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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!

Typeclasses vs. Modules

https://sm2n.ca/articles/typeclasses-vs-modules/
1•fanf2•3m ago•0 comments

RefreshYourMac

https://refreshyourmac.com/
1•mactifosi•16m ago•0 comments

Artificial Debt

https://stitcher.io/blog/artificial-debt
1•brentroose•19m ago•0 comments

What's Eating the Office?

https://newsletter.drorpoleg.com/p/whats-eating-the-office
1•rwmj•22m ago•0 comments

Show HN: Job Board for Hypermedia Jobs

https://hypermediajobs.com/
1•alexandermorgan•31m ago•0 comments

Sham scientific societies are misleading researchers into signing up for scams

https://www.nature.com/articles/d41586-026-02980-w
2•OgsyedIE•32m ago•1 comments

Developers Delete Unit Test Lines with AI Shift

https://x.com/i/trending/2106211685782483337
2•brunaxLorax•32m ago•0 comments

Customize Claude Code with Mods in TypeScript

https://claude.com/blog/claude-code-mods
1•rbinv•34m ago•0 comments

Where the Problem Is Gone, but the Process Is Thriving

https://medium.com/@gurvinder372/article-27-where-the-problem-is-gone-but-the-process-is-thriving...
1•gps372•35m ago•0 comments

Turochamp (1948 chess program)

https://en.wikipedia.org/wiki/Turochamp
1•networked•37m ago•0 comments

The Olive Tree

https://worldsensorium.com/the-olive-tree/
1•dnetesn•37m ago•0 comments

The Space Between Two Fingers

https://blue-continuum.com/the-space-between-two-fingers
1•dnetesn•39m ago•0 comments

The Download: a biological de-aging contest and why LLMs don't reason

https://www.technologyreview.com/2026/10/02/1145666/the-download-biological-de-aging-ai-reasoning/
1•joozio•42m ago•0 comments

Patient-zero drill put health facilities to the test–40% of them failed

https://arstechnica.com/health/2026/10/patient-zero-drill-put-health-facilities-to-the-test-40-of...
1•brador•46m ago•0 comments

Flatpak from the CLI Sucks

https://kowalski7cc.xyz/blog/flatpak-from-the-cli-sucks/
1•kowalski7cc•47m ago•1 comments

Show HN: Tiny model for fast typed decisions on CPU (Gutsy)

https://github.com/kouhxp/gutsy
3•mrkn1•48m ago•0 comments

Describe it. Humans build it

https://brandforge.gg/
1•mxstermind•51m ago•0 comments

Class Action Alleges That Google Gemini Was Reading User Emails Without Consent

https://openclassactions.com/lawsuits/google-gemini-gmail-privacy-class-action.php
2•openclassaction•54m ago•0 comments

Automated UK Wills

https://lexifina.com/blog/fully-automated-wills
1•alansaber•59m ago•0 comments

Show HN: Germany's new sovereign AI model Kolibri

https://tej.as/blog/aleph-alpha-kolibri
5•tejaskumar__•1h ago•0 comments

Look at all the things he's not doing

https://andycroll.com/ruby/look-at-all-the-things-he-is-not-doing/
1•thunderbong•1h ago•0 comments

Futuresearch Evals

https://evals.futuresearch.ai
1•ronfriedhaber•1h ago•0 comments

Half of UK wants to rejoin EU and backing it could drive up Labour vote

https://www.theguardian.com/world/2026/oct/03/half-want-to-rejoin-eu-and-backing-it-could-drive-u...
7•vrganj•1h ago•0 comments

Yves Meyer's wavelet transforms – The Abel Prize 2017 [video]

https://www.youtube.com/watch?v=5Fi6TdH9poU
2•joebig•1h ago•0 comments

Terminal Velocity for Claude Code. Session Orchestrator. Live Action

https://www.youtube.com/watch?v=9tfGn3isfZU
1•quazarzero•1h ago•0 comments

A Design Space Exploration of Async/Await

https://mastodon.social/@tonofcrates/117241380083291749
3•rapnie•1h ago•1 comments

Parsing Latin poetry using constraint satisfaction

https://logical.ai/arma/
1•jruohonen•1h ago•0 comments

Leashterm – a new programming language for agents

https://github.com/jessedorrestijn2-bit/leashterm
1•Jessedor•1h ago•1 comments

Factory Planner

https://factoryplanner.net/
2•mcpcpc•1h ago•1 comments

Defensibility in AI Data: Lessons from Ads

https://twitter.com/gokulr/status/2105838034646077890
1•porridgeraisin•1h ago•0 comments