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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!

Did it use REA? Checking viral AI reverse-engineering demos

https://github.com/AIshihzong/awesome-reverse-engineer-anything/blob/main/docs/is-it-rea.md
1•AIshihzong•29s ago•0 comments

Today we're launching Petrichor (YC F26), a wet lab for frontier AI labs

https://twitter.com/Petrichorbios/status/2120290803419639914
1•hentrep•3m ago•0 comments

The CFPB says it's looking out for consumers. Data tells a different story

https://www.theguardian.com/us-news/ng-interactive/2026/nov/12/cfpb-consumer-financial-protection...
1•howard941•4m ago•0 comments

Show HN: Agent-roast – Catches coding agents that weaken tests to get CI green

https://github.com/Nari-Ab/agent-roast/
1•Nari_Ab•6m ago•0 comments

Show HN: NestDaddy, an independent search API with its own crawler and index

https://nestdaddy.com/blog/how-we-built-an-independent-search-engine
1•nestdaddy•7m ago•0 comments

Kotensor – Pure-Kotlin Transformer Engine for JVM and Android

https://github.com/TSPstudio/kotensor
1•tspstudio•8m ago•0 comments

Show HN: ScarScript – A statically typed language built in Go

https://github.com/ScarfazeCompany/scar-script
1•aimabaig•8m ago•0 comments

Bullet Dodged

https://idiotking.org/archives/2026/10/bullet-dodged-3/
2•surprisetalk•9m ago•0 comments

A lawyer used AI to write a report, but billed full time. What should I do?

1•isolli•10m ago•1 comments

Nvidia CEO Jensen Huang resigns in the wake of multiple controversies

https://www.pcworld.com/article/3283741/nvidia-ceo-jensen-huang-resigns-in-the-wake-of-multiple-c...
2•MINTYSTAR12•11m ago•1 comments

Gary Marcus: Jensen Huang Resigns

https://garymarcus.substack.com/p/jensen-huang-resigns
3•swolpers•11m ago•0 comments

One MacBook Pro Beat Apple's Four Mac Studios at WWDC26 LoRA Fine-Tuning

https://nuketorch.ai/blog/#one-vs-four
1•klay_moon•12m ago•1 comments

Show HN: Interactive HDR and Wide-Gamut WebGPU Planetary Elevation Visualization

https://agaura.github.io/elevation_atlas/index.html
1•clubers•12m ago•0 comments

Turkish Letter Keeps Breaking the Software [video]

https://www.youtube.com/watch?v=Ke-_V_XT5i4
1•birdculture•13m ago•0 comments

Fable 5.2: The Self-Improvement Loop Keeps Loopin' (Plus Gemini Carbon) [video]

https://www.youtube.com/watch?v=583ThJIqQ7k
1•doener•14m ago•0 comments

US Panics Is It Time to Invest in Europe? [video]

https://www.youtube.com/watch?v=Rr0RoXuUsCE
1•doener•14m ago•0 comments

Introduction to the viridis color maps (2024)

https://cran.r-project.org/web/packages/viridis/vignettes/intro-to-viridis.html
1•robin_reala•14m ago•0 comments

Top Intel Dem unsure if Alice Huang is a Chinese spy

https://www.politico.com/news/2026/11/11/jim-himes-alice-huang-nvidia-spy-01161718
1•anon373839•15m ago•0 comments

Proof of the Riemann Hypothesis in Lean

https://github.com/startigerjln/Nielsen-and-Semita-Riemann-Proof-in-Lean4/
3•chasingbrains•17m ago•1 comments

Jensen Huang Resigns as Nvidia CEO: What Happens Next for AI Chips?

https://oplexa.com/blogs/jensen-huang-resigns-nvidia-ceo-november-2026/
1•oplexa07•17m ago•0 comments

Kwatch v1.2.0: Kubernetes failure root cause, now with a read-only dashboard

https://blog.kwatch.dev/kwatch-v1-2-0
1•abahmed•17m ago•0 comments

I built this for maldoc triage

https://github.com/debugactiveprocess/MaldocTrace
2•ironbits•19m ago•0 comments

Karuma – Open UCP and Schema.org readiness scanner for e-commerce

https://karuma.dev/en
2•dimoncelli•21m ago•0 comments

Everything Is a Remix (and I'm a Remixer Too)

https://canro91.github.io/2026/11/11/Remix/
2•speckx•22m ago•0 comments

Show HN: Turri – a coding agent with the power of regenerative software

https://github.com/turri-oss/turri
5•ponoru•26m ago•3 comments

Flying without knowing how the plane works

https://friendlyai.dev/blog/freeing-your-ai-from-your-computer/
10•FriendlyMike•27m ago•1 comments

Astronomers Find Hints of Star Population That Failed to Explode

https://www.caltech.edu/about/news/astronomers-find-hints-of-star-population-that-failed-to-explode
2•gmays•27m ago•0 comments

AMD EPYC 9006 Venice Unveiled: Inside the Zen 6 Architecture

https://hothardware.com/reviews/amd-epyc-9006-venice-zen-6-architecture-reveal
3•rbanffy•27m ago•0 comments

Show HN: I built the MTV my 13yo self wish existed

https://moodplaylist.com/
2•01jonny01•27m ago•0 comments

Advanced AI models could infer the activity of the brain

https://english.elpais.com/science-tech/2026-11-09/karl-deisseroth-nobel-prize-in-physiology-or-m...
2•geox•28m ago•0 comments