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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!

The world is rejecting science and truth, here are 5 ways to fight back

https://www.theguardian.com/commentisfree/2026/apr/28/world-rejecting-science-truth-five-ways-fig...
1•JeanKage•1m ago•0 comments

Native vs. Cross Compilation: A Love Story,a War Story and a Debugging Nightmare

http://carminatialessandro.blogspot.com/2026/04/native-vs-cross-compilation-love-story.html
2•throw324du•4m ago•0 comments

Back Up and Running

https://blog.tindie.com/2026/04/back-up-and-running/
2•zimpenfish•5m ago•1 comments

Vanishing Culture: A New Book on the Loss of Our Digital Memory

https://blog.archive.org/2026/04/23/introducing-vanishing-culture-a-new-book-on-the-loss-of-our-d...
3•robtherobber•6m ago•0 comments

The Great Oxidation Event: How Cyanobacteria Changed Life

https://asm.org/articles/2022/february/the-great-oxidation-event-how-cyanobacteria-change
3•thunderbong•6m ago•0 comments

How to distribute skills to your engineers

https://newsletter.port.io/p/how-to-build-a-skills-library-for-your-engineering-team
4•krakenwake•7m ago•0 comments

Predictive pursuit emerges in high-dimensional recurrent neural networks

https://www.biorxiv.org/content/10.64898/2026.04.23.720457v1
1•paraschopra•7m ago•0 comments

Beijing Auto Show: more EV models in each of 17 halls than in the US

https://electrek.co/2026/04/26/beijing-auto-show-2026-insane-glimpse-future-auto-industry/
2•Geekette•11m ago•0 comments

Rusternetes : A ground-up reimplementation of Kubernetes in Rust

https://github.com/calfonso/rusternetes
7•mariuz•11m ago•0 comments

Our first paying user found us from China in 4 days – zero marketing

https://mfkvault.com
2•faiyaz2139•15m ago•1 comments

Ask HN: Should it be acceptable that Excel needs to update 2-3 times/month?

3•simonebrunozzi•16m ago•0 comments

Big AI Cluster Little Power the 8x Nvidia GB10 Cluster – ServeTheHome

https://www.servethehome.com/big-cluster-little-power-the-8x-nvidia-gb10-cluster-marvell-cisco-ub...
3•rbanffy•16m ago•0 comments

Stevens Online World of Blade Runner (2001)

http://www.users.globalnet.co.uk/~stvens/BLADE.htm
2•exvi•16m ago•0 comments

The players who lost big money on Peter Molyneux's failed Legacy

https://arstechnica.com/gaming/2026/04/how-legacy-became-a-costly-crypto-bust-for-players-and-a-b...
3•rbanffy•18m ago•0 comments

Curiosity Rover Finds New Organic Molecules on Mars

https://www.universetoday.com/articles/msl-curiosity-found-new-organic-chemicals-on-mars-proof-th...
7•rbanffy•19m ago•0 comments

Tooling Up Hermes Agent

https://nedkarlovich.com/writing/tooling-up-hermes-agent
4•birdwhistler•19m ago•0 comments

openclaw ggsql

https://clawhub.ai/fanzhidongyzby/openclaw-ggsql
6•fanzhidongyzby•23m ago•0 comments

Carrot Disclosure

https://dustri.org/b/carrot-disclosure.html
3•pabs3•23m ago•0 comments

From Convergence to Confidence: Push-Button Verification for RDTs

https://kcsrk.info/verification/rdts/lean/2026/04/28/from-convergence-to-confidence/
4•matt_d•27m ago•0 comments

Show HN: Agents in Whisper Memos

https://whispermemos.com/agents
8•Void_•29m ago•0 comments

Space meteor showers visualization powered by SpaceKit.js

https://www.meteorshowers.org/
8•axbyte•33m ago•0 comments

Despite everything, a small praise of GitHub

https://davidpoblador.com/blog/despite-everything-a-small-praise-of-github.html
6•nirvanis•36m ago•0 comments

Paper Age

https://marcin.cylke.com.pl/til/2026-04-28-til-paper-age/
11•janisz•37m ago•0 comments

Workers Training Meta's AI Could Be Laid Off

https://www.wired.com/story/meta-covalen-ai-workers-layoffs/
11•tijana3290•40m ago•0 comments

The Site for Prevention of Laptop Sales

https://lars.ingebrigtsen.no/2026/03/23/the-site-for-prevention-of-laptop-sales/
6•internet_points•42m ago•0 comments

The Downfall and Enshittification of Microsoft in 2026

https://caio.ca/blog/the-downfall-and-enshittification-of-microsoft.html
9•birdculture•43m ago•1 comments

Britain's Solar Revolution Is Here; We Should Be Shouting It from the Rooftops

https://bylinetimes.com/2026/04/22/britains-solar-revolution-is-here-and-we-should-be-shouting-it...
7•robtherobber•44m ago•0 comments

Show HN: C# based Kubernetes Operator to deploy SurrealDB

https://github.com/stevefan1999-personal/surrealdb-operator
6•stevefan1999•50m ago•1 comments

Wire to Replace Signal as Standard in the Bundestag

https://www.heise.de/en/news/Digital-Sovereignty-Wire-to-Replace-Signal-as-Standard-in-the-Bundes...
24•raffael_de•54m ago•15 comments

Why Codex works better than Claude Code for my production monolith

12•anophelon•55m ago•1 comments