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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!

Governor – a Claude Code plugin to reduce token/context waste

https://github.com/0xhimanshu/governor
2•mantiscore•4m ago•0 comments

I built the Playwright for desktop apps. 80% token savings

https://github.com/lahfir/agent-desktop
2•lahfir•5m ago•0 comments

Flexible OLED NUSA Infiltrator Jacket (Cyberpunk 2077 Cosplay) [video]

https://www.youtube.com/shorts/0cv3ZvFkxwU
1•starkparker•6m ago•0 comments

Welcome to Actual Computer

https://actual.inc/company/blog/introducing-actual-computer
2•ray__•28m ago•0 comments

Hermit – uniform tooling for Linux and Mac

https://github.com/cashapp/hermit
2•zikani_03•35m ago•1 comments

Oak trees outwit their predators

https://phys.org/news/2026-04-oak-trees-outwit-predators.html
1•wglb•36m ago•1 comments

Wine 11.8 Improves VBScript Compatibility Fixes Microsoft Golf 1999

https://www.phoronix.com/news/Wine-11.8-Released
1•Bender•36m ago•0 comments

Job Postings for Software Engineers Are Rapidly Rising

https://www.citadelsecurities.com/news-and-insights/2026-global-intelligence-crisis/
1•delichon•37m ago•0 comments

Why Footbinding Persisted in China for a Millennium (2015)

https://www.smithsonianmag.com/history/why-footbinding-persisted-china-millennium-180953971/
1•thomassmith65•44m ago•0 comments

Robot fighting league has new home in S.F. you can watch – and buy – 'humanoids'

https://www.sfchronicle.com/tech/article/buy-fighting-robots-sf-22231111.php
1•iancmceachern•44m ago•0 comments

OpenX32: Open Linux kernel for Behringer X32 mixer

https://github.com/OpenMixerProject/OpenX32
3•brudgers•46m ago•0 comments

We Built an Authorization Engine That the Fortune 100 Bet On

https://www.technology.org/2026/04/30/we-built-an-authorization-engine-that-the-fortune-100-bet-o...
2•mooreds•52m ago•0 comments

Trump issues executive order against Cuba

https://www.cbsnews.com/miami/news/trump-executive-order-tightening-u-s-sanctions-on-cuba/
2•mark336•56m ago•1 comments

Echon – A privacy-first Discord alternative built in Tauri/Rust

https://echon-voice.com
1•highest678•1h ago•1 comments

Apple Is Holding My Pictures Hostage Until I Accept Their New Terms of Service

https://probablydance.com/2026/05/01/apple-is-holding-my-pictures-hostage-until-i-accept-their-ne...
4•akkartik•1h ago•0 comments

Gut bacteria may play a role in the rise in colon cancer in young adults

https://www.npr.org/sections/shots-health-news/2025/04/25/g-s1-62623/colon-cancer-gut-health-micr...
2•littlexsparkee•1h ago•0 comments

There's a lot of hype about Chinese EVs, is any of it true?

https://arstechnica.com/cars/2026/05/theres-a-lot-of-hype-about-chinese-evs-is-any-of-it-true/
2•Bender•1h ago•0 comments

Show HN: Transparent Tor Proxy – Route all Linux system traffic through Tor

https://github.com/onyks-os/TransparentTorProxy
1•onyks•1h ago•0 comments

xAI Has Used OpenAI's Models to Train Its Own

https://www.wired.com/story/elon-musk-distill-openai-models-partly-xai/
1•bhouston•1h ago•0 comments

Show HN: MemHub, Turn Your GPT/Claude/Gemini History into LLM-Wiki Mindmap

https://github.com/XTraceAI/memhub-llm-wiki-guide
3•TristanX•1h ago•0 comments

Hobson vs. Hansen and the Decline of D.C. Schools

https://www.educationprogress.org/p/hobson-v-hansen-and-the-decline-of
2•barry-cotter•1h ago•1 comments

Finny – AI trading agent that runs in your terminal

https://www.finnyai.tech/
1•jaimin67•1h ago•0 comments

Kubernetes Secret Extraction via ArgoCD ServerSideDiff

https://github.com/argoproj/argo-cd/security/advisories/GHSA-3v3m-wc6v-x4x3
1•milkglass•1h ago•0 comments

TanStack Router: modern router designed for type safety, data‑driven navigation

https://github.com/TanStack/router
1•doener•1h ago•0 comments

Show HN: Hackamaps – A global hackathon map I build after hitting Lovable Limits

1•ostenjap•1h ago•0 comments

So, About That AI Bubble

https://www.theatlantic.com/economy/2026/05/ai-bubble-revenue-anthropic/687022/
2•JumpCrisscross•1h ago•1 comments

Vite: Next Generation Front End Tooling

https://github.com/vitejs/vite
1•doener•1h ago•0 comments

Agsist – free real-time grain market dashboard for US producers

https://agsist.com/
1•dnilgis•1h ago•0 comments

The Half of CI We Forgot to Automate

https://blog.sebastiansastre.co/posts/the-half-of-ci-we-forgot-to-automate/
1•sebastianconcpt•1h ago•2 comments

GitHub Enshittification

https://pablotron.org/2026/04/30/github-enshittification/
2•birdculture•2h ago•0 comments