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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!

Show HN: Reelbase – Create Viral TikTok Slideshows in Seconds (Reelbase.io)

https://reelbase.io
1•Launchr•3m ago•0 comments

HPV vaccination reduces oncogenic HPV16/18 prevalence from 16% to <1% in Denmark

https://www.eurosurveillance.org/content/10.2807/1560-7917.ES.2025.30.27.2400820
2•stared•6m ago•0 comments

Information Lives in the Breaks

https://omegaaxiommeta.substack.com/p/information-lives-in-the-breaks
2•nilegreen•6m ago•1 comments

Global Crackdown on Crypto Tax Evasion Now in Force

https://timescrypto.com/cryptonews/regulation-and-policy/global-crackdown-on-crypto-tax-evasion-n...
2•Alan_Rada•9m ago•0 comments

An Experiment in Vibe Coding

https://nolanlawson.com/2025/12/28/an-experiment-in-vibe-coding/
1•ColinEberhardt•17m ago•0 comments

Show HN: I stopped using meditation techniques and just sat still for 30 days

https://prtkagwl.substack.com/p/sitting-and-doing-nothing-a-30-day
1•btwnplaces•18m ago•0 comments

Show HN: Vect AI – An execution-first marketing OS for SaaS founders

https://x.com/MM_AFRAZ
1•WoWSaaS•19m ago•0 comments

I optimised my vibe coding tech stack cost to $0

3•udit_50•22m ago•1 comments

Show HN: 3D Rendering in the Terminal from Scratch

https://github.com/Mr-Robot-err-404/terminal-wireframe
1•doctor_schultz•29m ago•0 comments

Toby Morton, a Comedy Writer, Owns the Trump Kennedy Center URL

https://www.nytimes.com/2026/01/01/us/politics/trump-kennedy-center-website-toby-morton.html
2•reaperducer•33m ago•0 comments

The Developer is dead, long live the Designer

https://deadend.dev/posts/the-developer-is-dead-long-live-the-designer/
2•Dansvidania•34m ago•0 comments

Sorting with Fibonacci numbers, and a Knuth reward check

https://orlp.net/blog/fibonacci-sort/
2•fanf2•34m ago•0 comments

Nexperia in no-man's-land: how a chip company became caught between world powers

https://www.nrc.nl/nieuws/2025/12/30/nexperia-in-no-mans-land-how-a-chip-company-became-caught-be...
1•chvid•38m ago•0 comments

Combinatorics News

https://gilkalai.wordpress.com/2026/01/01/combinatorics-news/
2•tzury•42m ago•0 comments

Conbini Wars

https://conbini.kikkia.dev/
2•denysvitali•50m ago•0 comments

Horrible fire at the Swiss ski resort bar

https://www.reuters.com/world/europe/several-killed-after-explosion-swiss-ski-resort-bar-bbc-repo...
1•barishnamazov•50m ago•2 comments

Why Big Tech Turns Everything into a Knife Fight

https://medium.com/data-science-collective/why-big-tech-turns-everything-into-a-knife-fight-42e22...
2•thunderbong•55m ago•1 comments

Train Dreams, il Netflix che non ti aspetti – CinEmanuele #15

https://cinemanuele.substack.com/p/train-dreams-il-netflix-che-non-ti
1•grouchoromano•56m ago•0 comments

Swapping two blocks of memory inside a larger block, in constant memory

https://devblogs.microsoft.com/oldnewthing/20260101-00/?p=111955
2•paulmooreparks•57m ago•0 comments

GridInspector- OpenStreetMap QA for Power Grids

https://apps.dynartio.com/mapyourgrid/gridinspector.html
3•protontypes•57m ago•0 comments

Dbcli skills agent tool with 30 databases support

https://github.com/tteamtm/dbcli
2•teamwg•1h ago•0 comments

Archive of DEC's Easynet NOTESfiles

https://decnotes.datacellar.net/
1•bilegeek•1h ago•0 comments

Show HN: Exponential CMS 6.0.11 – PHP 8.5 Support for a CMS Born in the 1990s

https://exponential.earth
2•thekracker•1h ago•1 comments

Shipping at Inference-Speed

https://steipete.me/posts/2025/shipping-at-inference-speed
3•tosh•1h ago•0 comments

Calvo on 'CHamoru' spelling: It's for government efficiency, cultural accuracy

https://www.guampdn.com/news/calvo-on-chamoru-spelling-its-for-government-efficiency-cultural-acc...
1•sipofwater•1h ago•1 comments

Show HN: cspresso - CLI tool to scan a website & generate/evaluate a CSP header

https://cspresso.cafe
2•_mig5•1h ago•0 comments

A terminal-based browser with Sixel graphics

https://codeberg.org/janantos/brow6el
5•rcarmo•1h ago•1 comments

I'm building a 30k‑line V12 codebase solo with a "team" of 4 AIs

5•garylauchina•1h ago•2 comments

Show HN: I built a privacy-first, client-side 8-bit avatar generator

https://squareface.app/
1•hugh1st•1h ago•1 comments

A quantum-resistant RNG powered by collective human entropy

3•EntropyGrid•1h ago•0 comments