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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!

With $1 Cyberattacks on the Rise, Durable Defenses Pay Off

https://spectrum.ieee.org/ai-cyberattacks-memory-safe-code
1•rbanffy•6m ago•0 comments

Coatue has a plan to buy up land for data centers, possibly for Anthropic

https://techcrunch.com/2026/05/01/coatue-has-a-plan-to-buy-up-land-for-data-centers-possibly-for-...
1•Brajeshwar•6m ago•0 comments

The Computer Programme Episode 1, 1982 [video]

https://archive.org/details/the_computer_programme_ep01
1•petethomas•6m ago•0 comments

Voice-AI-for-Beginners – A curated learning path for developers

https://github.com/mahimairaja/voiceai
2•mahimai•12m ago•0 comments

Restorative Yoga and the Biology of Belonging

https://parrik.com/puzzles/the-partition-problem/
1•parrik•12m ago•0 comments

Facepunch launches s&box, the highly anticipated successor to Garry's Mod

https://www.gamingonlinux.com/2026/04/facepunch-launches-s-box-the-highly-anticipated-successor-t...
2•embedding-shape•14m ago•1 comments

Dynamic Traefik configuration with multiple Docker hosts

https://blog.vasi.li/automating-mantrae-traefik-management-with-mantrae-agent/
2•vsviridov•15m ago•0 comments

Grinta – Local-first coding agent, 7 months solo, open source today

https://github.com/josephsenior/Grinta-Coding-Agent
1•YoussefMejdi•15m ago•1 comments

Trump's border wall expansion just bulldozed an ancient tribal site

https://www.washingtonpost.com/climate-environment/2026/04/30/border-wall-damage-indigenous-arizona/
2•gnabgib•17m ago•0 comments

What Is GStack? Gary Tan's Open-Source Startup Framework for Claude Code

https://www.mindstudio.ai/blog/what-is-gstack-gary-tan-claude-code-framework
2•evo_9•20m ago•0 comments

The physics slop that YouTube wants me to make [video]

https://www.youtube.com/watch?v=Cd5EHfRerGI
1•surprisetalk•24m ago•0 comments

Built this for my civil engineering firm's static site on Cloudflare Pages

https://github.com/bwengr/knowledge-base-spec
1•bwengr•24m ago•0 comments

How to run a cross-cutting campaign

https://parrik.com/puzzles/the-campaign-cascade/
1•parrik•28m ago•0 comments

NovAST

https://github.com/sharkkyyy10/NovAST
2•sharkkyyy10•35m ago•0 comments

The Apprehension Engine (2022)

https://guitar.com/features/interviews/the-apprehension-engine-most-terrifying-musical-instrument/
1•turtleyacht•35m ago•1 comments

A self was never flat

https://parrik.com/puzzles/know-thyself/
1•parrik•39m ago•0 comments

Martian Glaciers with Drones

https://nautil.us/uncovering-hidden-martian-glaciers-with-drones-1280400
1•Brajeshwar•39m ago•0 comments

talkie-coder: From 1930 to SWE-bench

https://github.com/RicardoDominguez/talkie-coder
1•Philpax•39m ago•0 comments

Clojurists Together – Q2 2026 Open Source Funding Announcement

https://www.clojuriststogether.org/news/q2-2026-funding-announcement/
2•dragandj•40m ago•0 comments

Hostis Humani Generis

https://hostis.black/
2•g4k•42m ago•0 comments

Chinese Government Just Got Largest Digital Rights Conference Canceled

https://www.wired.com/story/the-chinese-government-pressured-zambia-to-cancel-the-worlds-largest-...
1•thesmtsolver2•43m ago•0 comments

Show HN: Headcam - head tracking & streaming app (iOS) [video]

https://www.youtube.com/watch?v=s8khQ_-6aM8
1•itsloopyo•45m ago•0 comments

How the vinyl revival fills the gaps streaming left behind

https://restofworld.org/2026/vinyl-revival-streaming-gaps/
3•billybuckwheat•47m ago•0 comments

Show HN: Plannotator for Codex

https://twitter.com/plannotator/status/2050683552581468172
2•ramoz•47m ago•1 comments

Show HN: State of the Art of Coding Models, According to Hacker News Commenters

https://hnup.date/hn-sota
7•yunusabd•50m ago•5 comments

Mistral Medium 3.5 YaRN bug fix

https://huggingface.co/mistralai/Mistral-Medium-3.5-128B/discussions/18
1•danielhanchen•52m ago•0 comments

Frizbee is a tool you may throw a tag at and it comes back with a checksum

https://github.com/stacklok/frizbee
1•mooreds•52m ago•0 comments

Silicon Valley's Brightest Parents Broke Their Own School

https://www.wsj.com/us-news/education/how-silicon-valleys-brightest-parents-broke-their-own-schoo...
8•sanj•53m ago•0 comments

Problem with Counterfeit People

https://www.theatlantic.com/technology/archive/2023/05/problem-counterfeit-people/674075/
2•tu7001•54m ago•0 comments

The agent harness belongs outside the sandbox

https://www.mendral.com/blog/agent-harness-belongs-outside-sandbox
15•shad42•54m ago•5 comments