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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•6mo 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!

Shown HN: I Built an AI Terminator to Declare War on Email Marketing Spam

https://sub.zacbowling.com/p/i-built-an-ai-terminator-to-declare
1•zbowling•2m ago•0 comments

CoreWeave Reveals the Significant Fragility of the 'AI Trade' for Broader Market

https://seekingalpha.com/article/4849234-coreweave-reveals-the-significant-fragility-of-the-ai-tr...
1•zerosizedweasle•2m ago•0 comments

Show HN: NannyCam – A Baby Monitor App That Works Online or Offline

https://play.google.com/store/apps/details?id=com.babycam.videomonitor.babymonitor.nannycam&hl=en_US
1•idish•2m ago•0 comments

Show HN: Syncthing4swarm, Automatically Deploy Syncthing Across Docker Swarm

https://github.com/sammonsempes/syncthing4swarm
1•syncthing4swarm•2m ago•0 comments

Server Survival: 3D simulation game where you play as a Cloud Architect

https://github.com/pshenok/server-survival
1•freetonik•4m ago•0 comments

Apple will not let me join the Developer Program – and will not say why

https://blog.kulman.sk/apple-developer-program/
4•ingve•8m ago•0 comments

Zig quits GitHub, says Microsoft's AI obsession has ruined the service

https://www.theregister.com/2025/12/02/zig_quits_github_microsoft_ai_obsession/
5•Brajeshwar•8m ago•0 comments

Indian government reveals GPS spoofing at eight major airports

https://www.theregister.com/2025/12/03/india_gps_spoofing/
2•Brajeshwar•9m ago•0 comments

San Francisco sues food giants over ultra-processed products

https://www.theguardian.com/society/2025/dec/02/ultra-processed-foods-lawsuit-san-francisco
2•vinni2•10m ago•1 comments

General Parser Combinators in Racket (2012)

https://epsil.github.io/gll/
1•swatson741•11m ago•0 comments

EngineAI T800: Born to Disrupt

https://twitter.com/engineairobot/status/1995801607481819518
1•kfarr•11m ago•0 comments

Show HN: I stumbled on a free AI photo enhancer – surprisingly good results

https://aienhancer.ai/
3•passioner•12m ago•0 comments

Accepting US car standards would risk European lives

https://etsc.eu/accepting-us-car-standards-would-risk-european-lives-warn-cities-and-civil-society/
5•saubeidl•19m ago•0 comments

Zhuque-3 reaches orbit on test flight, first stage lost during landing attempt

https://spacenews.com/zhuque-3-reaches-orbit-on-test-flight-first-stage-lost-during-landing-attempt/
3•perihelions•22m ago•0 comments

Show HN: I built a privacy-first UK tax calculator

https://salarysacrificecalculator.org
2•tancky777•29m ago•0 comments

Claude Code on Desktop

https://code.claude.com/docs/en/desktop
1•ecares•30m ago•0 comments

AI receptionist, look for GTM cofounder

https://callpal.com
1•franklin_yao•35m ago•1 comments

Show HN: An AI environment to understand sources or topics

https://www.kerns.ai/
1•kanodiaayush•36m ago•0 comments

Monument Valley Blog

https://monumentvalley.blog/
1•Nancy1230•36m ago•0 comments

Google OCS Apollo: The >$3B Game-Changer in Datacenter Networking (2023)

https://newsletter.semianalysis.com/p/google-apollo-the-3-billion-game
1•smj-edison•39m ago•0 comments

Collagen amino acid composition supplementation reduces biological age in humans

https://www.nature.com/articles/s41514-025-00280-7
2•walterbell•40m ago•0 comments

ChatGPT's Biggest Foe: Poetry

https://nautil.us/chatgpts-biggest-foe-poetry-1252100/
5•billybuckwheat•42m ago•0 comments

Search for Malaysia Airlines flight MH370 to resume

https://www.theguardian.com/world/2025/dec/03/search-for-malaysia-airline-flight-mh370-to-resume-...
4•n1b0m•44m ago•0 comments

China's first orbital booster landing attempt

https://visitor.passport.weibo.cn/visitor/visitor?entry=sinawap&a=enter&url=https%3A%2F%2Fm.weibo...
4•nkoren•46m ago•1 comments

Apple Aperture: Senior QA (2004-2005)

https://substack.techreflect.org/p/aperture-senior-qa-2004-2005
2•Austin_Conlon•46m ago•0 comments

AI's Missing UI

https://www.fujimon.com/blog/missing-ui
3•yuyafujimoto•50m ago•1 comments

RFC-8927: JSON Type Definition

https://datatracker.ietf.org/doc/html/rfc8927
1•rapnie•53m ago•0 comments

Why are Transformers replacing CNNs? [video]

https://www.youtube.com/watch?v=KnCRTP11p5U
1•chii•53m ago•0 comments

GitHub Trending Page Stuck for a Month

https://github.com/orgs/community/discussions/179946
4•keksis_leo•1h ago•0 comments

Ask HN: Vibe Coded Apps in Production

1•rajeshrajappan•1h ago•2 comments