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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•11mo 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!

Richard Sutton – Father of RL thinks LLMs are a dead end [video]

https://www.youtube.com/watch?v=21EYKqUsPfg
1•mpweiher•48s ago•0 comments

Company says nuclear fusion could power the grid – and soon

https://www.cnn.com/2026/04/30/climate/nuclear-fusion-real-world-electricity-grid
1•mpweiher•1m ago•0 comments

A 360° panorama generator that turns one sentence into a world

https://imagesv2.ai/
1•taoji1994•2m ago•0 comments

Systemd-manager-TUI: A TUI application for managing systemd services

https://github.com/Matheus-git/systemd-manager-tui
1•thunderbong•4m ago•0 comments

Re-Imagining GitHub/GitLab Actions

https://almostintuitive.com/docs/technical/reimagining-github-actions/
1•legothief•5m ago•0 comments

The Problem with Open Hardware [video]

https://www.youtube.com/watch?v=YLn4vnfchaE
1•Udo_Schmitz•9m ago•0 comments

Shares in Japanese toilet maker Toto soar on AI-related pivot

https://www.ft.com/content/38969e97-92e4-4066-a554-27274d32d545
1•JumpCrisscross•9m ago•0 comments

Names Are the First Thing You Read and the Last Thing You Remember

https://fagnerbrack.com/names-are-the-first-thing-you-read-and-the-last-thing-you-remember-b2b3f0...
1•fagnerbrack•10m ago•0 comments

Dependencies Are Replacing Knowledge

https://www.youtube.com/watch?v=99RgPS3Vu5M
1•birdculture•10m ago•0 comments

Becoming Unblockable

https://www.seangoedecke.com/unblockable/
2•fagnerbrack•11m ago•0 comments

Migrating 6000 React tests using AI Agents and ASTs

https://eliocapella.com/blog/ai-library-migration-guide/
1•fagnerbrack•11m ago•0 comments

Three full-stack data platforms in a weekend: Fabric and Azure AI Foundry

https://cubiczan.substack.com/p/how-we-shipped-3-full-stack-data
1•cubiczan•13m ago•0 comments

If society had a scorecard, what would be on it?

1•baptou12•16m ago•1 comments

Edible Plants Wiki

https://edibleplants.wikioasis.org/wiki/Main_Page
1•altilunium•24m ago•0 comments

Mnemory – Persistent memory for AI agents

https://github.com/fpytloun/mnemory
1•genunix64•27m ago•1 comments

Show HN: WebAssembly Interpreter in a Header

https://github.com/lifthrasiir/wah
1•lifthrasiir•28m ago•0 comments

Codeonix: Python task automation for your desktop – with AI, 14 triggers

https://codeonix.app
2•hassananayi•28m ago•1 comments

A month after being laid off, I wrote the story I needed to make sense of it

https://anushkakarmakar.substack.com/p/1-why-did-i-choose-to-run-that-marathon
1•thinkingkite•29m ago•0 comments

Why CFOs Need a Consensus Hardening Protocol for AI Decisions

https://cubiczan.substack.com/p/why-cfos-need-a-consensus-hardening
1•cubiczan•32m ago•0 comments

As a Ukrainian journalist, I've covered the US for 20 years. I find it shocking

https://www.theguardian.com/world/2026/apr/30/as-a-ukrainian-journalist-ive-covered-the-us-for-20...
1•YeGoblynQueenne•33m ago•0 comments

Graphene is on track to deliver on its promises (2019)

https://www.nature.com/articles/s41565-019-0557-0
1•simonebrunozzi•34m ago•0 comments

Livecodes – A Code Playground That Just Works

https://github.com/live-codes/livecodes
1•modinfo•44m ago•0 comments

Fujian Tulou

https://en.wikipedia.org/wiki/Fujian_tulou
1•simonebrunozzi•46m ago•0 comments

KMRI: A chunk-based compression format for MRI-style 3D volumes

https://github.com/Kiamehr5/KMRI
1•kiamehr•48m ago•0 comments

Ripple – the elegant TypeScript UI framework

https://www.ripple-ts.com/
2•modinfo•50m ago•0 comments

SMS blaster rising in Switzerland (French)

https://www.rts.ch/info/suisse/2026/article/sms-blaster-l-arnaque-aux-fausses-amendes-se-repand-d...
2•kuon•51m ago•0 comments

Man tar why we use -f

1•modinfo•54m ago•0 comments

Getting Gooier

https://contraptions.venkateshrao.com/p/getting-gooier
1•jger15•54m ago•0 comments

The Lore of Sam Altman Is Being Tested Like Never Before

https://www.wsj.com/tech/ai/the-lore-of-sam-altman-is-being-tested-like-never-before-968227ea
1•JumpCrisscross•56m ago•0 comments

Wikipedia in the Terminal

https://github.com/ImpulseDoes/wiki
2•thximpulse•1h ago•1 comments