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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!

The Hungry Businessman

https://avocadoslaw.substack.com/p/the-hungry-businessman
1•m-aish•43s ago•0 comments

A few ways of specifying per-theme colours in only CSS

https://chrismorgan.info/css-themed-colours
1•chrismorgan•2m ago•0 comments

I spawn random interests and I don't know why

https://ssenthilnathan3.github.io/blog/spawning-random-interests/
1•nathaah3•4m ago•0 comments

The Math of Chip-Firing [pdf]

https://www.dam.brown.edu/people/cklivans/Chip-Firing.pdf
1•soupspaces•5m ago•0 comments

The delicate choreography of the Trump-Xi state dinner

https://www.reuters.com/graphics/CHINA-US/STATE-DINNER/lgpdgbdyovo/
1•giuliomagnifico•7m ago•0 comments

Trump warns Taiwan not to expect blank check from US Military after Xi summit

https://www.foxnews.com/media/trump-warns-taiwan-expect-blank-check-us-military-intense-xi-summit
1•maxloh•7m ago•0 comments

Study: Single dose of psilocybin provided rapid relief from depression

https://news.ki.se/single-dose-of-psilocybin-provided-rapid-relief-from-depression-in-new-study
1•giuliomagnifico•16m ago•0 comments

Agent Behavioral Contracts

https://arxiv.org/abs/2602.22302
1•reiter•16m ago•0 comments

The world is on track to miss its health targets

https://www.technologyreview.com/2026/05/15/1137270/the-world-is-on-track-to-miss-its-health-targ...
1•joozio•16m ago•0 comments

Britain's latest civil servant is a chatbot trained on Gov.uk misery

https://www.theregister.com/public-sector/2026/05/15/britains-latest-civil-servant-is-a-chatbot-t...
1•YeGoblynQueenne•18m ago•0 comments

It's set up, not setup: Scraping GitHub for grammar errors

https://ss32.github.io/set_up_not_setup/
1•disastronaut•19m ago•1 comments

Linkup – Swipe to find cofounders, developers, designers and startup teammates

https://linkup-nine-ruddy.vercel.app/
1•tanakabuilds•24m ago•0 comments

The Iliad Intensive Course Materials

https://www.lesswrong.com/posts/dWQnLi7AoKo3paBXF/the-iliad-intensive-course-materials
1•pykello•24m ago•0 comments

Malicious node-IPC versions published to NPM

https://www.stepsecurity.io/blog/node-ipc-npm-supply-chain-attack
2•rvz•35m ago•0 comments

Distributing the Keys for Private Access to the Web

https://cdt.org/insights/distributing-the-keys-for-private-access-to-the-web/
1•grittygrease•39m ago•0 comments

How an Australian Teen Team Is Making Radio Astronomy Affordable for Schools

https://mag.openrockets.com/p/how-an-australian-teen-team-is-making-radio-astronomy-affordable-fo...
1•openrockets•40m ago•0 comments

How to background play without YouTube Premium on iPhone

1•no_creativity_•43m ago•0 comments

Ascetic Computing

https://ratfactor.com/ascetic-computing
1•shikaan•46m ago•0 comments

Automated AI-Based Pigeon Defense System

https://old.reddit.com/r/SideProject/comments/1s9ywir/automated_pigeon_defense_system/
1•muxamilian•49m ago•1 comments

Nginx Rift

https://depthfirst.com/nginx-rift
1•saikatsg•51m ago•0 comments

Year Anniversary of Warcraft II: Beyond the Dark Portal

https://www.jorsys.org/archive/may_2026.html#newsitem_2026-05-16T10:19:51Z
1•sjoblomj•53m ago•0 comments

Why is it called Kent House?

https://diamondgeezer.blogspot.com/2026/05/kent-house.html
2•susam•59m ago•0 comments

Morley Theorem

https://math.stackexchange.com/questions/5089222/can-this-angle-triplication-construction-be-cons...
1•tzury•1h ago•0 comments

PSVL 1.0 – The most comprehensive source-visible license (276 clauses)

https://github.com/BMBOMICH/PSVL
2•BMBOMICH•1h ago•0 comments

Prime visualisations – or what is the 67 meme

https://github.com/rayking99/primestuff
3•jasepickup•1h ago•1 comments

Setting up an AI-native organization

https://aweb.ai/blog/ai-first-company-howto
3•juanre•1h ago•10 comments

Anker PowerConf C200: a case study in webcam security theatre

https://bearbin.net/blog/2026/c200-webcam-security-theatre
2•bearbin•1h ago•0 comments

A Single Neuron Is Sufficient to Bypass Safety Alignment in LLMs

https://arxiv.org/abs/2605.08513
3•stared•1h ago•0 comments

Java Virtual Machine for Dotnet

https://ikvm.org/
3•wolfi1•1h ago•0 comments

Show HN: Offline voice to text and AI keyboard

https://apps.apple.com/us/app/dictawiz-voice-notes-recorder/id6759256382
3•kcordoc•1h ago•0 comments