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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•1y 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!

InterstellOr's Space Tourism Capsule Makes Progress, Books More Customers

https://www.china-in-space.com/p/interstellors-space-tourism-capsule
1•JPLeRouzic•27s ago•0 comments

Show HN: Portable Kokoro TTS binary with g2p, normalizer, lexicon, and guesser

https://github.com/RobViren/kokoallovero
1•robviren•1m ago•0 comments

Discourse – the tech forum for the modern era

https://discourse.cosign.co
2•zachtdavidson•2m ago•1 comments

U.S. creates Autonomous Warfare Command to fuse and enhance military drone ops

https://defensescoop.com/2026/09/30/hegseth-announces-autonomous-warfare-command/
1•snarky-comments•3m ago•0 comments

Eight Years On, Cambridge Analytica Scandal Catches Up with Meta in Santa Fe

https://www.techpolicy.press/eight-years-on-cambridge-analytica-scandal-catches-up-with-meta-in-s...
1•speckx•3m ago•0 comments

Updates to Full Disk Access in macOS

https://developer.apple.com/news/?id=p6zjojqw
1•notfirstpost•5m ago•0 comments

Mathematicians and Muse Spark collaborate on 6 research papers

https://research.meta.ai/blog/solving-open-research-problems-together
1•tejaspatil_135•5m ago•0 comments

What tools do you wish existed?

1•ajmt•5m ago•0 comments

Show HN: Open-source Git server that runs on Cloudflare Workers

https://github.com/choyiny/gitorange
2•choyiny•8m ago•0 comments

Why didn't we get GPT-2 in 2005?

https://dynomight.net/gpt-2/
2•bilsbie•10m ago•1 comments

The weirdest bug I've ever encountered

https://mental-reverb.com/blog.php?id=29
1•birdculture•10m ago•0 comments

Ask HN: Why can AI solve Navier-Stokes but not write in a human-like way?

1•amichail•11m ago•0 comments

Make Tmux the OS

https://matduggan.com/what-does-my-dream-os-ui-look-like/
2•weaksauce•12m ago•0 comments

Teaching Paradox: Hearts of Iron IV, Part IIIa: Focusing on Politics

https://acoup.blog/2026/10/02/teaching-paradox-hearts-of-iron-iv-part-iiia-focusing-on-politics/
1•Tomte•13m ago•0 comments

Cezar runs agents 24/7 on your server. Open source

https://cezar.run/
1•tkarwatka-ok•13m ago•0 comments

Maximum efficiency: Automated QA and content building in a single pass

https://lopsy.art/blog/autonomous-qa-and-content-building/
2•theseamusjames•13m ago•0 comments

No Emails Please

https://zaferbalkan.com/no-emails-please/
2•feldrim•14m ago•0 comments

California AB 2047 (3D Printer law) enacted

https://www.billtrack50.com/billdetail/1974210
2•nvahalik•15m ago•0 comments

Muse Gadgets

https://gadgets.muse.ai
5•anant•15m ago•0 comments

Has anyone tried Instinct's Personal Assistant?

1•Nik_26•15m ago•2 comments

Preview mobile apps inside Claude chat and iterate

https://mcp.slidedevai.com/index.html
1•JsNeil•16m ago•0 comments

Muse Gadgets

https://gadgets.museai.com/
1•anant•16m ago•1 comments

Amazon to invest $1B into data center communities amid backlash

https://techxplore.com/news/2026-10-amazon-invest-1b-center-communities.html
1•geox•17m ago•1 comments

Llmtobinary – a hypothetical chip "design", custom instruction set, might work

https://llmtobinary.com?hn
1•thomasfromcdnjs•18m ago•1 comments

Automated legal matters – from start to finish

https://lexifina.com/blog/fully-automated-legal-matters
2•alansaber•18m ago•0 comments

Gluon: Static, type inferred and embeddable language written in Rust

https://gluon-lang.org/
2•xlii•19m ago•0 comments

Full Tuck: A Wingspan Podcast

https://open.spotify.com/show/3xkRJ5NzIkYX96QGzLEVDL
2•silver92bullet•19m ago•0 comments

The Catholic Church vs. the Turing Test (2025)

https://twitchard.github.io/posts/2025-06-28-the-catholic-church-vs-the-turing-test.html
2•twitchard•20m ago•0 comments

Show HN: Open-Source M&A Tools

https://opensource.mainstreetwealth.ai
3•novateg•20m ago•0 comments

Hardly Promethean

https://jardo.dev/hardly-promethean
4•ibobev•23m ago•0 comments