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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!

Founder Profiles

https://www.founderprofiles.ai/
1•simonpure•3m ago•0 comments

I spent three weeks trying to bridge Reticulum onto HF [video]

https://www.youtube.com/watch?v=5vbl5FL-nsI
1•Bluestein•4m ago•0 comments

The best in the world is not a global competition

https://herbertlui.net/the-best-in-the-world-is-not-a-global-competition/
1•herbertl•9m ago•0 comments

In 23 of 24 categories, AI answer engines recommend one brand in every query

https://noniner.io/report/state-of-ai-brand-visibility-2026
1•fredxhansson•14m ago•0 comments

Show HN:MockForge – Lightweight, zero-dependency Python API and Webhook

https://github.com/alessio1999xx-debug/pyforge-task-Mockforge
2•AlessioDev•15m ago•0 comments

RepRapMicron

https://github.com/VikOlliver/RepRapMicron/wiki
4•RobotToaster•16m ago•0 comments

Faster, Better, Stronger is not a Strategy

https://serce.me/posts/2026-10-16-faster-better-stronger-is-not-a-strategy
2•SerCe•17m ago•0 comments

Hover.com Is a Masterclass in Dark Patterns

https://www.davidsobsessions.com/p/hover-dark-patterns/
3•newswangerd•17m ago•1 comments

Patterns Were Made for Humans

https://cadienvan.github.io/blog/en/patterns-were-made-for-humans/
2•dotneter•18m ago•0 comments

Gen Z Is the First Generation Dumber Than Their Parents

https://www.vice.com/en/article/gen-z-is-the-first-generation-dumber-than-their-parents-neuroscie...
15•Alifatisk•19m ago•7 comments

Grace17 – a new proof assistant for mathematics based on set theory

https://grace17.org/
2•specialgoodness•20m ago•0 comments

WellDoneSuite – one console for orders, stock, customers and content

https://welldonesuite.com/
2•jkshenawy22•23m ago•0 comments

The Electronic Disturbance Theater and Electronic Civil Disobedience

https://www.thing.net/~rdom/ecd/EDTECD.html
2•jruohonen•23m ago•0 comments

Starlink Gateway Station Serving Ukraine Targeted in Arson Attempt in Lithuania

https://militarnyi.com/en/news/starlink-gateway-station-serving-ukraine-targeted-in-arson-attempt...
4•defly•23m ago•0 comments

Distributed Multisensor ISAC

https://www.nature.com/articles/s44459-026-00041-2
2•hasley•28m ago•0 comments

Pyrefly v1.4.0

https://github.com/facebook/pyrefly/releases/tag/1.4.0
2•ocamoss•31m ago•0 comments

User-Agent Reduction: Why Chrome Froze Your Version Number

https://browserinsight.net/blog/user-agent-reduction-explained
1•edward•31m ago•0 comments

Automattic Wants .wordpress. It Doesn't Own WordPress

https://medium.com/@kelliepeterson/automattic-wants-wordpress-it-doesnt-own-wordpress-d9e6be3f3a45
3•ValentineC•37m ago•0 comments

Securities Class Action Filed Against Duolingo, Inc

https://www.businesswire.com/news/home/20261008399415/en/Securities-Class-Action-Filed-Against-Du...
2•theanonymousone•38m ago•0 comments

'Conscious' Director on Exploring the Brain via Lens of Dementia

https://www.hollywoodreporter.com/movies/movie-news/conscious-documentary-film-interview-brain-de...
1•andsoitis•38m ago•0 comments

Dream of birds: the lost songs of Argentina – Ornithology Documentary

https://www.youtube.com/watch?v=PfVrMwS5XFQ
2•todoesverso•41m ago•1 comments

What's on That Access Port?

https://danielmangum.com/posts/whats-on-that-access-port/
1•hasheddan•41m ago•0 comments

Show HN: Spomory – graph-based MCP memory with an RL-trained forgetting policy

https://spomory.yliuai.com/
1•liuyunfei2026•42m ago•0 comments

Vobdoom – Doom on a DVD Player

https://blazelight.dev/blog/vobdoom
1•theblazehen•44m ago•0 comments

LovePlus+ native runtime for Windows, Mac, Linux

https://github.com/gage-marshall/lp-engine
1•gagemarshall•47m ago•1 comments

The EU KIDS Act Should Make Services Safer, Not Create an Internet Badge

https://www.internetsociety.org/blog/2026/10/the-eu-kids-act-should-make-services-safer-not-creat...
2•jruohonen•50m ago•1 comments

Keyboard Hypnosis

https://blog.legires.fr/2026/10/17/keyboard_hypnosis.html
1•hide_on_bush•51m ago•0 comments

What Firecrawl's $75M raise is telling us about the AI stack

https://www.enconvert.com/blog/the-real-story-behind-firecrawl-s-75m-raise
1•theunscriptedk•51m ago•0 comments

Show HN: I kept abandoning task systems, so I built one that picks three a day

https://3anddoneapp.com/try
1•dmayle•52m ago•0 comments

What Is a Hydration Mismatch Error and How Do You Fix It?

https://www.gmoniava.com/blog/hydration-mismatch-errors-and-how-to-fix-them
1•gmoniava•53m ago•0 comments