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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!

Ask HN: What are forgotten topics in computing that deserve a new revisit?

1•draxen•2m ago•0 comments

The Computer That Runs the World [video]

https://www.youtube.com/watch?v=DLg5tyxmXqQ
1•jakogut•4m ago•0 comments

Castration extends life span in mice

https://www.science.org/content/article/castration-extends-life-span-surprising-way-mouse-study-s...
1•gmays•4m ago•0 comments

Native Shell is a native UI framework built in Rust

https://github.com/longbridge/nsh
1•grejioh•7m ago•0 comments

Experiments that could win the Memory Decoding Challenge

https://aspirationalneuroscience.org/experiments/
1•arielzj•11m ago•1 comments

Tesla and SpaceX lose over $420B in combined market cap in the two days

https://www.cnbc.com/2026/11/05/tesla-spacex-stocks-fall-after-2026-midterms.html
3•Pepitobombito•12m ago•0 comments

Science does not frighten my faith

https://asheradeniyi.com/2026/05/06/science-does-not-frighten-my-faith/
1•theagsi•15m ago•0 comments

Earliest evidence of cannabis use found in ancient Siberian tomb

https://www.cnn.com/2026/11/05/science/ancient-cannabis-siberia-scli-intl
1•mooreds•15m ago•0 comments

Drone-Based Inventory Management for Nurseries

https://www.plnt.net/
2•pcomstock•16m ago•1 comments

Changes to the SmartThings Integration for Home Assistant

https://community.smartthings.com/t/changes-to-the-smartthings-integration-for-home-assistant-wha...
2•haimgel•17m ago•1 comments

Ask HN: How do you find out when someone links to your blog?

2•velcrovan•18m ago•1 comments

Newsom Moves to Empty California's Death Row by Commuting 548 Sentences

https://www.kqed.org/news/12108596/newsom-moves-to-empty-californias-death-row-by-commuting-548-s...
1•geox•19m ago•0 comments

Why You Should Care About The Political Project of Twisted

https://blog.glyph.im/2026/11/the-project-of-twisted.html
1•lumpa•20m ago•0 comments

Somebody made an AI clone of Mark Brown's indie game [video]

https://www.youtube.com/watch?v=8LMau1qXPYE
2•agnishom•24m ago•1 comments

The Dangerous Illusion of the "Two-Week AI Expert"

https://medcitynews.com/2026/11/the-dangerous-illusion-of-the-two-week-ai-expert-a-call-to-action...
1•sshah03•28m ago•0 comments

Robodinest – Robotics Supply Chain Visualize

https://robodienst.com/supply-chain/bd-atlas
1•iamanatom•29m ago•0 comments

Everything you need to know about the cybersecurity apocalypse

https://kerkour.com/cybersecurity-apocalypse
1•worik•33m ago•0 comments

Problems to Avoid When Building an Agentic Landing Page Translation System

https://www.kapwing.com/blog/ghost/#/editor/post/6aed27d52c0f98c7c385563a
1•jenthoven•43m ago•0 comments

NASA telescope is predicted to come crashing down after failed rescue mission

https://apnews.com/article/swift-observatory-nasa-telescope-e890935df7f468048594286566a96357
2•gmays•46m ago•1 comments

Switch to Safari

https://mjtsai.com/blog/2026/11/05/switch-to-safari/
2•gmays•48m ago•1 comments

Three way Git merging with meld

https://lukas.zapletalovi.com/posts/2012/three-way-git-merging-with-meld/
1•zahrevsky•52m ago•0 comments

Introduction to Mechanics for Engineers

http://ruina.tam.cornell.edu/Book/
2•pillars•53m ago•0 comments

Moving a Go CMS to encoding/JSON/v2

https://hatamoto.dev/post/moving-hatamoto-to-encoding-json-v2
1•zenincognito•54m ago•0 comments

Reachmap

https://reachmap.app/
1•wwaymonsam•56m ago•0 comments

EA re-releases 25 classic games, restores Wing Commander and Road Rash FMVs

https://www.ea.com/news/ea-classics-launch
3•bpierre•57m ago•2 comments

Ancient warriors got high on cannabis, burial mound reveals

https://www.thetimes.com/uk/history/article/scythians-cannabis-siberia-tunnug-herodotus-pm6vs6rlk
4•bookofjoe•58m ago•0 comments

Scarce Positions of Economic Power Gain from Increasingly Capable AI

https://commanding-heights.com/
1•benwen•1h ago•0 comments

Regulators approve generic HIV-prevention drug for low-income countries

https://apnews.com/article/generic-lenacapavir-gilead-who-prep-hiv-c3537796e84c54d60179eba3c56561e6
4•gmays•1h ago•0 comments

FrontierPhysics: Evaluating Agents for End-to-End Physics Research

https://arxiv.org/abs/2611.06910
2•bingran_you•1h ago•0 comments

Habla – I built a free Spanish-learning app for iOS

https://apps.apple.com/fr/app/habla-learn-spanish-fast/id6783860670
2•brmmuhoil•1h ago•0 comments