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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•6mo 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!

Same Product, Same Store, but on Instacart, Prices Might Differ

https://www.nytimes.com/2025/12/09/business/instacart-algorithmic-pricing.html
1•subhero•1m ago•1 comments

RealGen: Photorealistic Text-to-Image Generation via Detector-Guided Rewards

https://yejy53.github.io/RealGen/
1•doener•2m ago•0 comments

Did Hitler really Have a 'Micropenis'?

https://www.theguardian.com/tv-and-radio/2025/nov/13/did-hitler-really-have-a-micropenis-hitlers-...
1•wjSgoWPm5bWAhXB•2m ago•0 comments

Show HN: Iceberg-JS, a TypeScript Client for the Apache Iceberg REST Catalog

https://github.com/supabase/iceberg-js
1•kiwicopple•5m ago•0 comments

Learning a new programming language with an LLM

https://feeding.cloud.geek.nz/posts/learning-new-programming-language-with-ai/
1•speckx•5m ago•0 comments

SSE sucks for transporting LLM tokens

https://zknill.io/posts/sse-sucks-for-transporting-llm-tokens/
1•zknill•6m ago•0 comments

Hyper-Scalers Are Using CXL to Lower the Impact of DDR5 Supply Constraints

https://www.servethehome.com/hyper-scalers-are-using-cxl-to-lower-the-impact-of-ddr5-supply-const...
1•giuliomagnifico•6m ago•0 comments

Creativity and Mental Health

https://en.wikipedia.org/wiki/Creativity_and_mental_health
1•wseqyrku•6m ago•0 comments

The Rise of the 0.1x Engineer

https://www.jerpint.io/blog/2025-12-08-01x-engineer/
2•jerpint•7m ago•0 comments

A new way to trigger responses in the body by simulating psychological pressure

https://medicalxpress.com/news/2025-11-streak-trigger-responses-body-simulating.html
1•PaulHoule•8m ago•0 comments

Evidence That Humans Now Speak in a Chatbot-Influenced Dialect Getting Stronger

https://gizmodo.com/chatbot-dialect-2000696509
1•pseudolus•8m ago•0 comments

Show HN: Avatune – SSR-friendly avatars with browser ML for attribute prediction

https://www.avatune.dev/
2•teimurjan•10m ago•0 comments

DeepMath: A lightweight math reasoning Agent with smolagents

https://huggingface.co/blog/intel-deepmath
3•ibobev•10m ago•0 comments

Advent of Code in Dialog

https://entropicthoughts.com/advent-of-code-in-dialog
2•ibobev•10m ago•0 comments

Multibase CLI

http://www.chriswarbo.net/blog/2025-12-07-multibase_cli.html
1•ibobev•11m ago•0 comments

Offline cybersecurity AI using RAG and local LLM (Python, FAISS, Llama 3.1)

https://gitlab.com/sydsec1/Syd
1•todsacerdoti•11m ago•0 comments

AWS re:Invent re:Watch tool

https://myrewatch.link/
2•cebert•13m ago•0 comments

All the Places

https://alltheplaces.xyz/
2•djoldman•14m ago•0 comments

Atomic time source failure at NIST Gaithersburg campus

https://groups.google.com/a/list.nist.gov/g/internet-time-service/c/Zd7VaR-vqV4
2•ahlCVA•15m ago•0 comments

Which Roadmap Path Are You On?

https://holenventures.substack.com/p/which-roadmap-path-are-you-on
1•hholen•17m ago•0 comments

My App Will Harm You Physically, Using Math

https://prolost.com/blog/drinkingbuddy
1•ingve•17m ago•0 comments

Show HN: I built a dual-engine diagram app to fix my own workflow

https://diagram-generator.com/
1•dongjiewu•19m ago•0 comments

Spending too much time on one AoC problem

https://richclubb.github.io/blog/spending_way_too_much_time/
1•jamesbelchamber•20m ago•0 comments

60 Years of Artificial Intelligence at Stanford (2023) [video]

https://www.youtube.com/watch?v=Cn6nmWlu1EA
1•swatson741•25m ago•0 comments

Torture Techniques from CIA Black Sites Were Used at Alligator Alcatraz

https://www.forever-wars.com/torture-techniques-from-cia-black-sites-were-used-at-alligator-alcat...
13•perihelions•26m ago•0 comments

The AI bust scenario that no one is talking about

https://www.noahpinion.blog/p/the-ai-bust-scenario-that-no-one
2•maelito•27m ago•0 comments

Show HN: I Built an Plug and Play UI Library with Motion Animations

https://ogblocks.dev/
2•Karanzk•29m ago•0 comments

Join the on-call roster, it'll change your life

https://serce.me/posts/2025-12-09-join-oncall-it-will-change-your-life
2•todsacerdoti•33m ago•0 comments

Pydantic-AI Deepagents

https://github.com/vstorm-co/pydantic-deep
3•kacper-vstorm•33m ago•1 comments

Trump ban on wind power projects overturned by federal judge

https://www.cnbc.com/2025/12/08/trump-ban-on-wind-power-projects-overturned-by-federal-judge.html
5•pseudolus•33m ago•1 comments