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Show HN: Reaktiv – I built Excel-like reactive programming for Python

https://bui.app/when-frontend-reactivity-meets-backend-python-the-story-of-my-first-1-000-download-library/
2•buibuibui•6mo ago
Hi HN! I created Reaktiv, a Python library bringing reactive programming to the backend world that recently hit 1,000+ monthly downloads.

I'm actively promoting it because I believe signal-based reactivity (a concept that spread rapidly in frontend development) has huge untapped potential in Python. My breakthrough came when I stopped describing it as "Angular signals for Python" and started calling it "Excel-like computation graphs" - suddenly Python developers understood the value.

The library automatically tracks dependencies between computations, only recalculating values when dependencies change. This eliminates manual dependency tracking, prevents synchronization bugs, and reduces cognitive load when managing complex state.

Interestingly, I've noticed some initial interest from data scientists, though I'm still exploring what specific problems it might solve for them. I also believe the Home Assistant/IoT communities could benefit greatly from this approach.

Would love your thoughts on bringing frontend patterns to backend development!

Show HN: Radioactive Pooping Knights

https://minichessgames.com/#/play/pooping-knights
2•patrickdavey•7m ago•0 comments

Mock Roles, not Objects (2004) [pdf]

https://jmock.org/oopsla2004.pdf
1•n3t•8m ago•0 comments

I cracked a $200 software protection with xcopy

https://www.ud2.rip/blog/enigma-protector/
2•vmfunc•13m ago•1 comments

New Study Investigates How Diet May Slow Normal Brain Aging

https://www.bumc.bu.edu/camed/news-events/articles/2025/new-study-investigates-how-diet-may-slow-...
1•gslin•13m ago•0 comments

EU hits X with €120M fine for breaching the Digital Services Act

https://www.dw.com/en/eu-imposes-120-million-fine-on-elon-musks-x-for-breaking-digital-rules/a-75...
3•vincvinc•19m ago•0 comments

Windows Telemetry

https://sizeof.cat/post/windows-telemetry/
1•DustinEchoes•20m ago•0 comments

India backs off from requiring government-made security app

https://www.scworld.com/news/india-backs-off-from-requiring-government-made-security-app
1•Bender•25m ago•1 comments

Sandvik gets €500M from European Investment Bank for new, smart EVs

https://electrek.co/2025/12/05/sandvik-gets-e500m-from-european-investment-bank-for-new-smart-evs/
1•Bender•25m ago•0 comments

Ultrablack wool textiles inspired by hierarchical avian structure

https://www.nature.com/articles/s41467-025-65649-4
2•defrost•33m ago•1 comments

Five hundred reasons to not use Microsoft Azure

https://azsh.it/500
4•bsoqqb•39m ago•0 comments

State of decay in self-hosted commenting (code review)

https://bykozy.me/blog/state-of-decay-in-self-hosted-commenting/
1•byko3y•47m ago•0 comments

HTML Kong (2016)

https://www.xn--8ws00zhy3a.com/blog/2016/07/html-kong#f16.1
1•mmulet•48m ago•1 comments

DeslopifAI – Remove AI Slop

4•haeli05•56m ago•0 comments

Show HN: NanoAI – Unified AI Image Workspace (Generation, Inpainting, Upscaling)

https://nanoai.run
1•Li_Evan•57m ago•0 comments

Show HN: macOS Window Managers Directory

https://macoswm.com/
1•j0r0b0•1h ago•0 comments

Ask HN: What is the future of SaaS when things are this easy to build?

2•fbrncci•1h ago•0 comments

Making WebAssembly and Wasmtime More Portable (2024)

https://bytecodealliance.org/articles/wasmtime-portability
2•apitman•1h ago•0 comments

Data Centers Are a 'Gold Rush' for Construction Workers

https://www.wsj.com/business/data-centers-are-a-gold-rush-for-construction-workers-6e3c5ce0
1•lxm•1h ago•0 comments

A 2,500-year lineage of daemon-like naming conventions, from antiquity to AI

2•troyka•1h ago•0 comments

Mark Zuckerberg rebranded for metaverse. $70B in losses, he's moving on

https://fortune.com/2025/12/05/mark-zuckerberg-metaverse-layoffs-cuts-facebook-rebrand/
3•nsoonhui•1h ago•3 comments

Purpose from First Principles

https://planktonvalhalla.com/20251204-purpose-from-first-principles/
1•mrcgnc•1h ago•0 comments

Hitachi Cooling and Heating Innovations with Heat Pump Tech at AHR 2025 [video]

https://www.youtube.com/watch?v=tkxiW5kd7Xc
1•teleforce•1h ago•0 comments

Hitachi Heat Pumps and Domestic Hot Water (DHW)

https://www.hitachiaircon.com/ranges/heating
1•teleforce•1h ago•0 comments

Driving Xiaomi's Electric Car: Are We Cooked? [video]

https://www.youtube.com/watch?v=Mb6H7trzMfI
1•colonCapitalDee•1h ago•0 comments

Show HN: A Web UI Generator for Rust CLI Projects

https://github.com/wb14123/clap-web-gen
1•wb14123•1h ago•0 comments

Waymo investigated for ongoing failures to stop for school busses

https://www.thestreet.com/technology/waymo-investigation-could-stop-autonomous-driving-in-its-tracks
9•toss1•1h ago•0 comments

Show HN: Day 0 of Walkable Infrastructure

1•duane_powers•1h ago•0 comments

Linux Founder Linus Torvalds Defends Windows' Blue Screens of Death

https://www.pcworld.com/article/3002074/linux-founder-linus-torvalds-defends-windows-blue-screens...
1•teleforce•1h ago•0 comments

Drosophila Brain Model

https://github.com/philshiu/Drosophila_brain_model
1•throwaway2027•1h ago•0 comments

Linux is the future of gaming – Gabe Newell, 2013 at LinuxCon [video]

https://www.youtube.com/watch?v=yeCuasjxsWk
4•embedding-shape•1h ago•0 comments