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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!

Quaternion small language-model comparison

https://github.com/ibackstrom/QuartAI
1•ibackstrom•1m ago•0 comments

The Fake Architecture of the Film World (2018)

https://www.ferrovial.com/blog/en/2018/03/the-fake-architecture-of-the-film-world/
1•andsoitis•4m ago•0 comments

RISC-V Is Inevitable: State of the Union Keynote Argues

https://www.eetimes.com/risc-v-is-inevitable-state-of-the-union-keynote-argues/
2•signa11•8m ago•0 comments

The Prompt-Wait-Evaluate Loop: How AI Kills Flow Without You Noticing

https://www.sandordargo.com/blog/2026/07/15/how-ai-kills-flow
2•jandeboevrie•9m ago•0 comments

Growth and Trend: A Simple, Powerful Technique for Timing the Stock Market (2016)

https://www.philosophicaleconomics.com/2016/01/gtt/
1•rzk•11m ago•0 comments

The Tower of Babylon

https://tobilehman.com/archive/tobilehman.com/posts/topological-fiction/index.html
1•andsoitis•13m ago•0 comments

Anamnesis: Project Hydra

https://manazir.dev/blog/anamnesis
2•mnzralee•13m ago•0 comments

AI has helped resolve an important question about BH correction in statistics

https://twitter.com/EdgarDobriban/status/2077082912021786660
1•kkoncevicius•13m ago•0 comments

Show HN: I counted India's 4M registered companies – most aren't active

https://civicdataforge.pages.dev/india-company-data
1•Chungus1172•15m ago•0 comments

The GUTS Stack

https://exe.dev/docs/guts
2•tosh•16m ago•0 comments

Free Voice Cloning in Browser

https://pocketweb.tools/voice-cloning
1•shafkathullah•17m ago•0 comments

Some flat washers are flatter than others (amateur metrology)

https://www.youtube.com/watch?v=L-2Bc5clZy0
1•briandon•18m ago•2 comments

The Single Greatest Predictor of Future Stock Market Returns (2013)

https://www.philosophicaleconomics.com/2013/12/the-single-greatest-predictor-of-future-stock-mark...
1•rzk•18m ago•1 comments

The missing private GitHub search

https://ykdojo.github.io/claude-code-tips/content/the-missing-private-github-search.html
1•ykev•23m ago•0 comments

Monid: Connect Agents to 1500 Tools

https://monid.ai/
1•handfuloflight•23m ago•0 comments

ASML First High-Volume High NA EUV Logic Product at Intel

https://www.asml.com/en/news/press-releases/2026/high-na-euv-reaches-new-readiness-milestone
1•felipevb•32m ago•0 comments

ASML reports -above guidance- €9.3B net sales and €2.9B net income in Q226

https://www.asml.com/en/news/press-releases/2026/q2-2026-financial-results
2•felipevb•34m ago•0 comments

One Name at a Time: How Die Zeit Built a Searchable DB of Nazi Party Members

https://gijn.org/stories/how-die-zeit-built-database-nazi-party-members/
1•giuliomagnifico•35m ago•0 comments

Ask HN: What are the biggest pain points you have with fine tuning models?

1•rishabhpoddar•38m ago•0 comments

CLI tool for reviewing Markdown files with inline comments

https://github.com/Seiraiyu/md-review-plus
2•ankitg12•41m ago•0 comments

Meta Sued for Allegedly Using Discriminatory AI in Layoff Decisions

https://gizmodo.com/meta-sued-for-allegedly-using-discriminatory-ai-in-layoff-decisions-2000785427
3•intunderflow•42m ago•1 comments

Project Links Two H200 Clusters 83km Away into One 111Tbps/0.9ms Supercluster

https://www.storagereview.com/news/whitefibers-project-redwood-links-two-h200-clusters-into-one-1...
2•giuliomagnifico•45m ago•0 comments

Vorfluxai: The Autopilot for Software Engineering

https://twitter.com/myprasanna/status/2077069901546852688
2•vismit2000•51m ago•0 comments

Skills That Don't Exist: A Large-Scale Study of Hallucinated Skill

https://arxiv.org/abs/2607.12340
1•sbulaev•52m ago•0 comments

Protect VPNs

https://www.openrightsgroup.org/publications/joint-letter-protect-vpns/
3•50kIters•56m ago•0 comments

Developing an Intuitive Sense of Scale

https://magworld.pw
2•vismit2000•56m ago•0 comments

Your RSS Reader Is Robbing You

https://antoniosantos.io/your-rss-reader-is-robbing-you/
1•DavideNL•57m ago•0 comments

Nearly 10k EVs Were Tested for Battery Degradation. These 2 Models Won Out

https://insideevs.com/news/801624/sweden-batter-degradation-group-test/
2•tzs•58m ago•0 comments

You only need the frontier model for one single edit

https://stencil.so/blog/prewalk
1•jxmorris12•1h ago•0 comments

XBill!

http://www.xbill.org
1•audreyfei•1h ago•0 comments