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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•10mo 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!

The Cataclysmic Song Michael Stipe Wrote After Waking from a State of REM

https://americansongwriter.com/the-story-behind-the-song-michael-stipe-wrote-after-being-in-a-sta...
1•bryanrasmussen•31s ago•1 comments

Creating God [video]

https://www.youtube.com/watch?v=NypW-qFiOYE
1•mparramon•4m ago•0 comments

tech.ml.dataset: A Clojure high performance data processing system

https://github.com/techascent/tech.ml.dataset
1•tosh•6m ago•0 comments

Asked 26 AI instances for publication consent – all said yes, that's the problem

2•koishiyuji•8m ago•0 comments

What Sysco's $29B Restaurant Depot Acquisition Means for Main Street Menus

https://www.forbes.com/sites/phillempert/2026/03/31/syscos-29-billion-power-grab-what-the-jetro-r...
1•walterbell•8m ago•0 comments

YouTube's AI Plagiarism Problem [video]

https://www.youtube.com/watch?v=Q2Ak8wX0AaQ
1•elcapitan•10m ago•0 comments

Build vs. Buy: AI Has Changed Mathematical Software and In-House Now Makes Sense

https://mathematicsconsultants.com/2026/04/06/build-vs-buy-how-ai-has-changed-the-economics-of-ma...
1•GeniusConsult•10m ago•0 comments

US-Iran war explained by Chinese AI animation: Legend of the Valley of Gold [video]

https://www.youtube.com/watch?v=As0rplNJTZI
2•Eridanus2•14m ago•0 comments

Ask HN: Building a website to post free jobs

1•pbs29•18m ago•0 comments

NASA's Lunar Gateway space station is out. Moon bases are in

https://www.space.com/space-exploration/artemis/nasas-lunar-gateway-space-station-is-out-moon-bas...
1•divbzero•24m ago•0 comments

Cognitive Rust Belt: Hollowing Human Analytic Capacity by Delegating to Machines

https://www.sentinelone.com/blog/the-implementation-blind-spot-why-organizations-are-confusing-te...
1•walterbell•24m ago•0 comments

New Strides Made on Deceptively Simple 'Lonely Runner' Problem

https://www.quantamagazine.org/new-strides-made-on-deceptively-simple-lonely-runner-problem-20260...
2•downboots•26m ago•0 comments

Harnessing Hype to Teach Empirical Thinking with AI

https://arxiv.org/abs/2604.01110
3•azhenley•41m ago•0 comments

A truck driver spent 20 years making a scale model of every building in NYC

https://www.smithsonianmag.com/smart-news/a-truck-drive-spent-20-years-making-this-astonishing-sc...
2•1659447091•41m ago•0 comments

VPN ban 'on the table' as Online Safety Act could be expanded

https://www.express.co.uk/news/uk/2127999/vpn-ban-on-table-online
2•rvnx•46m ago•0 comments

Grokking wavefunction collapse in actual quantum systems

https://www.asiae.co.kr/article/2026032509340425584
1•vi_sextus_vi•54m ago•0 comments

Show HN: We built a camera only robot vacuum for less than 300$ (Well almost)

https://indraneelpatil.github.io/blog/2026/robot-vacuum/
1•indraneelpatil•55m ago•0 comments

Scientists found a protein that drives brain aging – and how to stop it

https://www.sciencedaily.com/releases/2026/04/260405065236.htm
4•mikhael•56m ago•0 comments

Anthropic Removed MagicDocs from Claude Code

https://translunar.io/blog/2026/04/05/magicdocs-removed/
3•translunar•1h ago•1 comments

Show HN: REST API for Gymnasium (fka OpenAI Gym) reinforcement learning library

https://github.com/cloudkj/gymnasium-http-api
1•cloudkj•1h ago•0 comments

Mark Andreessen: "AGI is here"

https://twitter.com/i/status/2040922415551959338
1•SergeAx•1h ago•1 comments

Can your AI rewrite your code in assembly?

https://lemire.me/blog/2026/04/05/can-your-ai-rewrite-your-code-in-assembly/
2•sysoleg•1h ago•0 comments

Wizards of Leroy (and Wrico) Lettering

https://kleinletters.com/Blog/wizards-of-leroy-and-wrico-lettering/
1•rgovostes•1h ago•0 comments

More teens are getting hooked on gambling, often going undetected

https://text.npr.org/nx-s1-5762276
2•1659447091•1h ago•0 comments

NativeRest – Native REST API Client

https://nativesoft.com/
1•KomoD•1h ago•0 comments

RSA WARNING

https://zenodo.org/records/19435034
2•sunbagger•1h ago•0 comments

NSA and IETF, Part 7

https://blog.cr.yp.to/20260405-votes.html
2•Tomte•1h ago•0 comments

The Extinction of the Junior Engineer

https://michaelnovati.substack.com/p/the-extinction-of-the-junior-engineer
1•michaelnovati•1h ago•1 comments

An Inside Look at OpenAI and Anthropic's Finances Ahead of Their IPOs

https://www.wsj.com/tech/ai/openai-anthropic-ipo-finances-04b3cfb9
3•1vuio0pswjnm7•1h ago•1 comments

Realtime monitor of count of animals slaughtered in the US this year

https://animalclock.org/
3•chirau•1h ago•2 comments