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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!

US millionaire big-game hunter dies after being crushed by elephants

https://www.theguardian.com/us-news/2026/apr/24/millionaire-hunter-dies-elephants-gabon
1•PaulHoule•1m ago•0 comments

Getting Lois in Defense?

1•andrebenoit11•2m ago•0 comments

If HN policy disallows AI comments, why is linking to AI generated content ok?

2•ekelsen•3m ago•2 comments

Empire of the Air (PBS, 1992)

https://archive.org/details/empire-of-the-air
1•petethomas•5m ago•0 comments

Tests suggest Russian satellites can jam GPS on a continental scale

https://arstechnica.com/space/2026/06/tests-suggest-russian-satellites-can-jam-gps-on-a-continent...
3•emot•11m ago•0 comments

Elon Musk says SpaceX doesn't need 'magic' to put AI data centers up in space

https://www.marketwatch.com/story/elon-musk-says-spacex-doesnt-need-magic-to-put-ai-data-centers-...
1•emot•12m ago•0 comments

Meta Deletes Face-Recognition System from Smart Glasses App After Wired Report

https://www.wired.com/story/meta-removes-face-recognition-code-meta-ai-app-smart-glasses/
3•littlexsparkee•12m ago•0 comments

Show HN: I recreated AOL Instant Messenger in the browser

https://www.webaim.xyz
2•RgrTheShrubbr•18m ago•0 comments

Loop Engineering

https://twitter.com/i/status/2064127981161959567
2•twapi•20m ago•0 comments

Rutger Bregman and His School for Moral Ambition Lacks Moral Ambition

https://louwrentius.com/rutger-bregman-his-school-for-moral-ambition-lacks-moral-ambition.html
1•louwrentius•20m ago•0 comments

Supporting Exchange and beyond

https://brendan.abolivier.bzh/exchange-pt-2/
1•babolivier•22m ago•0 comments

A new study says people love working from home, but does it love them back?

https://www.npr.org/2026/06/08/nx-s1-5848125/remote-work-mental-health-isolation
2•xrd•23m ago•0 comments

Exposing the Solid State Donut Battery. It's Over. [video]

https://www.youtube.com/watch?v=j5oyVNjrUPI
2•jbardnz•23m ago•0 comments

GNU Binutils 2.46.1 Released

https://sourceware.org/pipermail/binutils/2026-June/149568.html
2•edelsohn•24m ago•0 comments

Semantics for 2D Rasterization

https://arxiv.org/abs/2603.23696
2•coffeeaddict1•27m ago•0 comments

SpaceX has just officially unveiled its AI1 satellite

https://twitter.com/SawyerMerritt/status/2064108916611420273
3•redox99•30m ago•0 comments

Remembering the USS Liberty – and why it still matters

https://captimes.com/opinion/guest-columns/opinion-remembering-the-uss-liberty-and-why-it-still-m...
4•kumarski•30m ago•1 comments

170k Claude queries per gallon of gas?

https://claude.ai/share/44fdc891-0fe5-40f3-a5b5-b203bbb6ab02
2•millisecond•31m ago•1 comments

AI Is Upending One of Finance's Cushiest Jobs

https://www.bloomberg.com/news/features/2026-06-05/ai-is-upending-traditional-financial-advisor-jobs
2•ctkhn•33m ago•2 comments

JNU, an Vibe Coded Operating System

3•annoymousperson•36m ago•0 comments

AI Has Broken Hiring

https://hbr.org/2026/06/ai-has-broken-hiring-heres-how-to-fix-it
2•seafaithless•38m ago•0 comments

BofA Warns It's Time to 'Take Profits' as Red Flags Multiply

https://www.bloomberg.com/news/articles/2026-06-08/bofa-warns-it-s-time-to-take-profits-as-red-fl...
11•petethomas•46m ago•0 comments

Show HN: Mach – A compiled systems language looking for contributions

https://github.com/octalide/mach
6•octalide•51m ago•1 comments

Show HN: Ustps (UDP Speedy Transmission Protocol Secure) and USSH

https://github.com/x1colegal/USTP-Secure
3•x1colegal•56m ago•1 comments

Show HN: Sudo Report – Drudge closne for AI/tech/product

https://wwe.sudoreport.com
3•ataturkle•58m ago•0 comments

WhatsApp disrupted spear phishing attempts, asks court to hold NSO in contempt

https://arstechnica.com/tech-policy/2026/06/meta-alleges-nso-violated-spyware-injunction-with-new...
2•SockThief•1h ago•0 comments

Why Compiler Engineers Avoid Strassen's Algorithm for Matrix Multiplication

https://leetarxiv.substack.com/p/why-compilers-rarely-use-strassens-algorithm
3•birdculture•1h ago•0 comments

How to Measure Time to First Token (TTFT)

https://qainsights.com/how-to-measure-time-to-first-token-ttft-in-ai-systems/
2•qainsights•1h ago•0 comments

Germany and France Scrapped the FCAS

https://www.reuters.com/business/aerospace-defense/german-french-leaders-unable-resolve-fcas-figh...
6•signatoremo•1h ago•0 comments

Tim Cook's Final WWDC Showed Why Apple Still Always Wins in the End

https://www.inc.com/connor-jewiss/tim-cook-final-wwdc-showed-why-apple-still-always-wins-in-the-e...
4•connorjewiss•1h ago•0 comments