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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!

Dead Metaphor

https://en.wikipedia.org/wiki/Dead_metaphor
1•cainxinth•2m ago•0 comments

Show HN: Microcodegen.py – PRD → FastAPI app, one file, no LLM calls

https://github.com/Anioko/microcodegen
1•anioko1•4m ago•0 comments

Horstine the Whale: An Obituary

https://www.eugyppius.com/p/horstine-the-whale-an-obituary
1•wrqvrwvq•6m ago•0 comments

Measuring LLMs' ability to develop exploits

https://red.anthropic.com/2026/exploit-evals/
1•Kneenex•6m ago•0 comments

Green Card Seekers Must Leave U.S. to Apply, Trump Administration Says

https://www.nytimes.com/2026/05/22/us/politics/green-card-changes-trump.html
4•tlhunter•7m ago•0 comments

My Profile HTTP://Profile.jomvia.com

1•MeherunJessi•8m ago•0 comments

Regular rebuilding of the Ise Shrine due to Shinto principle

https://en.wikipedia.org/wiki/Ise_Shrine
1•b-kf•10m ago•1 comments

Aimeflux – Local-first macOS dictation with searchable transcript history

https://aimeflux.com
1•erdiegoant•12m ago•0 comments

Judge dismisses human smuggling charges against Kilmar Abrego Garcia

https://apnews.com/article/kilmar-abrego-garcia-el-salvador-deportation-smuggling-035a2b2ded3ede6...
2•petethomas•14m ago•0 comments

Use Grok in OpenCode

https://x.ai/news/grok-opencode
2•porridgeraisin•15m ago•0 comments

ABM-101

https://therestlesstechnophile.com/2019/11/08/abm-101/
2•picture•18m ago•0 comments

Viktor Zhdanov

https://worksinprogress.co/issue/the-story-of-viktor-zhdanov/
2•niklasbuschmann•18m ago•0 comments

Netherlands seizes 800 servers of hosting firm enabling cyberattacks

https://www.bleepingcomputer.com/news/security/netherlands-seizes-800-servers-of-hosting-firm-ena...
4•jethronethro•18m ago•0 comments

Show HN: ReTab – a Cmd+Tab-style switcher for Safari tabs

https://apps.apple.com/us/app/retab-tab-switch-for-safari/id6736950080
2•hyouuu•20m ago•0 comments

Notes from the Foothills of the Singularity

https://every.to/playtesting/notes-from-the-foothills-of-the-singularity
2•mooreds•21m ago•0 comments

Universal Paperclips (2017)

https://www.decisionproblem.com/paperclips/index2.html
2•caminanteblanco•27m ago•0 comments

The GitHub Breach Through VS Code Is the One I Warned About

https://mazinahmed.net/blog/github-vscode-breach/
3•mazen160•29m ago•0 comments

Show HN: I built a Product Hunt alternative that gets views

https://www.scrolllaunch.com
2•kalashvasaniya•30m ago•0 comments

I Had to Build a Cryptographic Audit Trail Just to Prove I Wrote My Own Code

https://github.com/jaysyrk/teleos
3•jaysyrk•32m ago•1 comments

Half Life 2 on the Original Xbox is an incredible port. Here is why [video]

https://www.youtube.com/watch?v=c66hfqw4SKc
3•RyanShook•34m ago•0 comments

Show HN: Mneme – Open-protocol AI memory that lives on your device

https://github.com/ppserapiao/mneme
2•ptengelmann•34m ago•0 comments

The Pkg.go.dev API

https://go.dev/blog/pkgsite-api
2•0xedb•36m ago•0 comments

NTSB pulls docket after AI recreates dead pilots' voices

https://arstechnica.com/ai/2026/05/ai-users-re-create-dead-pilots-voices-from-crash-investigation...
14•Lihh27•41m ago•4 comments

OpenAI intentionally removed Codex's visible context usage indicator

https://github.com/openai/codex/issues/23794
2•gobdovan•43m ago•1 comments

The Surprising Divide over What Counts as True

https://reason.com/2026/05/15/the-surprising-divide-over-what-counts-as-true/
2•rendx•44m ago•2 comments

DeepSeek-V4-Pro 75% off discount is now permanent

https://twitter.com/deepseek_ai/status/2057854261699195173
1•yogthos•45m ago•0 comments

JuliaMono – a monospaced font for scientific and technical computing

https://juliamono.netlify.app/
1•michaelsbradley•46m ago•0 comments

Is this what driving an F1 car feels like?

https://cameronwestland.com/is-this-what-driving-an-f1-car-feels-like/
1•camwest•46m ago•0 comments

Beautiful Monero Block Explorer, mempool.space copycat

https://monerospace.org
1•Cider9986•53m ago•0 comments

Hengefinder: Finding When the Sun Aligns with Your Street

https://victoriaritvo.com/blog/hengefinder/
2•evakhoury•54m ago•0 comments