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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!

SafeRE: Building a production-quality regex library with agents

https://eaftan.github.io/safere-intro/
1•eaftan•3m ago•0 comments

Your brain was never designed for this much bad news

https://www.sciencedaily.com/releases/2026/06/260614012006.htm
1•colinprince•3m ago•0 comments

Diagram of Distribution Relationships

https://www.johndcook.com/blog/distribution_chart/
1•nextos•3m ago•0 comments

The New Software Lifecycle

https://addyosmani.com/blog/new-sdlc-vibe-coding/
1•saikatsg•6m ago•0 comments

Armstrong Effect

https://en.wikipedia.org/wiki/Armstrong_effect
1•userbinator•10m ago•0 comments

Greece unveils restored Parthenon facade unseen in full for 2 centuries

https://apnews.com/article/greece-acropolis-restoration-parthenon-tourism-da06640fcd747498613d31b...
2•gmays•13m ago•0 comments

Second Brain – A free, invisible AI interview copilot (Groq and Llama 3)

https://github.com/hi2brain/second-brain
2•hi2brain•17m ago•0 comments

Modeling Mersenne's Clavichord

https://masonm.org/posts/meresennes-clavichord/
1•anonydsfsfs•19m ago•0 comments

Ask HN: Is Claude Code with Fable 5 worth switching back from Codex?

3•vantareed•20m ago•1 comments

Palmier-Pro: macOS video editor built for AI

https://github.com/palmier-io/palmier-pro
5•vantareed•26m ago•1 comments

Secretive Wall Street Powerhouse Jane Street Seizes the AI Spotlight

https://www.wsj.com/tech/ai/jane-street-ai-wall-street-bdfcc81a
2•kjhughes•27m ago•0 comments

I guess I should have become a Plumber

https://www.robot-future.com/preview/6a3758e002c7a770662f8346
1•robot-future•32m ago•0 comments

Train LLM from Scratch

https://FareedKhan-dev.github.io/train-llm-from-scratch/
1•vinhnx•35m ago•0 comments

Build your project Zig-style

https://fnordig.de/2026/06/16/build-your-project-zig-style/
1•vinhnx•36m ago•0 comments

Rust Prevents Data Races, Not Race Conditions

https://corrode.dev/blog/rust-prevents-data-races-not-race-conditions/
2•vinhnx•38m ago•0 comments

Trump says multiple people arrested for allegedly vandalizing Reflecting Pool

https://www.cbsnews.com/news/trump-reflecting-pool-vandalism-arrest-washington-dc/
2•rolph•41m ago•0 comments

SOCKMAP - TCP splicing of the future

https://blog.cloudflare.com/sockmap-tcp-splicing-of-the-future/
1•zdw•57m ago•0 comments

Early life adversity leaves a lasting molecular imprint across the body

https://medicalxpress.com/news/2026-06-early-life-adversity-molecular-imprint.html
4•gmays•1h ago•0 comments

Show HN: Agent-historian – let your AI agent search its own past sessions

https://github.com/adlternative/agent-historian
1•adltereturn•1h ago•0 comments

Static universe with VSL. Redshift without expansion (open access)

https://pixeltheory.co.uk
1•jimfoweraker•1h ago•0 comments

Moving Machine Learning into the Analog Domain

https://sangota.substack.com/p/one-good-analog-transistor-is-worth
2•random__duck•1h ago•0 comments

I Moved from Arch to Boring Debian Testing

https://www.whileforloop.com/blog/2026/06/20/why-i-moved-from-arch-to-debian-testing/
2•wook__•1h ago•0 comments

Corpulence Index

https://en.wikipedia.org/wiki/Corpulence_index
2•aragonite•1h ago•0 comments

The largest open database of local laws in the US

https://arxiv.org/abs/2606.19334
1•rao-v•1h ago•1 comments

Some of Android's Most Interesting Games Aren't Just on the Play Store

https://gardinerbryant.com/some-of-androids-most-interesting-games/
1•thunderbong•1h ago•0 comments

I Hate Personal CRMs. I Might Need One

https://shikharsachdev.substack.com/p/i-hate-personal-crms-i-might-need
1•shsachdev•1h ago•0 comments

X402 stock APIs for agents, pay per API call

https://x402stock.xyz/
1•parth_nandaniya•1h ago•0 comments

Bevy 0.19

https://bevy.org/news/bevy-0-19/
3•embedding-shape•1h ago•0 comments

Realtime Raytracing in Bevy 0.19 (Solari)

https://jms55.github.io/posts/2026-04-12-solari-bevy-0-19/
2•embedding-shape•1h ago•0 comments

Third Places (NYC)

https://thirdplaces.nyc
2•xhrpost•1h ago•1 comments