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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•8mo 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!

Musk seeks up to $134B from OpenAI, Microsoft in fraud lawsuit

https://www.business-standard.com/world-news/musk-seeks-up-to-134-billion-from-openai-microsoft-i...
1•hagbard_c•7m ago•0 comments

I hotreload Rust and so can you

https://kampffrosch94.github.io/posts/hotreloading_rust/
1•polanas•9m ago•0 comments

Do people still need websites, or just a public page?

1•paravaib•12m ago•0 comments

Pushing the smallest possible change to production

https://ankursethi.com/blog/smallest-possible-change/
1•todsacerdoti•15m ago•0 comments

Log Levels: A Better Strategy with OpenTelemetry

https://www.dash0.com/knowledge/log-levels
1•ayoisaiah•16m ago•0 comments

Vercel Launches Skills – "NPM for AI Agents" with React Best Practices Built-In

https://jpcaparas.medium.com/vercel-launches-skills-npm-for-ai-agents-with-react-best-practices-b...
1•zenoware•23m ago•0 comments

The Instant Pot Failed Because It Was a Good Product (2023)

https://www.theatlantic.com/technology/archive/2023/06/instant-pot-bankrupt-private-equity/674414/
1•rwmj•24m ago•1 comments

The 600-year-old origins of the word 'hello'

https://www.bbc.com/culture/article/20260113-hello-hiya-aloha-what-our-greetings-reveal
7•1659447091•26m ago•1 comments

Ask HN: Favorite YouTube Channels?

2•chistev•32m ago•1 comments

Ask HN: Any tools for managing multi Claude Code instances?

1•tansan•34m ago•0 comments

Why Saunas, Bathhouses, Cold Plunge Pools Are So Popular

https://www.bloomberg.com/news/features/2026-01-16/why-saunas-bathhouses-cold-plunge-pools-are-so...
1•Anon84•35m ago•0 comments

Show HN: Termilingo – a terminal-based spaced repetition flashcard app

https://github.com/ayakovlenko/termilingo
1•ayakovlenko•35m ago•0 comments

Case Study: Hydration Latency in Enterprise E-Commerce (Nike vs. New Balance)

https://websiteaiscore.com/blog/nike-vs-new-balance-technical-audit
1•aggeeinn•43m ago•1 comments

Photo was taken in 1911 using glass plate technology

https://bsky.app/profile/alanjstedman.bsky.social/post/3mcm2qdizg22u
4•doener•43m ago•1 comments

Don't be a human alarm clock

https://mannhowie.com/human-alarm-clock
1•elephant_burger•44m ago•1 comments

WhisperPair: Hijacking Bluetooth Accessories Using Google Fast Pair

https://whisperpair.eu/
2•xerosic•46m ago•0 comments

Vercel's Web Interface Guidelines

https://vercel.com/design/guidelines
1•handfuloflight•47m ago•0 comments

I used an agent to hunt vulns

https://blazelight.dev/blog/agent-vuln-hunting.mdx
1•theblazehen•48m ago•0 comments

Fitdrop: Personal exploration of fashion from 1980 to 2025

https://fitdrop.cc/
2•num42•49m ago•0 comments

What predicts success in AI coding? (Analysis of 4.6k amp threads)

https://amp-analysis-casestudy.vercel.app/
1•njpatel•51m ago•0 comments

Incarnation Lease

https://atmankalena.substack.com/p/incarnation-lease
1•Trifectorium•53m ago•1 comments

Why Mixing Colors on Your Computer Makes Mud

https://spectraljs.com/blog/why_mixing_colors_on_your_computer_makes_mud/
2•rvanwijnen•55m ago•0 comments

Architecture for Disposable Systems

https://tuananh.net/2026/01/15/architecture-for-disposable-systems/
6•tuananh•59m ago•2 comments

The modern, full-stack TypeScript framework that makes T3 Stack look like 2022

https://github.com/yazcaleb/c4-template
2•plawlost•1h ago•0 comments

Multi armed bandit resource allocation in Near Memory Processing architectures

https://www.sciencedirect.com/science/article/pii/S277306462500012X
4•rbanffy•1h ago•0 comments

Cold Truths

https://newsletter.doomberg.com/p/cold-truths
1•simonebrunozzi•1h ago•0 comments

ASCII characters are not pixels: a deep dive into ASCII rendering

https://alexharri.com/blog/ascii-rendering
53•alexharri•1h ago•3 comments

Gut micro-organisms associated with health, nutrition and dietary intervention

https://www.nature.com/articles/s41586-025-09854-7?lid=t94o71j7gslg
8•lonelyasacloud•1h ago•1 comments

A collection of my weird, fun, and fast-built side projects

https://www.pankajtanwar.in/side-hustles
2•jaynate•1h ago•0 comments

AV1 Image File Format Specification Gets an Upgrade with AVIF v1.2.0

https://aomedia.org/blog%20posts/AV1-Image-File-Format-Specification-Gets-an-Upgrade-with-AVIF/
8•breve•1h ago•0 comments