhD Timeline xkcd.com/3081
April 25, 2025 at 3:32 PM
Reposted by Stefan Scherfke
nedbat.com
Among the many oddities in YAML is the variety of string formatting options. Here's a site that explains them: yaml-multiline.info
YAML Multiline Strings
Find the right syntax for your YAML multiline strings.
yaml-multiline.info
April 17, 2025 at 1:53 PM
Reposted by Stefan Scherfke
xkcd.com
Tariffs xkcd.com/3073
April 8, 2025 at 12:03 AM
Reposted by Stefan Scherfke
simonwillison.net
Tell me your team is entirely comprised of over-confident twenty-somethings without telling me your team is entirely comprised of over-confident twenty-somethings
March 28, 2025 at 2:20 PM
Reposted by Stefan Scherfke
neovim.io
#neovim 0.11 is out!

- List of notable changes since 0.10: neovim.io/doc/user/new...
- Summary blog post: gpanders.com/blog/whats-n...
- Release binaries: github.com/neovim/neovi...

Thank you all for the support! More things to come in 0.12!
News-0.11 - Neovim docsNeovim
Neovim user documentation
neovim.io
March 26, 2025 at 3:20 PM
Reposted by Stefan Scherfke
hynek.me
Finally, here's attrs 25.2.0: vroom–vroom edition! attrs always had impressive runtime performance because we generate optimal code for your configuration. But now @tinche.bsky.social also made this code gen 30–50% faster!

This is the last version to support Python 3.8.

github.com/python-attrs...
Release 25.2.0 · python-attrs/attrs
Highlights Vroom–vroom edition! attrs had always impressive runtime performance because we generate optimal code for your configuration. But now, said code generation is 30–50% faster, too! This is...
github.com
March 12, 2025 at 10:03 AM
Reposted by Stefan Scherfke
pytest.org
Hi everyone,

Just to announce that the handle bsky.app/profile/nico... is not Bruno, but an impersonator. That account has already been reported.

Bruno can be reached at bsky.app/profile/soli....
bsky.app
February 23, 2025 at 1:45 AM
stefan.sofa-rockers.org
#UV is just pure awesomeness. Combined with #TypedSettings, it’s sooo easy to write a CLI. Also #rich. 🤩
A simple Python CLI with Typed Settings and Rich. The shebang "#!/usr/bin/env -S uv run --script" will invoke "uv" which creates a temporary environment containing all dependencies specified in the script meta block below.
February 23, 2025 at 10:30 AM
Reposted by Stefan Scherfke
tinche.bsky.social
I just released quattro 25.1.0. The biggest change is the addition of `create_background_task` to our TaskGroup class.

Background tasks are similar to normal tasks, but they don't block the TaskGroup exit. Instead, they get cancelled if they're still running.
February 21, 2025 at 10:35 PM
Reposted by Stefan Scherfke
chris.withers.org
sybil 9.1.0 released! It's a #python tool for testing examples in documentation and source code: sybil.readthedocs.io/en/latest/
February 18, 2025 at 6:31 PM
Reposted by Stefan Scherfke
hynek.me
https://codspeed.io is pretty cool and class creation will be 38–52% faster in attrs 25.2.0

https://github.com/python-attrs/attrs/pull/1407
CodSpeed showing PR performance improvements between 38% for frozen class to 52% for make_class.
February 16, 2025 at 9:50 AM
Reposted by Stefan Scherfke
mathspp.com
How to create a Python CLI that's globally available in your system in 5 easy steps.

1. Install uv
2. Init project with `uv init --app --package mycli`
3. Write code
4. Install with `uv tool install . -e`
5. Use `mycli` anywhere in your computer
February 11, 2025 at 11:07 AM