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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!

The Agent Said It Was Done. The Database Disagreed

https://huggingface.co/blog/microsoft/thinkingbox
1•sbulaev•1m ago•0 comments

VGHF Digital Archive passes 5000 magazines. Here's what's next

https://gamehistory.org/5k-magazines/
1•rdmuser•1m ago•0 comments

This fancy computer runs Wall Street [video]

https://www.youtube.com/watch?v=KP6g_3iZDro
1•helloplanets•8m ago•0 comments

Authoritarian Tendencies of Android Developer Verification Program – Eval.blog

https://eval.blog/blog/authoritarian-tendencies-of-android-developer-verification-program/
1•0xcrypto•11m ago•0 comments

'This can't go on': thousands protest against housing crisis in Spain

https://www.theguardian.com/world/2026/oct/03/spain-housing-protest
2•akbarnama•12m ago•0 comments

BBC Domesday Project 40

https://www.theregister.com/offbeat/2026/10/04/spies-prime-ministers-and-balls-the-bbc-domesday-p...
1•defrost•13m ago•0 comments

Does gravity create reality? A shocking path to a theory of everything

https://www.newscientist.com/article/2526507-does-gravity-create-reality-a-shocking-path-to-a-the...
1•the-mitr•14m ago•0 comments

Improper redaction reveals Lincoln's Google Data Center water, electricity usage

https://www.1011now.com/2026/09/30/more-questions-than-answers-about-lincolns-google-data-center-...
1•theanonymousone•22m ago•0 comments

AI, Desire, and Fictional Characters

https://endsdontjustifythemeans.com/p/on-ai-desire-and-fictional-characters
1•BerislavLopac•23m ago•0 comments

AI as Normal Technology (2025)

https://knightcolumbia.org/content/ai-as-normal-technology
1•BerislavLopac•23m ago•0 comments

U.S.-Russia Talks on Ukraine Now Involve an Oil Deal Tied to Trump Allies

https://www.nytimes.com/2026/10/03/us/politics/kushner-witkoff-russia-oil-deal.html
4•JumpCrisscross•24m ago•0 comments

RCTF – a platform for hosting cybersecurity CTF competitions

https://github.com/otter-sec/rctf
1•therepanic•24m ago•0 comments

Hours in the City of the Future with No Smartphone

https://www.bloomberg.com/news/features/2026-10-01/what-it-s-like-to-travel-without-a-smartphone-...
1•leonry•25m ago•1 comments

Aura – a self-hosted AI agent with temporal graph memory, written in Go

https://github.com/chetto1983/Aura
1•chettto983•26m ago•0 comments

Two-stack sliding-window aggregation

https://orlp.net/blog/two-stack-sliding-window-aggregation/
1•fanf2•26m ago•0 comments

How to scale intent, quality, and artistry with AI [video]

https://www.youtube.com/watch?v=GLvFTMtw4Jk
2•simonjgreen•26m ago•1 comments

Impact of AI Search Summaries on Website Traffic

https://arxiv.org/abs/2602.18455
3•geox•27m ago•1 comments

Agentic Video Understanding with Gemini

https://aistudio.google.com/learn/agentic-video-understanding-with-gemini
1•jskherman•28m ago•0 comments

Hairline Isometry

https://hairline.lucasmarkes.com
2•handfuloflight•28m ago•0 comments

In Ukraine, distributed renewables foil Russia's assaults

https://energytransition.org/2026/09/in-ukraine-distributed-renewables-foil-russias-assaults/
14•JumpCrisscross•28m ago•1 comments

How does the AI and Agent Gateway market will shape up going forward

1•sameerdeshmukh•29m ago•0 comments

Browser extension that warns before signing up with a scam-listed site

https://dontkyc.me/browser-addon?lang=en
3•thorarganaut•40m ago•0 comments

Show HN: Point your phone at a workout program and it builds the plan

https://liftspan.fit/
1•liftspan•47m ago•0 comments

America wants to wean itself off Chinese technology

https://www.cnn.com/2026/10/02/business/us-china-tech-bans-intl-hnk-dst
2•01-_-•50m ago•0 comments

Muse Creates Detailed Profiles of All Your Friends and Family

https://www.wired.com/story/muse-creates-detailed-profiles-of-all-your-friends-and-family/
3•01-_-•51m ago•0 comments

Chandraprakash Kumawat – Digital Marketer in Jaipur

https://www.instagram.com/mr_chandrapraksh/
1•mr_chandrapraka•55m ago•0 comments

China's Push into A.I. Has Led to a Problem: Too Much Usage

https://www.nytimes.com/2026/10/02/world/asia/china-ai-overuse.html
1•TMWNN•56m ago•0 comments

AI Learning to Play Chess

https://ailearningchess.ai-learning-chess.workers.dev/
1•porridgeraisin•59m ago•1 comments

IBM Debuts Brain-Inspired Chip for Speedy, Efficient AI (2023)

https://spectrum.ieee.org/neuromorphic-computing-ibm-northpole
1•lioeters•1h ago•0 comments

Show HN: Northstar Web Browser 1.0.28

3•roschdal•1h ago•0 comments