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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!

Show HN: Layoutmaster cures DOM reflow with six simple API

https://www.layoutmaster.dev/
1•zhxiaoliang•43s ago•0 comments

Benedict Evans: AI eats the world (Spring 26) [pdf]

https://static1.squarespace.com/static/50363cf324ac8e905e7df861/t/6a0af5d0484fbf5fe9a7743e/177910...
1•topherjaynes•47s ago•0 comments

Polynomials, the Canonical Embedding, and Encoding

https://www.jeremykun.com/2026/04/29/ckks-polynomials-the-canonical-embedding-and-encoding/
1•surprisetalk•5m ago•0 comments

The Inheriting a Mess Episode [audio]

https://www.buzzsprout.com/1351411/episodes/19170637-the-inheriting-a-mess-episode-when-the-build...
1•mooreds•6m ago•0 comments

Open-Source Platform for Magnetics Design and Simulation

https://openmagnetics.com/
1•navigate8310•7m ago•0 comments

Lippmann Colour Photography

https://www.alternativephotography.com/lippmann-colour-photography/
1•gus_massa•8m ago•1 comments

Hershey Bets on Agentic AI to Rethink $2B in Marketing Spend

https://www.adweek.com/brand-marketing/exclusive-hershey-bets-on-ai-agents-to-fix-its-2-billion-m...
1•mooreds•8m ago•0 comments

Top Sanity Agencies to Hire for Your Business Project in 2026

https://gitnation.com/contents/12-top-sanity-cms-development-agencies-to-hire
1•katyadrozd•13m ago•0 comments

A new app store for kids

https://apps.openrockets.com/
1•openrockets•14m ago•0 comments

Show HN: I'm done. Flow editors are broken. And you all know it

https://wanderer-flow.de/blog/im-done-flow-editors-are-broken-and-you-all-know-it/
1•steampixel•14m ago•0 comments

RentPulse-Chrome extension that notifies 60s of new listings

https://www.rentpulse.ie/
1•liquoriceIce•15m ago•0 comments

Atlas TQ1_0 – Pure C++ Ternary (1.58-Bit) Inference Engine for CPU

https://github.com/xxxn3m3s1sxxx/ATLAS-TQ1_0
1•xxxn3m3s1sxxx•15m ago•0 comments

Make Your Coding Agent Opinionated

https://medium.com/@brookejamieson/make-your-coding-agent-opinionated-10ca175801a9
1•mooreds•15m ago•0 comments

The Quality Dividend: Why the Real AI Opportunity Isn't Speed

https://blog.danielvaughan.com/the-quality-dividend-why-the-real-ai-opportunity-isnt-speed-ab6895...
1•dvaughan•16m ago•0 comments

Changes to Gemini model access and limits

https://support.google.com/gemini/answer/17004136?hl=en
2•jonbaer•19m ago•0 comments

Sobriety

https://blairspeed.substack.com/p/sobriety
1•surprisetalk•19m ago•0 comments

A Linux-like kernel in a browser tab – deep dive in the BrowserPod architecture

https://labs.leaningtech.com/blog/browserpod-deep-dive
3•theanonymousone•20m ago•0 comments

Incident: Croatia BCS3 at Split, rejected takeoff due to runway excursion

https://avherald.com/h?article=5394b296&opt=0
1•garyclarke27•22m ago•0 comments

Why the Mandalorians Are Basically Militant Space Amish [video]

https://www.youtube.com/watch?v=gl0kKXFuHD8
1•Imustaskforhelp•23m ago•0 comments

Show HN: I made a macOS app to help me use Japanese websites

https://littlebobert.github.io/sasu.html
1•bobertdowney•23m ago•0 comments

I broke a working PR because an LLM convinced me there was a bug

https://www.droppedasbaby.com/posts/2602-02/
1•offbyone42•25m ago•0 comments

What's True About the Evolution of Men's Greater Average Height?

http://ecodevoevo.blogspot.com/2026/02/whats-true-about-evolution-of-mens.html
1•BigTTYGothGF•26m ago•0 comments

Apple Papercuts

https://taoofmac.com/space/blog/2026/05/18/1320
3•rcarmo•26m ago•1 comments

Linux security mailing list 'almost unmanageable'

https://www.theregister.com/security/2026/05/18/linus-torvalds-says-ai-powered-bug-hunters-have-m...
13•jonbaer•29m ago•2 comments

MAGA allies tell Trump to vet AI before release

https://www.axios.com/2026/05/18/trump-ai-steve-bannon-humans-first-letter
4•thm•31m ago•2 comments

What Lucid Dreaming Reveals About Waking Life

https://medium.com/@genady_awarelife/what-lucid-dreaming-reveals-about-waking-life-48e08c337f21
1•genadym•31m ago•0 comments

Isms.sh – Free and Open Source Information Security Management System

https://github.com/unidoc/isms
1•unidoc•33m ago•0 comments

Learn Harness Engineering

https://walkinglabs.github.io/learn-harness-engineering/en/
2•redbell•33m ago•0 comments

Pope Leo's encyclical on preserving the human person in the AI era drops May 25

https://www.vaticannews.va/en/pope/news/2026-05/pope-leo-xiv-first-encyclical-magnifica-humanitas...
1•dmschulman•33m ago•0 comments

The End of Cheap AI: What Consumption Pricing Means for Organizations

https://articles.zimetic.com/the-end-of-cheap-ai-what-consumption-pricing-means-for-engineering-o...
1•bzimbelman•36m ago•0 comments