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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!

GitHub Family

https://github.com/JohnsonArnek/Github-Family
1•progrr_vibe_art•28s ago•1 comments

Another Way to Compare the Two Largest Economies

https://www.unz.com/bhua/another-way-to-compare-the-worlds-two-largest-economies/
1•thelastgallon•2m ago•0 comments

Virtual scrolling becomes much simpler when scrolling by index instead of pixels

https://github.com/ceriousdevtech/cerious-scroll
1•ryoucerious•4m ago•0 comments

Discussion – has anyone build a firewall for AI models yet?

1•Akhiljp•6m ago•0 comments

Ireland Is Becoming a French Military Protectorate

https://foreignpolicy.com/2026/06/18/ireland-france-military-protectorate-outsourcing-defense-pro...
2•ilamont•8m ago•0 comments

Show HN: LoomStack – Helping engineering orgs scale AI-driven development

https://loomstack.co/
1•vermaabhishek39•13m ago•0 comments

No AI data centres in my backyard, please

https://hey.paris/posts/ai-data-centres-tasmania/
2•parisidau•19m ago•0 comments

Iran war triggers global race to build oil reserves

https://www.reuters.com/commentary/reuters-open-interest/iran-war-triggers-global-race-build-oil-...
1•kaycebasques•19m ago•0 comments

The systemic decay of tech hiring

https://thoughtspile.github.io/2026/06/22/systemic-decay-of-hiring/
1•theanonymousone•20m ago•0 comments

What If the Work We're Busy Automating Is Needless?

https://www.oftwominds.com/blogjune26/needless-work6-26.html
1•spking•22m ago•0 comments

UK considers forcing social media firms to prioritise trusted news

https://www.reuters.com/legal/litigation/uk-considers-forcing-social-media-firms-prioritise-trust...
1•frm88•22m ago•0 comments

Gaussian splats on visionOS Beta

https://developer.apple.com/documentation/visionos/gaussian-splats-on-visionos
1•LoganDark•23m ago•0 comments

That I'm Using .NET

https://medium.com/c-sharp-programming/7-ways-that-im-using-net-93c669143cc8
1•sukhpinder0804•26m ago•0 comments

Seedance 2.5, generating a complete 30-second video in one go

https://twitter.com/xiaohu/status/2069236441964818508
3•vantareed•26m ago•1 comments

Vim Adventures – learning Vim by playing a game

https://www.youtube.com/watch?v=GVjtUK5JEw0
1•coolwulf•28m ago•1 comments

GLM-5.2 is the step change for open agents

https://www.interconnects.ai/p/glm-52-is-the-step-change-for-open
4•vantareed•34m ago•0 comments

Spartan Programming

https://spartan.wiki
1•skogstokig•38m ago•0 comments

Open-source security auditors for Supabase, Strapi, Hasura and Ollama

https://github.com/Perufitlife/awesome-backend-security
2•renzomad•43m ago•0 comments

Nonstop Trading, Lots of Leverage. How 'Perp Futures' Are Changing Wall Street

https://www.wsj.com/finance/commodities-futures/nonstop-trading-loads-of-leverage-how-perp-future...
4•JumpCrisscross•47m ago•0 comments

Reddit account history viewer, even for deleted posts

https://deletedby.com
2•Mobile-Spread•50m ago•2 comments

The System Moved On, but It Didn't Forget

https://webmnem.here.now/system-moved-on-but-it-didnt-forget/
1•InfraStack•53m ago•0 comments

The AI Tarpit: Why You Can't Stop Reading Your Code

https://www.williamangel.net/blog/2026/06/22/The-AI-Tarpit-Why-You-Cant-Stop-Reading-Your-Code.html
1•datadrivenangel•55m ago•0 comments

I Bought the Trump Phone [video]

https://www.youtube.com/watch?v=b1ytw85Npt8
3•billfor•56m ago•0 comments

Show HN: A 3D world you grow from your phone's camera flash

https://phronesis.world/similar
3•degibug•59m ago•0 comments

King's study finds AI chose nuclear signalling in 95% of simulated crises

https://www.kcl.ac.uk/news/artificial-intelligence-under-nuclear-pressure-first-large-scale-kings...
1•totetsu•1h ago•1 comments

Man used massage gun on his tired eyeballs. It went as well as you'd expect

https://arstechnica.com/health/2026/06/man-used-massage-gun-on-his-tired-eyeballs-it-went-as-well...
7•canucker2016•1h ago•6 comments

Ask HN: Has Codex gotten slower recently?

4•aurenvale•1h ago•0 comments

Show HN: ExtensionBooster – Get real human reviews for your apps

https://extensionbooster.net/
3•quangpl•1h ago•1 comments

How I made the firewood splitting simulator

https://old.reddit.com/r/vibecoding/comments/1uckug1/heres_how_i_made_the_firewood_splitting_simu...
4•thunderbong•1h ago•0 comments

Show HN: Loft gives thumb-keys and split-layout on a standard laptop or keyboard

https://loftkeyboard.com
4•RuleOfBirds•1h ago•0 comments