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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•7mo 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!

32-bit x86 Position Independent Code – It's that bad (2015)

http://ewontfix.com/18/
1•Tomte•30s ago•0 comments

Paperbacks and TikTok

https://calnewport.com/on-paperbacks-and-tiktok/
1•ahamez•31s ago•0 comments

How to Eat a Tomato (2011) [pdf]

https://ruhlman.com/wp-content/uploads/2011/08/Tomatoes.pdf
1•Tomte•46s ago•0 comments

Obsera – Real time monitopring dashboard

https://www.obsera.xyz/
1•DemiKone2•6m ago•0 comments

US regulator approves pill form of Wegovy weight-loss drug

https://www.bbc.com/news/articles/ce86le5dyxyo
1•aussieguy1234•7m ago•0 comments

Introduction to Software Reverse Engineering

https://go.mcptotal.io/blog/introduction-to-software-reverse-engineering
1•agentictime•10m ago•0 comments

Vince Zampella didn't just make hit games. He changed the medium

https://www.washingtonpost.com/entertainment/video-games/2025/12/22/vince-zampella-death-call-of-...
1•nataz•14m ago•1 comments

List of films in the public domain in the United States

https://en.wikipedia.org/wiki/List_of_films_in_the_public_domain_in_the_United_States
2•cfcfcf•15m ago•0 comments

Ask HN: How to generate Work From Home Opportunities in a locality?

1•deostroll•28m ago•0 comments

I foretold that Mac app notarization is security theater

https://lapcatsoftware.com/articles/2025/12/5.html
2•tempodox•30m ago•0 comments

Ask HN: Is there a market for buying/selling Substack publications?

1•iamevandrake•32m ago•0 comments

Eilmeldung: A TUI RSS Reader

https://github.com/christo-auer/eilmeldung
1•lwhsiao•34m ago•0 comments

Executable governance for AI: turning policy text into runnable tests

https://arxiv.org/abs/2512.04408
1•gautandatla•40m ago•1 comments

Quit social media by posting more

https://posseparty.com/
1•TiredOfLife•40m ago•0 comments

Fonts Rendering on GNU/Linux System – Pt. 0

https://blog.marichi.dev/2025/11/17/fonts-rendering-on-gnu-linux-system-pt-0
1•chauhankiran•41m ago•0 comments

AI and Travel Planning: The Case for Human Expertise

https://archaeology-travel.com/travel-tips/ai-travel-planning-the-case-for-human-expertise/
1•mucha•41m ago•0 comments

List of Unsolved Problems in Physics

https://en.wikipedia.org/wiki/List_of_unsolved_problems_in_physics
2•thunderbong•44m ago•0 comments

The essential guide to proving we've found alien life

https://www.newscientist.com/article/2507009-the-essential-guide-to-proving-weve-found-alien-life/
2•Brajeshwar•44m ago•0 comments

The LinkedIn job scam is global. The hook is local

https://restofworld.org/2025/linkedin-job-scams/
1•Brajeshwar•45m ago•1 comments

Call of Duty co-creator and Battlefield lead Vince Zampella dies in car crash

https://arstechnica.com/gaming/2025/12/vince-zampella-developer-of-call-of-duty-and-battlefield-g...
2•Brajeshwar•50m ago•2 comments

AI Is Bad UX

https://buttondown.com/apperceptive/archive/ai-is-bad-ux/
2•ankitdce•51m ago•0 comments

The Annotated Transformer (2018)

http://nlp.seas.harvard.edu//2018/04/03/attention.html
1•auraham•55m ago•1 comments

Coreless Axial Flux Motors (2015)

https://build-its-inprogress.blogspot.com/2015/02/coreless-axial-flux-motors.html
1•nill0•55m ago•0 comments

Xmas cookies under X-rays

https://europeancorrespondent.com/en/r/xmas-cookies-under-xrays
1•giuliomagnifico•1h ago•0 comments

Show HN: Luxury Yacht, a Kubernetes management app

https://github.com/luxury-yacht/app
1•johnj-hn•1h ago•0 comments

FDA approves first GLP-1 weight loss pill

https://www.novonordisk.com/news-and-media/news-and-ir-materials/news-details.html
1•jshchnz•1h ago•2 comments

Welcome to the Weird, Wonderful British Ritual of Panto Theater

https://www.bloomberg.com/news/articles/2025-12-22/welcome-to-the-weird-wonderful-british-ritual-...
2•helsinkiandrew•1h ago•3 comments

TempleOS: FlightSim and FirstPersonShooter [video] [REPOST 2015]

https://www.youtube.com/watch?v=sIbcud3E36s
1•felipelalli•1h ago•1 comments

iOS 26.3 Brings AirPods-Like Pairing to Third-Party Devices in EU Under DMA

https://www.macrumors.com/2025/12/22/ios-26-3-dma-airpods-pairing/
7•Tomte•1h ago•0 comments

Show HN: A vibe-coded database GUI

https://seaquel.app
2•mootoday•1h ago•0 comments