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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•11mo 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!

Creativity with AI vs. IRL (video production)

https://www.geekbeard.dev/p/ai-creativity-effort
1•drunx•1m ago•0 comments

FBI's "Suicide Letter" to Dr. Martin Luther King, Jr (2014)

https://www.eff.org/deeplinks/2014/11/fbis-suicide-letter-dr-martin-luther-king-jr-and-dangers-un...
1•chistev•1m ago•1 comments

Coconut Ventures: A game where you start your own VC Fund in Bengaluru

https://www.coconutventures.in/
1•Anunayj•1m ago•1 comments

AI Agent Traps (DeepMind)

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6372438
1•armcat•2m ago•0 comments

C++: Growing in a world of competition, safety, and AI (herb-sutter) [pdf]

https://becpp.org/Symposium2026/material/BeCPP%20-%202026-03-30%20-%20Herb%20Sutter%20-%20C++%20G...
1•signa11•2m ago•0 comments

M 7.4 – 100 km ENE of Miyako, Japan

https://earthquake.usgs.gov/earthquakes/eventpage/us6000sri7/executive
1•spacejunkjim•3m ago•0 comments

Next.js developer Vercel warns of customer credential compromise

https://www.theregister.com/2026/04/20/vercel_context_ai_security_incident/
1•omer_k•4m ago•0 comments

Dethroned by AI

https://jigarkdoshi.bearblog.dev/dethroned/
1•j_juggernaut•6m ago•0 comments

The Process Is the Art

https://animationobsessive.substack.com/p/the-process-is-the-art
1•vinhnx•12m ago•0 comments

Operator-Use

https://github.com/CursorTouch/Operator-Use
1•jeomon•19m ago•1 comments

I revived Encarta's Mindmaze and added a new game teaching how to build chips

https://laurentiu-raducu.medium.com/i-added-games-to-select-supply-and-heres-why-bc6db06f8bd4
1•laurentiurad•19m ago•1 comments

How to hire people who are better than you

https://longform.asmartbear.com/hire-better-than-you/
1•doppp•19m ago•0 comments

Tracking when Trump chickens out

https://www.thetacotracker.com/
4•JMiao•25m ago•0 comments

Trusteando Protocol for a new semantic web

https://github.com/confidencenode/Trusteando_Protocol
1•Trusteando•28m ago•0 comments

Jammermfg1

https://www.jammermfg.com/fr/
1•gitana•30m ago•0 comments

AI Tutor

http://66.179.255.201/aitutor
1•mraza_uw•30m ago•0 comments

Farm Bankruptcies Continued to Climb in 2025

https://www.fb.org/market-intel/farm-bankruptcies-continued-to-climb-in-2025
2•luu•31m ago•0 comments

Deleteduser.com a $15 PII Magnet

https://mike-sheward.medium.com/deleteduser-com-a-15-pii-magnet-c4396eb21061
3•edent•34m ago•0 comments

OpenClaw isn't fooling me. I remember MS-DOS

https://www.flyingpenguin.com/build-an-openclaw-free-secure-always-on-local-ai-agent/
3•feigewalnuss•36m ago•0 comments

The Monday Elephant #1: pgweb

https://pgdash.io/blog/monday-elephant-postgres-tips-1.html?h
1•i_have_to_speak•37m ago•0 comments

What Claude Code Chooses

https://amplifying.ai/research/claude-code-picks/report
1•lionkor•38m ago•0 comments

Voicebox – The open-source voice synthesis studio

https://github.com/jamiepine/voicebox
1•sebakubisz•41m ago•0 comments

Agentic Development Workflow in Emacs

https://20y.hu/~slink/journal/agent-shell/index.html
1•b6dybuyv•42m ago•0 comments

HN: Vynly Social network for AI agents, with MCP server and demo token

https://vynly.co/agents
1•nftdude2024•44m ago•0 comments

AI Agents replacing mid-management, not developers

https://dontdos.substack.com/p/what-if-the-robots-came-for-the-org
3•sirnicolaz•45m ago•1 comments

Snake Bros Keep Getting Bitten by Their Lethal Pets. Only Zoos Can Save Them

https://www.wired.com/snake-bros-antivenom-index-zoos-influencers-chris-gifford/
1•robtherobber•46m ago•0 comments

We taught AI to write correct streaming SQL

https://github.com/risingwavelabs/agent-skills
1•WavyPeng•47m ago•0 comments

French Mobile Network Datasets

https://tech.marksblogg.com/france-open-mobile-network-data.html
2•marklit•48m ago•0 comments

The 800 page book that made me a web dev

1•wuhhh•49m ago•0 comments

Everything you ever wanted to know about terminals (but were afraid to ask)

https://xn--rpa.cc/irl/term.html
2•Antibabelic•54m ago•0 comments