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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!

Canadian AI company turns away from U.S. government work amid trade tensions

https://globalnews.ca/news/12098107/canadian-ai-company-caseway-turns-away-u-s/
1•ClearwayLaw•43s ago•1 comments

The X Subscription

https://x.ai/news/x-subscription
2•JustSkyfall•6m ago•0 comments

Why AI doesn't make companies more productive

https://www.computerworld.com/article/4215022/why-ai-doesnt-make-companies-more-productive.html
1•nobody9999•11m ago•0 comments

Veda: First AI Agentic Hobby OS

https://github.com/vahmoh25/Veda/blob/main/README.md
2•vahmohh2•11m ago•0 comments

I built a new feature for my blog using my voice

https://simonw.substack.com/p/i-built-a-new-feature-for-my-blog
1•cocacola1•11m ago•0 comments

I made some light weight unity C# code editor

https://github.com/CodyDream/VelvetSharp
1•pkmgjyiuk•12m ago•0 comments

I update my projects easily

https://cx-shipd.netlify.app
1•CX-Designs•12m ago•0 comments

OpenKylin: The AI Agent Linux Desktop

https://techstrong.ai/articles/openkylin-the-ai-agent-linux-desktop/
1•CrankyBear•20m ago•0 comments

AWS Lambda Web Functions

https://aws.amazon.com/blogs/aws/announcing-aws-lambda-web-functions-for-fast-consistent-web-app-...
1•squiwardStan5•25m ago•0 comments

The First Social Network

https://www.newyorker.com/magazine/2026/10/19/the-first-social-network
1•tintinnabula•27m ago•0 comments

They War-Gamed Dimming the Sun. It Went Worse Than You Think

https://web.archive.org/web/20261012120609/https://www.wired.com/story/they-war-gamed-dimming-the...
1•bcaulfield•28m ago•0 comments

NASA may have proof life once existed on Mars

https://www.cnn.com/2026/10/12/science/nasa-mars-sample-return-sapphire-canyon-china
3•alcover•31m ago•2 comments

Lever House

https://en.wikipedia.org/wiki/Lever_House
1•brudgers•33m ago•0 comments

Voyager Earth – animated travel route maps rendered in the browser

https://www.nassau.se/voyager_earth
1•Duckish•33m ago•0 comments

The Tetrad Tour, Part III: Why AI Needs Its Linnaeus

https://samirvarma.substack.com/p/the-tetrad-tour-part-iii-why-ai-needs
1•paulpauper•33m ago•0 comments

An Industrial Policy for Drones

https://thedispatch.com/newsletter/dispatch-markets/industrial-policy-drones-economics-national-s...
1•paulpauper•34m ago•0 comments

Neocloud Endgame

https://www.banyanlaneresearch.com/p/neocloud-endgame
1•paulpauper•34m ago•0 comments

Empirical Computation: Prompting versus Programming [pdf]

https://mboehme.github.io/paper/ASE26-empirical.pdf
1•matt_d•34m ago•0 comments

Japan declares a "state of emergency in cyberspace" as cyberattacks surge

https://twitter.com/Polymarket/status/2109748239931150347
2•jaekwon•35m ago•0 comments

Claude Notify – Desktop Notifications for Claude Code on Windows

https://github.com/YairDaniel11/claude-notify
1•YairDaniel11•35m ago•0 comments

Portless: Vercel Labs Replaces Localhost Ports with Named URLs

https://themenonlab.blog/blog/portless-vercel-named-localhost-urls
1•olalonde•40m ago•0 comments

Ukraine strikes didn't blow up Russian disinformation on social

https://www.machinesociety.ai/p/no-ukraine-strikes-didnt-blow-up
3•mikelgan•46m ago•3 comments

Breaking Bad star RJ Mitte dies aged 34

https://news.sky.com/story/breaking-bad-star-rj-mitte-dies-aged-34-13598332
28•austinallegro•47m ago•2 comments

RenkuOS (A Fork of Haiku)

https://renkuos.org/
1•airhangerf15•49m ago•0 comments

What I've been seeing lately

https://mei.puppycat.house/w/seeing-261010
1•wrxd•50m ago•0 comments

Adm Programming Language

https://github.com/admlang
3•cthackers•53m ago•0 comments

Patching Zig's Std

https://marler8997.github.io/blog/zig-patch/
2•ingve•53m ago•0 comments

UK data centre giant removed evidence of China deal ahead of $35B listing

https://www.telegraph.co.uk/business/2026/10/10/uk-data-centre-giant-removed-evidence-of-china-de...
2•ilamont•53m ago•0 comments

What the Greeks Would Call Our Government [video]

https://www.youtube.com/watch?v=205IdzGJMJs
1•verdverm•54m ago•0 comments

Orion2re: A restoration effort for the Master of Orion II game engine

https://github.com/orion2re/orion2re/
3•JohnHammersley•55m ago•0 comments