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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•8mo 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!

Anthropic Economic Index economic primitives

https://www.anthropic.com/research/anthropic-economic-index-january-2026-report
2•malshe•1m ago•0 comments

My answers to the questions I posed about porting open source code with LLMs

https://simonwillison.net/2026/Jan/11/answers/
1•mmarian•2m ago•0 comments

The Education of the Broligarchy

https://colossus.com/article/education-broligarchy-silicon-valley-canon/
1•pseudolus•2m ago•0 comments

Scala 3.8 Released

https://scala-lang.org/news/3.8/
1•pregnenolone•3m ago•0 comments

Terminal-Bench: Benchmarking Agents on Hard, Realistic Tasks in CLIs

https://arxiv.org/abs/2601.11868
1•matt_d•4m ago•0 comments

Show HN: NimbleBrain – We killed our agents; users now just describe workflows

https://studio.nimblebrain.ai/
1•barefootsanders•5m ago•0 comments

Service degradation on Microsoft 365 (Business or Enterprise)

https://status.cloud.microsoft/
1•tencentshill•5m ago•0 comments

OpenAI chair Bret Taylor says AI is 'probably' bubble, expects correction coming

https://www.cnbc.com/2026/01/22/openai-chair-bret-taylor-ai-bubble-correction.html
1•zerosizedweasle•7m ago•0 comments

Micron breaks ground on $100B New York DRAM megafab

https://www.theregister.com/2026/01/16/micron_fab_breaks_ground/
3•rbanffy•8m ago•0 comments

Brex is joining forces with Capital One

https://www.brex.com/journal/brex-and-capital-one-join-forces
1•ChrisArchitect•9m ago•1 comments

Setting up Home Lab T3 [video]

https://www.youtube.com/watch?v=q_kkSUH60W4
1•rwmj•11m ago•0 comments

Show HN: My Finnish language learner-friendly simple news archive

https://hiandrewquinn.github.io/selkouutiset-archive/
2•hiAndrewQuinn•11m ago•0 comments

Memory DisOrder: Memory Re-Orderings as a Timerless Side-Channel

https://arxiv.org/abs/2601.08770
1•rbanffy•11m ago•0 comments

Viking Ship Museum in Denmark announces the discovery of the largest cog

https://www.medievalists.net/2025/12/medieval-ship-discovered-copenhagen/
1•PaulHoule•12m ago•0 comments

Show HN: SONA – An AI-native serialization format to reduce "Syntax Tax"

https://github.com/fabiosleal/sona-structured-object-notation-architecture
1•fabio2620•13m ago•0 comments

"Ptolemaic Code": software that appears functional but is based on a fundame

https://tldr.nettime.org/@dk/115883067614348534
1•fanf2•13m ago•0 comments

Show HN: Free depreciation schedule generator for small businesses

https://whatsmydepreciation.co/
3•d_shar_•13m ago•1 comments

My Comments Run on Email

https://ckardaris.github.io/blog/2026/01/22/my-comments-run-on-email.html
1•ckardaris•14m ago•0 comments

The Evolution of Google Search (1997–Present)

https://www.google.com/search/howsearchworks/our-history/
1•blancotech•14m ago•1 comments

(uLisp) Assembler and Defcode

http://www.ulisp.com/show?2Z88
1•dleslie•17m ago•1 comments

Ask HN: Any good ressources facility location planning using GIS?

1•skalilopa•18m ago•0 comments

Capital One to Acquire Brex

https://investor.capitalone.com/news-releases/news-release-details/capital-one-acquire-brex/
6•a13n•19m ago•2 comments

Show HN: Pay to Push the Political Mood

https://politics-vibe.vercel.app/
1•smakosh•20m ago•0 comments

CapitalOne buys Brex (YC W17) for $5.15B

https://www.cnbc.com/2026/01/22/capital-one-is-buying-startup-brex-for-5point15-billion-in-credit...
2•wdaher•20m ago•1 comments

Extracting a UART Password via SPI Flash Instruction Tracing

https://zuernerd.github.io/blog/2026/01/07/switch-password.html
3•Eduard•23m ago•0 comments

Show HN: I built a sandboxed VM for letting AI agents go wild without risks

3•pancakeInDev•26m ago•0 comments

Show HN: ATS-1.0 – A 6-Tier Technical Standard for AI Authorship Disclosure

https://github.com/MeaningfulnessMediaGroup/ATS-Framework
1•djeffbee•26m ago•1 comments

Reflecting on two years as an open-source startup

https://hatchet.run/blog/two-years-open-source
1•abelanger•27m ago•0 comments

How to Solve Santa Claus Concurrency Puzzle with a Model Checker

https://wyounas.github.io/puzzles/concurrency/2026/01/10/how-to-help-santa-claus-concurrently/
2•speckx•27m ago•0 comments

Show HN: FOMOmeter – crypto sentiment based on crowd emotions, not price

https://www.fomometer.ai
7•Utss•29m ago•0 comments