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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!

Jj v0.43.0 Released

https://github.com/jj-vcs/jj/releases/tag/v0.43.0
1•birdculture•56s ago•0 comments

FreeCAD: New Addon; Banana for Scale

https://blog.freecad.org/2026/07/12/new-addon-banana-for-scale/
1•Klaster_1•1m ago•0 comments

Morosx MX88 Manet [video]

https://www.youtube.com/watch?v=yFxEGkT_pfw
1•marklit•4m ago•0 comments

Waldi: A quiet place to write, and to be read

https://github.com/waaldev/waldi
1•waaldev•6m ago•0 comments

AI backlash hits university: laptops and phones banned for law students

https://www.foxnews.com/media/ai-backlash-reaches-major-university-bold-ban-laptops-phones-students
1•01-_-•7m ago•0 comments

MRI Grid Viewer

https://github.com/MarvinSchwaibold/mri-grid-viewer
1•dsego•8m ago•0 comments

IT administrators are "fed up" with Microsoft's "useless" apps and Windows 11

https://www.neowin.net/news/it-admins-feel-overwhelmingly-sick-of-microsoft-and-windows-11-garbag...
2•01-_-•10m ago•0 comments

What Makes Humans Stupid

https://nautil.us/what-makes-humans-stupid-1282459
2•imartin2k•11m ago•0 comments

On-call Engineer 2026 [video]

https://www.youtube.com/watch?v=sY1UqUuBqQQ
1•throwaway2027•13m ago•0 comments

Woman in Brazil enslaved for 55 years by 3 generations of the same family

https://english.elpais.com/international/2026-07-10/woman-rescued-in-brazil-after-being-enslaved-...
2•RetroTechie•14m ago•0 comments

X for Y Programmers

https://www.chrisfinke.com/x-for-y/
1•joshbetz•15m ago•0 comments

Old and new apps, via modern coding agents by Terry Tao

https://terrytao.wordpress.com/2026/07/11/old-and-new-apps-via-modern-coding-agents/
2•subset•23m ago•0 comments

Mnema: A local, encrypted memory layer for AI agents

https://github.com/MerlijnW70/mnema
1•MerlijnW70•23m ago•0 comments

Memory makers are slaves to the boom-bust rollercoaster

https://www.theregister.com/ai-and-ml/2026/07/12/memory-makers-are-slaves-to-the-boom-bust-roller...
1•jnord•23m ago•0 comments

Putin Turned Japan into a Den of Spies

https://www.nytimes.com/2026/07/12/world/asia/russia-spies-japan-war-drones-electronics.html
3•JumpCrisscross•25m ago•1 comments

Show HN: Dr. Wong – an AI space for journaling and self-reflection

https://www.drwongai.com
1•superyuan•25m ago•0 comments

A Gang of Thieves Pulled Off a Multimillion-Dollar Data Center Heist

https://www.nytimes.com/2026/07/12/magazine/data-center-heist.html
2•reaperducer•27m ago•1 comments

A Python data-handling pattern (gDS) & framework for testing concurrent systems

https://www.testingcomplexsystems.com
1•TAlborough•27m ago•0 comments

Louis de Bernières children's childhood ended the moment they got smartphones

https://www.rnz.co.nz/life/books/as-far-as-i-can-see-my-children-s-childhood-ended-the-moment-the...
2•tigerlily•31m ago•0 comments

Scientists' Side Hustle? Using AI and Quantum Computing to Generate New Peptides

https://www.wired.com/story/scientists-using-ai-and-quantum-computing-to-generate-new-peptides/
2•joozio•32m ago•0 comments

AI Agents Are About to Change Payments Operations

https://open.spotify.com/episode/41kRSmDW5IKhvamyzlPxqq
2•siroj•33m ago•1 comments

25% long-form social media posts appear AI-generated

https://www.theregister.com/ai-and-ml/2026/07/09/ai-slop-writing-has-taken-over-the-internet-part...
3•u1hcw9nx•34m ago•1 comments

Laws of Project Management

https://www.lucasfcosta.com/blog/laws-of-software-project-management
3•lucasfcosta•35m ago•0 comments

Some features work in design meetings but fail in the real world

https://mattcasmith.net/2026/07/12/feature-design-testing
1•mattcasmith•36m ago•0 comments

OpenAI's Head of Safety Is Leaving the Company

https://www.wired.com/story/openai-head-of-safety-leaving/
4•theanonymousone•37m ago•0 comments

Databricks AI Agent Genie Code Is No Longer Free. Now You Have to Pay as You Go

https://medium.com/databrickscommunity/databricks-ai-agent-genie-code-is-no-longer-free-now-you-h...
2•protmaks•39m ago•0 comments

Databricks News: CLI v1.0.0, AI-tools, Docker, DABs UI sync, mutators

https://medium.com/databrickscommunity/databricks-news-cli-v-1-0-0-ai-tools-last-updated-25th-may...
1•protmaks•40m ago•0 comments

Understanding the Databricks Genie Family: Which Genie Is Right for You?

https://medium.com/databrickscommunity/understanding-the-databricks-genie-family-which-genie-is-r...
1•protmaks•40m ago•0 comments

The Proportional Web

https://owickstrom.github.io/the-proportional-web/
2•g0xA52A2A•42m ago•0 comments

Chasing new skills, going back to basics: how software engineers adapting to AI

https://www.theguardian.com/technology/ng-interactive/2026/jul/12/software-developers-engineers-ai
1•beardyw•42m ago•0 comments