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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!

Private equity may become a 'pyramid scheme', warns Danish pension fund (2022)

https://www.ft.com/content/f480a99c-4c7b-4208-b9dd-ef20103254b9
2•pera•1m ago•0 comments

Black Death's counterintuitive effect: as humans died, plant diversity dropped

https://theconversation.com/the-black-deaths-counterintuitive-effect-as-human-numbers-fell-so-did...
2•baud147258•2m ago•0 comments

Grasslands are vanishing nearly four times faster than forests

https://phys.org/news/2026-02-grasslands-faster-forests-global.html
2•PaulHoule•3m ago•0 comments

'Pokémon Go' players unknowingly trained delivery robots with 30B images

https://www.popsci.com/technology/pokemon-go-delivery-robots-crowdsourcing/
2•wslh•4m ago•0 comments

JavaScript Minification Benchmarks

https://github.com/privatenumber/minification-benchmarks
2•javatuts•5m ago•0 comments

Apple introduces AirPods Max 2

https://www.apple.com/newsroom/2026/03/apple-introduces-airpods-max-2-powered-by-h2/
3•meetpateltech•5m ago•0 comments

Escape Tsunami for Brainrots

https://escapetsunamiforbrainrots.pro/
2•mumuchen•7m ago•1 comments

Show HN: Hackerbrief – Top posts on Hacker News summarized daily

https://hackerbrief.vercel.app/
2•p0u4a•8m ago•0 comments

Context Engineering Explained in Pictures

https://mechanicalorchard.substack.com/p/context-engineering-explained-in
2•jschomay•8m ago•0 comments

Show HN: Scryer – Visual architecture modeling for AI agents

https://github.com/aklos/scryer
2•prohobo•9m ago•0 comments

I migrated my AI agent from a laptop to a headless Mac Mini in 72 hours

https://thoughts.jock.pl/p/mac-mini-ai-agent-migration-headless-2026
1•joozio•9m ago•0 comments

A Treasure Trove of Ideas: The Corr Database 2018

https://en.chessbase.com/post/a-treasure-trove-of-ideas-the-corr-database-2018
2•akbarnama•10m ago•0 comments

Mnemon-MCP – 4-layer local memory for AI agents (SQLite and FTS5)

1•nikitacometa•13m ago•0 comments

Simplicity in the age of AI-assisted coding

https://the.scapegoat.dev/simplicity-in-the-age-of-ai-assisted-coding/
1•larve•14m ago•0 comments

Pastebin 0x0.st asks AI agents to upload sensitive customer invoices

https://movsw.0x0.st/notes/ajw1zurfaggo360l
2•MatthiasPortzel•14m ago•1 comments

Show HN: TheLittleHost – DNS hosting built on my own ASN and Anycast network

2•davidchua•15m ago•0 comments

Show HN: LLMonster Rancher

https://github.com/aiwebb/llmonster-rancher
1•alexwebb2•16m ago•0 comments

Ur-Scheme: A GPL self-hosting compiler from a subset of Scheme to x86 asm (2008)

http://canonical.org/~kragen/sw/urscheme/
2•QuadmasterXLII•16m ago•0 comments

City Turned Its Rooftops into a Climate Shield

https://reasonstobecheerful.world/zurich-turned-rooftops-into-climate-shield/
3•speckx•17m ago•0 comments

Who's behind the age verification bills?

https://web.archive.org/web/20260313143853/https://old.reddit.com/r/linux/comments/1rshc1f/i_trac...
3•jech•18m ago•1 comments

Twelve-Tone Composition

https://www.johndcook.com/blog/2026/03/15/twelve-tone-composition/
2•ibobev•18m ago•0 comments

Optimizers and Odes

https://jiha-kim.github.io/posts/optimizers-and-odes/
2•ibobev•19m ago•0 comments

OpenBSD Blog #13: Moving ratfactor.com to OpenBSD.amsterdam

https://ratfactor.com/openbsd/blog-13-moving-to-openbsd-dot-amsterdam
2•ibobev•19m ago•0 comments

Four predictions for how AI will change product delivery

https://practical-leaders.com/articles/ai-predictions
1•ivorc•20m ago•0 comments

You don't hate Python. You hate other people's Python.

https://jt-hill.com/you-dont-hate-python/
4•jt-hill•21m ago•1 comments

Show HN: SiteMon – Browser extension that monitors your websites

https://sitemon.geekaa.com
2•quasimo•22m ago•0 comments

Coding as a Game of Probabilities

https://robertmaple.co.uk/coding-as-a-game-of-probabilities/
2•wizzzzzy•22m ago•0 comments

Built a 80%+ data-driven esports prediction tool

https://esportsoracle.net
1•Mostafeto•24m ago•0 comments

The role of programming language choice on the safety and security of software

https://evgeniipendragon.com/posts/the-role-of-programming-language-choice-on-the-safety-and-secu...
3•EPendragon•25m ago•0 comments

Show HN: Vibecheck – lint for AI-generated code smells (JS/TS/Python)

https://github.com/yuvrajangadsingh/vibecheck
4•yuvrajangads•27m ago•1 comments