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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•11mo 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!

Making RAM at Home

https://www.youtube.com/watch?v=h6GWikWlAQA
1•seitzp•2m ago•0 comments

Claude Evolve: ShinkaEvolve code evolution on only Claude Code

https://github.com/samuelzxu/claude-evolve
1•samuelzxu•3m ago•1 comments

The rich world faces a painful bout of inflation

https://economist.com/leaders/2025/10/16/the-rich-world-faces-a-painful-bout-of-inflation
1•andsoitis•5m ago•0 comments

The Onion launches new effort to turn InfoWars into parody website

https://www.bbc.co.uk/news/articles/ckgr7dw55lwo
1•piqufoh•5m ago•0 comments

Open JJ: parallel jj workspaces in VS Code, in one click

https://marketplace.visualstudio.com/items?itemName=olup.open-jj
1•olup•7m ago•0 comments

Ok, What Uses Rust?

https://blog.goose.love
1•iNic•7m ago•0 comments

Show HN: I tracked 4,200 GitHub startup orgs for 6 months – here's the watchlist

https://signals.gitdealflow.com/predicted
1•the_data_nerd•8m ago•0 comments

Haiku-ARM64-Build

https://rcarmo.github.io/projects/haiku-arm64-build.html
2•rcarmo•8m ago•0 comments

Nova Launcher could soon add proactive AI assistant that sucks up all your data

https://www.androidauthority.com/nova-launcher-ai-plus-subscription-apk-teardown-3658932/
1•croes•9m ago•0 comments

$5k bounty program from Pydantic Monty

https://hackmonty.com
1•scolvin•10m ago•0 comments

Original Task Manager creator explains why it lies to you about CPU usage

https://www.tomshardware.com/software/windows/original-task-manager-creator-explains-why-it-lies-...
2•maxloh•12m ago•0 comments

Would you use a tool that enforces consistency with real consequences?

https://proofly.migliorarecorp.com/
1•talhaahsan•13m ago•0 comments

A type-safe, realtime collaborative Graph Database in a CRDT

https://codemix.com/graph
2•phpnode•13m ago•0 comments

Labels create neural pathways that outlast their triggers

https://medium.com/@genady_awarelife/the-tool-that-shapes-what-you-can-see-f43f434fa3c2
1•genadym•13m ago•0 comments

Want to Speak to the Manager? At a New San Francisco Store, That's A.I

https://www.nytimes.com/2026/04/21/us/san-francisco-store-managed-ai-agent.html
1•reaperducer•13m ago•0 comments

The Bitter Lesson versus the Garbage Can

https://www.oneusefulthing.org/p/the-bitter-lesson-versus-the-garbage
1•theorchid•15m ago•0 comments

New post: The Markdown Link No. 23

https://md-handbook.com/blog/markdown-link-no-23/
1•wordius•16m ago•0 comments

Ukraine's Drone Innovations Are Influencing Europe's Militaries (2025)

https://smallwarsjournal.com/2025/06/11/ukraines-battlefield-drone-innovations/
1•breve•18m ago•0 comments

AgentSearch – self-hosted SearXNG API for LLM search, no keys

https://github.com/brcrusoe72/agent-search
1•bricrusoe•19m ago•0 comments

JAXA mulls launching H3 test rocket in June after last year's failure

https://english.kyodonews.net/articles/-/74617
2•01-_-•19m ago•0 comments

US Supreme Court to assess FCC power to fine in clash with wireless carriers

https://www.reuters.com/sustainability/boards-policy-regulation/us-supreme-court-assess-fcc-power...
1•01-_-•20m ago•0 comments

Study suggests eating fruits and vegetables leads to cancer

https://arstechnica.com/health/2026/04/absurdly-bad-study-spurs-headlines-linking-healthy-diet-to...
1•chha•20m ago•0 comments

What software engineer have to learn in era of LLMs

https://aleksei-kornev.medium.com/what-software-engineer-have-to-learn-in-era-of-llms-27ea70ebc7bf
1•alkornev•21m ago•0 comments

5.6x throughput on Kimi K2.6 by speculating less

https://huggingface.co/florianleibert/kimi-k26-dflash-mi300x
5•florianleibert•22m ago•1 comments

GPT Image 2 – native multimodal image generator

https://gptimg.co/
1•xbaicai•25m ago•0 comments

The Inquisition, in Beta

https://postcorporate.substack.com/p/the-inquisition-in-beta
1•gnostikka•27m ago•0 comments

Preserved for billions of years, organic compounds found on Mars

https://www.courthousenews.com/preserved-for-billions-of-years-organic-compounds-found-on-mars/
1•geox•27m ago•0 comments

TinyGo 0.41 on ESP32 – At Long Last, Wireless

https://tinygo.org/blog/2026/tinygo-0-41-the-big-release/
1•deadprogram•27m ago•0 comments

'Earthset' Is Captured on Video for First Time

https://www.nytimes.com/2026/04/20/science/reid-wiseman-earthset-photo-artemis-2.html
2•nyc111•27m ago•1 comments

In a World of Software Abundance, Focus on Distribution

https://www.hauser.io/in-a-world-of-software-abundance-focus-on-distribution/
1•bkfh•28m ago•0 comments