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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!

IPv6 just turned 30 and still hasnt taken over the world, dont call it a failure

https://www.theregister.com/2025/12/31/ipv6_at_30/
2•Bender•1m ago•0 comments

CATL Makes Big Announcement on Sodium Batteries for 2026

https://cleantechnica.com/2025/12/29/catl-makes-big-announcement-on-sodium-batteries-for-2026/
1•ksec•5m ago•0 comments

Peek-a-boo and the First Lesson in Awareness [essay]

https://omegaaxiommeta.substack.com/p/why-we-play-peek-a-boo-contrast-pattern
1•nilegreen•10m ago•1 comments

Enough of the 'Hey you ' faux-friend nonsense. You're a business, not my mate

https://www.theguardian.com/commentisfree/2026/jan/01/the-hill-i-will-die-on-business-friend-indi...
2•beardyw•13m ago•0 comments

Built AI chatbot platform to be 100% EU-hosted after customers refused OpenAI

https://www.chatvia.ai
1•mayahi•18m ago•0 comments

Bulgaria joins euro area from 1 January

https://ec.europa.eu/commission/presscorner/detail/de/ip_25_3123
2•yreg•19m ago•0 comments

China builds a record-breaking hypergravity machine to compress space & time

https://www.google.com/url?q=https://www.scmp.com/news/china/science/article/3338193/china-builds...
1•mnming•20m ago•0 comments

Windows 11 Outperforming Linux on an Intel Arrow Lake H Laptop

https://www.phoronix.com/review/windows-beats-linux-arl-h
13•tuananh•23m ago•3 comments

Deltax: A non-decision AI governance framework with explicit stop conditions

https://zenodo.org/records/18100154
1•DELTA-X•23m ago•1 comments

Bluetooth Headphone Jacking: A Key to Your Phone [video]

https://media.ccc.de/v/39c3-bluetooth-headphone-jacking-a-key-to-your-phone
1•AndrewDucker•26m ago•0 comments

V programming language version 0.5 released

https://github.com/vlang/v/releases/tag/0.5
2•hggh•27m ago•0 comments

Show HN: 1seed – Derive all your crypto keys from a single seed

https://github.com/oeo/1seed
1•genesishash•28m ago•0 comments

Show HN: BakwasLogin – A user-hostile login with physics-based password entry

https://www.bakwaslogin.app/
2•bhavesh_kukreja•34m ago•0 comments

IQuest-Coder: Open model w/ 81.4% on SWEBench

https://iquestlab.github.io/
5•denysvitali•35m ago•0 comments

Role of psychological strengths in positive life outcomes in adults with ADHD

https://www.cambridge.org/core/journals/psychological-medicine/article/role-of-psychological-stre...
1•bookofjoe•35m ago•1 comments

Bulk image conversion client-side using Web Workers

1•lemongravity•36m ago•0 comments

Navigating Moats in the AI Transition

https://shaokang.substack.com/p/navigating-moats-in-the-ai-transition
1•Wraecca•38m ago•0 comments

Facebook is testing a link-posting limit for professional accounts and pages

https://techcrunch.com/2025/12/17/facebook-is-testing-a-link-posting-limit-for-professional-accou...
3•austinallegro•40m ago•0 comments

I rebooted my social life

https://takes.jamesomalley.co.uk/p/this-might-be-oversharing
3•edent•41m ago•0 comments

Can a Commodore 1541 disk drive be used as a general purpose computer? [video]

https://www.youtube.com/watch?v=6loDwvG4CP8
2•amichail•42m ago•0 comments

China's CXMT eyes $4.2B Shanghai listing to fund DRAM expansion

https://www.reuters.com/world/asia-pacific/chinas-cxmt-eyes-42-billion-shanghai-listing-fund-dram...
1•ksec•49m ago•1 comments

Rust–: Rust without the borrow checker

https://github.com/buyukakyuz/rustmm
17•ravenical•50m ago•11 comments

The Tech We've Lost in 2025

https://www.cnet.com/tech/the-tech-weve-lost-in-2025/
1•taubek•50m ago•1 comments

Show HN: Mailcow/Rspamd kept missing obvious spam so I built my own email filter

https://email-filter.ai/
1•rodoni•52m ago•0 comments

Free AI Stamp Generator and Online Stamp Maker

https://stampgenerator.net/
1•qweasdzxc111111•52m ago•0 comments

Wicked Engine: 3D engine with modern graphics

https://github.com/turanszkij/WickedEngine
1•ksec•53m ago•0 comments

Show HN: Awesome Symbian

1•catstor•53m ago•1 comments

Crown: The Flexible Game Engine

https://www.crownengine.org/
1•ksec•54m ago•0 comments

Gnashing of Teeth

https://www.250bpm.com/p/gnashing-of-teeth
1•tosh•1h ago•0 comments

How did the world change in 2025?

https://frontier2025.netlify.app/
1•que3216•1h ago•0 comments