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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!

How the Barcode Was Invented

https://worldofsystems.co/invention-of-the-barcode/
1•JumpCrisscross•2m ago•0 comments

Reconsidering the Heritability of Intelligence in Adulthood

https://pmc.ncbi.nlm.nih.gov/articles/PMC3276760/
1•gmays•2m ago•0 comments

Every Household in This Rural Town Receives $10k If a Data Center Gets Built

https://www.wsj.com/real-estate/every-household-in-this-rural-town-receives-10-000-if-a-data-cent...
1•JumpCrisscross•2m ago•1 comments

Washington Taxed Its Millionaires. Now the Rich Want It Repealed

https://www.nytimes.com/2026/09/27/us/politics/washington-state-millionaires-tax.html
1•JumpCrisscross•4m ago•0 comments

Show HN: Stepgate – an MCP server that won't let agents skip steps

https://github.com/Chaarangan/stepgate
1•charangan•6m ago•0 comments

Klassik Revives the KDE 3 Desktop on Modern Plasma 6

https://linuxiac.com/klassik-revives-the-kde-3-desktop-on-modern-plasma-6/
1•turrini•8m ago•0 comments

Can a time-decaying rewards work accross merchants?

2•kundan__s•10m ago•0 comments

Arsumbris: Malleable, agent-native IDE for typed knowledge

https://github.com/arsumbris/arsumbris
1•handfuloflight•10m ago•0 comments

Financing of historic AI buildout raises systemic risks in US, researcher says

https://www.reuters.com/business/finance/financing-historic-ai-buildout-raises-systemic-risks-us-...
1•defrost•13m ago•0 comments

I Made a Flashcards App

https://learnet.app/
1•decompile1•14m ago•0 comments

Little Sally's Carnival

https://soniakayperkinsofficial.substack.com/p/little-sallys-carnival
1•kayperkins45•15m ago•0 comments

Show HN: Ghostfox – Self-hosted stealth browser for AI agents

https://github.com/autokeren/ghostfox
1•ajat82•18m ago•0 comments

Jevlint: Fuzzy Linter

https://jevlint.dev/
1•handfuloflight•18m ago•0 comments

Show HN: ParkourNote – A research workspace, built solo in a month with Claude

https://note.parkourlabs.io/
1•sushiwang•32m ago•0 comments

Show HN: Help us fire our UI/UX designers

https://vosu.ai
1•nafisfaysal•34m ago•1 comments

MiniMax M3.1-Flash-Preview

https://twitter.com/MiniMaxAgent/status/2104079819881517400
1•shenli3514•34m ago•0 comments

Alibaba Cloud Joins as a Founding Corporate Patron with $3M

https://omarchy.org/news/2026/09/alibaba-cloud-joins-as-founding-corporate-patron/
3•felixfurtak•34m ago•2 comments

Opening Up New Possibilities for "Blue" in Roses: New Findings on Copigmentation

https://www.suntory.com/sic/story/20260911
1•crescit_eundo•37m ago•0 comments

Cambrian Explosion of AI

https://debarshibasak.github.io/readables/blogs/cambrian-explosion
2•debarshri•37m ago•1 comments

OllamaMQ v0.5.0 – supports SystemOne APIs

1•chleba•46m ago•0 comments

The Truth Physics Can No Longer Ignore

https://www.theatlantic.com/science/2025/12/physics-life-reductionism-complexity/685257/
3•jdkee•47m ago•1 comments

How do I promote an anti AI slop tool I built? It's free and genuine

2•arpanghoshal•55m ago•2 comments

Turning My PS3 into a Moonlight Streaming Host, and Building with LLMs

https://kenmyers.io/posts/ps3-moonlight
3•bruhfeefee•57m ago•0 comments

Show HN: Novrl, clickable product demos from screenshots, no account needed

https://novrl.com/
1•dylan_builds•1h ago•0 comments

Thorsten Ball – What I believe about the future of software development

https://thorstenball.com/blog/2026/09/19/what-i-believe-about-the-future-of-software-development/
5•Helithumper•1h ago•2 comments

Is Life Itself a State of Matter?

https://thereader.mitpress.mit.edu/is-life-itself-a-state-of-matter/
3•pseudolus•1h ago•0 comments

Trust No Bot

https://trustnobot.com
2•kevinmannix•1h ago•1 comments

Is open source contribution still relevant?

1•cipherdc•1h ago•2 comments

How to Know When the AI Boom Is About to Go Bust

https://www.wsj.com/finance/stocks/how-to-know-when-the-ai-boom-is-about-to-go-bust-61af3d26
3•1vuio0pswjnm7•1h ago•0 comments

Show HN: DeepFace is now running on PyTorch alongside TensorFlow

https://github.com/serengil/deepface
1•serengil•1h ago•0 comments