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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 Next Attention Economy Has No Eyeballs – It Has Permissions

https://ryanmerlin.com/posts/machine-attention-economy
1•ryanmerlin•24s ago•0 comments

The AI Aesthetic Boom Won't Look Like AI

https://monolith3.substack.com/p/the-aesthetic-boom-is-coming-it-wont
1•pal9000i•1m ago•0 comments

Show HN: Vestige – A queryless memory layer for multi agent coding fleets

https://github.com/samvallad33/vestige/tree/benchmark/silent-rotation/benchmarks/silent-rotation
1•entity002•1m ago•0 comments

Show HN: Season DFS – Run a Season-Long DFS Fantasy Football League

https://app.seasondfs.com/
1•pjbrown11•2m ago•0 comments

Domain registration information should be transparent

https://rushter.com/blog/domain-whois-information/
1•speckx•2m ago•0 comments

Cloak: Protect Your Art from AI

https://cloakapp.net
1•Timotheos•2m ago•1 comments

SMIC's 7nm N+3 node beats Intel 18A metal pitch without EUV

https://www.tomshardware.com/tech-industry/semiconductors/smics-third-gen-7nm-node-shows-smaller-...
1•sbulaev•3m ago•0 comments

Show HN: Selenium Boot- a Spring Boot-Style Framework for Selenium Tests in Java

https://github.com/seleniumboot/selenium-boot
1•mdsddmhossain•3m ago•0 comments

Show HN: Genesys – causal-graph memory for AI agents, open source

https://github.com/Astrix-Labs/genesys
1•rmm2496•3m ago•0 comments

Show HN: Point-in-time datasets of prediction-market event probabilities

https://www.beliefsystems.xyz/data
1•jrstewart•4m ago•0 comments

Show HN: The First Open Source Diffusion ASR Audio Model 15x Faster Than Whisper

https://arxiv.org/abs/2607.13013
1•khurdula•6m ago•0 comments

Show HN: OpenAI-Compatible Cloudflare AI Endpoint Generator

https://open.notebooker.ai
1•mistakevin•6m ago•0 comments

Linux BPF Superpowers (2016)

https://www.brendangregg.com/blog/2016-03-05/linux-bpf-superpowers.html
1•akktor•6m ago•0 comments

Prediction Markets Are Minting a New Type of Insider Trader

https://www.bloomberg.com/graphics/2026-polymarket-traders-who-knew-the-future/
1•wslh•7m ago•0 comments

Show HN: Neverclick – Keyboard-driven mouse control using local computer vision

https://www.neverclick.com/
1•lazov•8m ago•0 comments

Show HN: MonteSheet – 100k Monte Carlo runs in ~1.9s in Google Sheets

https://montesheet.com
1•hackiku•8m ago•0 comments

Free browser-based tools – no account, no server uploads, all local

https://ailearninggym.com
1•nrkoka1•9m ago•0 comments

Prediction markets: You're always betting against the house

https://muddy.jprs.me/posts/2026-07-19-prediction-markets-you-re-always-betting-against-the-house/
1•akktor•9m ago•0 comments

Mooers's Law (2007)

https://en.wikipedia.org/wiki/Mooers%27s_law
1•surprisetalk•9m ago•0 comments

Request for research on basic income by Sam Altman (2016)

https://www.ycombinator.com/blog/basic-income
1•Gecko4072•9m ago•0 comments

Using a SSH bastion, but only when I'm touching grass

https://evertpot.com/ssh-tunnel-if-unresolvable/
1•speckx•11m ago•0 comments

Ears Pro – professional headphone test fixture

https://www.minidsp.com/products/acoustic-measurement/ears-pro
1•gregsadetsky•12m ago•0 comments

AOL's Instant Messenger Was the Unsung Hero of the Early-Aughts

https://schwarztech.net/snippets/aols-instant-messenger-was-the-unsung-hero-of-the-early-aughts
2•speckx•12m ago•0 comments

Gemini 3.6 Flash

https://console.cloud.google.com/agent-platform/publishers/google/model-garden/gemini-3.6-flash
7•marrf•13m ago•2 comments

Show HN: Weight Scope, watch and modify training of Deep Nets in real-time [video]

https://www.youtube.com/watch?v=7a90eZD68e0
1•ipunchghosts•14m ago•0 comments

Ask HN: How do you input to LLMs? Typing, voice, or something else?

2•wompapumpum•16m ago•0 comments

Zef Programming Language

https://zef-lang.dev/
3•MrBuddyCasino•17m ago•1 comments

Protect Your Privacy with California's Drop Tool

https://www.eff.org/deeplinks/2026/07/what-you-need-know-about-californias-drop-tool
1•hn_acker•17m ago•0 comments

Volkswagen blocks custom ROM users from VW app

https://www.heise.de/en/news/Volkswagen-blocks-custom-ROM-users-from-VW-app-11370557.html
2•thunderbong•19m ago•1 comments

Claude Is Not a Compiler

https://blog.exe.dev/claude-is-not-a-compiler
9•bryanmikaelian•20m ago•1 comments