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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•10mo 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!

Progress on Starbase Pads Ahead of Block 3 Starships

https://www.nasaspaceflight.com/2026/03/progress-starbase-pads-block-3-starships/
1•JumpCrisscross•6m ago•0 comments

When the bill comes due: the economics of AI coding tools

https://daniakash.com/blog/when-the-bill-comes-due
1•DaniAkash•9m ago•0 comments

Exceptional fake SSD clone of Samsung 990 Pro is almost impossible to spot

https://www.tomshardware.com/pc-components/ssds/exceptional-fake-ssd-clone-of-samsung-990-pro-is-...
3•speckx•17m ago•1 comments

Kemforge, a Quantum-Safe curl alternative to test ML-KEM

https://github.com/ConnectingApps/kemforge
1•DaanAcohen•18m ago•0 comments

Show HN: a Rust CLI to automatically swap monitor focus based on your gaze

https://github.com/pranavkarthik10/miru
3•treexs•21m ago•1 comments

Why Semi-Autonomous, Not Autonomous?

https://reikon.io/blog/semi-autonomous/
1•Monotoko•23m ago•1 comments

Don't Trust, Verify

https://daniel.haxx.se/blog/2026/03/26/dont-trust-verify/
2•lwhsiao•25m ago•0 comments

From latent spaces to JWTs: how agents taught me backend

https://blog.cobanov.dev/blog/agents
2•cobanov•28m ago•0 comments

When Brands Wear an Insult as a Badge of Honor

https://sloanreview.mit.edu/article/when-brands-wear-an-insult-as-a-badge-of-honor/
2•gnabgib•30m ago•0 comments

Lifetime subscriptions don't mean what you think they mean

https://productimpossible.com/review/lifetime-subscriptions-trap/
4•lest•35m ago•1 comments

Camden, N.J., Cut Its Murder Rate to a 40-Year Low

https://www.nytimes.com/interactive/2026/03/27/headway/camden-nj-murder-rate-gun-violence.html
1•JumpCrisscross•36m ago•0 comments

Gaza toddler released from Israeli custody with 'cigarette burn' wounds

https://web.archive.org/web/20260000000000*/https://www.middleeasteye.net/news/gaza-toddler-relea...
15•Imustaskforhelp•39m ago•10 comments

Off Grid Fteepee

https://klumpen.eu/
1•worik•39m ago•0 comments

Rivian Made Car Dealers Back Down in Washington. More States May Be Next

https://www.wsj.com/business/autos/rivian-made-car-dealers-back-down-in-washington-more-states-ma...
1•JumpCrisscross•41m ago•0 comments

Please Stop Talking about "Zoomers" and "Gen Alpha"

https://www.richardhanania.com/p/please-stop-talking-about-zoomers
2•paulpauper•43m ago•0 comments

Did Paul Conyngham use AI to develop a cancer treatment for his dog?

https://hedonicescalator.substack.com/p/did-paul-conyngham-really-use-ai
1•paulpauper•44m ago•0 comments

Sylve – Proxmox Alternative by FreeBSD

https://sylve.io/
2•imbobbytables•46m ago•0 comments

The Revenge of the Data Scientist

https://hamel.dev/blog/posts/revenge/
1•hamelsmu•46m ago•0 comments

Nothing new to see here

https://feld.com/archives/2026/03/nothing-new-to-see-here/
7•guiambros•52m ago•3 comments

The Nap Room Didn't Love Me Back

https://www.thenation.com/article/society/the-nap-room-didnt-love-me-back/
2•mitchbob•52m ago•1 comments

Show HN: testing Ansible playbooks *fast*

https://github.com/lucasluitjes/ansible-lxd-boilerplate
2•lucasluitjes•54m ago•0 comments

Make Space for Every Voice: Reflect, Headline, Discussion

https://pointc.co/make-space-for-every-voice/
1•walterbell•57m ago•0 comments

A silly little trivia game I made

https://veritas.axiomatik.net/
1•stealth_dev•58m ago•0 comments

The American Soldier [pdf]

https://gwern.net/doc/psychology/1949-stouffer-theamericansoldier-v1-adjustmentduringarmylife.pdf
1•hbarka•59m ago•0 comments

Hardware Image Compression

https://www.ludicon.com/castano/blog/2026/03/hardware-image-compression/
1•luu•1h ago•0 comments

Humans Are Amazing

https://v5.chriskrycho.com/journal/humans-are-amazing/
3•walterbell•1h ago•0 comments

Usability – Catch common usability problems before user testing

https://www.userium.com/
1•calmnordic•1h ago•0 comments

Anthropic's 'Claude Mythos' Leak

https://www.coindesk.com/markets/2026/03/27/anthropic-s-massive-claude-mythos-leak-reveals-a-new-...
2•geoffbp•1h ago•0 comments

Basic Physics Engine in about 100 lines of pure JavaScript

https://slicker.me/javascript/physics/physics_engine.htm
3•thunderbong•1h ago•1 comments

Show HN: Canary – Monitor any URL for changes, get AI-powered intelligence

2•iambel0ved•1h ago•1 comments