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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!

Stwipe – Payments infrastructure for people who cannot be reasoned with

https://stwipe.com
1•nderjung•1m ago•0 comments

In 1987, a Student Set Out to Fix a Mac Problem. Ended Up Creating "Photoshop"

https://dailygalaxy.com/2026/04/knoll-brothers-photoshop-creation-story/
1•rmason•3m ago•0 comments

Creative Ideas Emerge to Make Data Centers Beautiful Amid NIMBY Backlash

https://x.com/i/trending/2049962384308289888
1•rmason•7m ago•0 comments

Australia wants to be first nation in the world to eliminate a cancer

https://www.bbc.com/news/articles/cd6w15vgp7lo
1•dabinat•7m ago•0 comments

Senate Panel Backs Guard Act, AI Age Verification Bill

https://reclaimthenet.org/senate-panel-backs-guard-act-ai-age-verification-bill
2•anonymousiam•8m ago•0 comments

FireImg Is Live

https://www.fireimg.com/demo/
1•mjnestor•12m ago•0 comments

Making Money (Or Not) Writing

https://countercraft.substack.com/p/on-making-money-or-not-writing
1•crescit_eundo•14m ago•0 comments

When a Species' Survival Hinges on Every Single Embryo

https://nautil.us/when-a-species-survival-hinges-on-every-single-embryo-1280373
2•Brajeshwar•14m ago•0 comments

Turning chess into a roguelike via design first principles

https://elbowgreasegames.substack.com/p/below-the-crown-launches-10
1•spacemarine1•17m ago•0 comments

I Built an L1 Blockchain Alone in Indonesia

https://paragraph.com/@satyakwikp@gmail.com/i-built-an-l1-blockchain-alone-heres-whats-actually-r...
1•sentrixchain•21m ago•0 comments

Linux averaging ~350 CVEs per day

https://crib.social/notice/B5rY6M7oM93li4Takq
1•gslepak•21m ago•0 comments

PDF Editify

https://pdfeditify.com/
1•Benish_Zulfiqar•22m ago•0 comments

True Frontier labs in India: What do we need to make it happen?

https://twitter.com/ponnappa/status/2050261742174028026
1•ridiculous_leke•24m ago•0 comments

Whimsical Animations Course Open House

https://courses.joshwcomeau.com/wham/open-house/00-introduction
9•SpyCoder77•24m ago•1 comments

Token spend breaks budgets – what next?

https://newsletter.pragmaticengineer.com/p/the-pulse-token-spend-breaks-budgets
1•keeda•27m ago•0 comments

Why Half Your Skills Expire Every Few Years

https://arpitbhayani.me/blogs/half-life/
1•jojobhai•27m ago•0 comments

I Have Lived in Your Camp

https://green.spacedino.net/i-have-lived-in-your-camp/
1•exceptione•28m ago•0 comments

AI is starting to beat doctors at making correct diagnoses

https://www.science.org/content/article/ai-starting-beat-doctors-making-correct-diagnoses
2•bglazer•28m ago•0 comments

The AI scaffolding layer is collapsing. LlamaIndex's CEO explains what survives

https://venturebeat.com/infrastructure/the-ai-scaffolding-layer-is-collapsing-llamaindexs-ceo-exp...
1•momentmaker•31m ago•0 comments

Running Doom on a Travel Router with Touch Screen

https://hackaday.com/2026/05/01/running-doom-on-a-travel-router-with-touch-screen/
1•momentmaker•32m ago•0 comments

The Case for Euthanizing Everyone at Age 65

https://marshallbrain.com/youve-had-your-turn-the-case-for-euthanizing-everyone-at-age-65
2•p2detar•33m ago•1 comments

Elegy for the Hereditary Peers

https://engelsbergideas.com/essays/elegy-for-the-hereditary-peers/
1•bookofjoe•34m ago•0 comments

GIMP 3.4 Will probably draw circles

https://fosstodon.org/@CmykStudent/116455148076446506
3•marcodiego•35m ago•0 comments

Claude Code completes the first level of several ARC AGI 3 games

https://arc-agi-runs.web.app/ls20-47471d22-3e73-4d9b-8ff7-972ef3ea5195/
1•dextersjab•35m ago•1 comments

Upcoming Blender Development Fund and AI Policies

https://www.blender.org/news/upcoming-blender-development-fund-and-ai-policies/
1•dagmx•37m ago•0 comments

Pentagon inks deals with AI giants, but not Anthropic

https://www.dw.com/en/pentagon-inks-deals-with-ai-giants-but-not-anthropic/a-77012715
3•herodoturtle•38m ago•0 comments

The anatomy of message execution after an API returns 200 OK

https://blog.bridgexapi.io/the-anatomy-of-message-execution-what-happens-after-your-api-returns-2...
1•Bridgexapi•39m ago•0 comments

Our poor sleeping habits are filling our brains with neurotoxins (2015)

https://qz.com/424120/our-poor-sleeping-habits-could-be-filling-our-brains-with-neurotoxins
1•downbad_•39m ago•1 comments

Show HN: Pixel-Perfect MaterialX in Blender and Three.js

https://ben3d.ca/blog/pixel-perfect-materialx-in-blender-and-threejs
1•bhouston•40m ago•0 comments

5x speedup of sqlglot (pure Python SQL parser) with mypyc

https://www.fivetran.com/blog/how-we-accelerated-transpilation-by-compiling-sqlglot-with-mypyc
1•captaintobs•43m ago•0 comments