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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!

National Security Strategy of the United States of America [pdf]

https://www.whitehouse.gov/wp-content/uploads/2025/12/2025-National-Security-Strategy.pdf
1•keepamovin•27s ago•0 comments

Build your own compressed-sensing 1-pixel camera

https://www.instructables.com/Single-Pixel-Camera-Using-an-LED-Matrix/
1•gsf_emergency_6•2m ago•0 comments

Ahnlich, a fast lightweight similarity search engine

https://ahnlich.dev/
1•ddeven96•2m ago•2 comments

Single-pixel camera at home [video]

https://www.youtube.com/watch?v=EE9AETSoPHw
1•gsf_emergency_6•3m ago•0 comments

Ask HN: Is self-aware AI harmful for our culture?

1•eimrine•5m ago•0 comments

Ask HN: AMA – AI Startups Assessor and Strategy Consultant

1•duverse•14m ago•0 comments

Jujutsu v0.36.0 Released

https://github.com/jj-vcs/jj/releases/tag/v0.36.0
1•birdculture•15m ago•0 comments

AI detection tools cannot prove that text is AI-generated

https://www.seangoedecke.com/ai-detection/
1•Twixes•19m ago•0 comments

Show HN: Know your employees skills gap and boost retention rate

https://semis.reispar.com
1•tolulade_•19m ago•0 comments

The Gamma Language

https://lair.masot.net/gamma/
1•RossBencina•23m ago•0 comments

Giant humanoid electrical pylons

https://choishine.com/Giants.html
1•yzydserd•28m ago•0 comments

Should CSS Be Constraints?

https://pavpanchekha.com/blog/why-css-bad.html
1•tannhaeuser•32m ago•1 comments

Why Does A.I. Write Like That?

https://www.nytimes.com/2025/12/03/magazine/chatbot-writing-style.html
2•carabiner•34m ago•0 comments

Instagram Profit Margin Calculator Online Free Tool

https://metaconvert.blogspot.com/2025/10/instagram-profit-margin-calculator.html
2•MetaConvert•41m ago•0 comments

Unix Original Bell Labs v4 Found at University of Utah

https://www.youtube.com/watch?v=IR-f07LN0-Y
1•rasengan0•43m ago•0 comments

Grok 4.20 beats all other AI models in Alpha Arena test

https://www.sammyfans.com/2025/12/05/grok-4-20-beats-all-other-ai-models-in-alpha-arena-test/
1•terryds•45m ago•0 comments

High-Performance DBMSs with io_uring: When and How to use it

https://arxiv.org/abs/2512.04859
1•mfiguiere•48m ago•0 comments

Loopi – Open-Source Visual Browser Automation Platform

https://loopi.dyan.live/
1•0018akhil•49m ago•1 comments

Nano Banana Pro: reasoning-first 4K studio

https://nanobanapro.com
1•AnyVideoAI•56m ago•0 comments

Which protocol do you guys use in NAS shares to Proxmox – NFS or SMB?

https://old.reddit.com/r/Proxmox/comments/1i50jy9/which_protocol_do_you_guys_use_in_nas_shares_to/
2•sipofwater•57m ago•2 comments

Alternate Reality Christmas Gifts

https://medium.com/luminasticity/alternate-reality-christmas-gifts-9d9dd9c81a2b
1•bryanrasmussen•1h ago•0 comments

Show HN: How to play imposter game with impostergame.win

https://impostergame.win/how-to-play
1•tomstig•1h ago•1 comments

Turning everyday observations into investable signals

https://www.prophit.investments/
2•porterh•1h ago•1 comments

UK IVF couples rank embryos based on potential IQ, height and health

https://www.theguardian.com/society/2025/dec/06/uk-ivf-couples-use-legal-loophole-rank-embryos-iq...
2•sorokod•1h ago•0 comments

Maher Arar

https://en.wikipedia.org/wiki/Maher_Arar
4•KnuthIsGod•1h ago•0 comments

Very Important People

https://dirt.fyi/article/2025/11/very-important-people
1•gmays•1h ago•0 comments

Why Theme Parks Keep Getting More Extreme

https://www.theatlantic.com/culture/archive/2025/09/universal-epic-universe-disney-theme-park-att...
2•vinhnx•1h ago•0 comments

Rnj-1: Building Instruments of Intelligence

https://essential.ai/research/rnj-1
1•aratahikaru5•1h ago•0 comments

Pantone Color of the Year 2026

https://www.pantone.com/uk/en/color-of-the-year/2026
1•vinhnx•1h ago•1 comments

Schizophrenia sufferer mistakes smart fridge ad for psychotic episode

https://old.reddit.com/r/LegalAdviceUK/comments/1pc7999/my_schizophrenic_sister_hospitalised_hers...
62•hliyan•1h ago•21 comments