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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!

Exposing the Solid State Donut Battery. It's over [video]

https://www.youtube.com/watch?v=j5oyVNjrUPI
1•ot•51s ago•0 comments

Ads in New York must now label AI-generated 'synthetic performers'

https://apnews.com/article/new-york-ai-law-hochul-synthetic-performers-e433625bfb61c8abeab0d61986...
1•1659447091•5m ago•0 comments

An entrance animation stranded my dashboard on a black screen

https://stengineer.dev/lab/walking-into-hour-four
1•lookingforsome•5m ago•0 comments

OpenAI C2PA Policy

https://help.openai.com/en/articles/8912793-c2pa-and-synthid-in-openai-generated-images
2•sarkarghya•6m ago•0 comments

Building Hollywood Motion Capture from Scratch [video]

https://www.youtube.com/watch?v=kYVqL_DqBis
2•radeeyate•6m ago•0 comments

Nontrailing separators do not spark joy

https://buttondown.com/hillelwayne/archive/nontrailing-separators-do-not-spark-joy/
2•birdculture•7m ago•0 comments

702 Ultimatum: Warrant Requirement or Bust

https://www.eff.org/deeplinks/2026/06/702-ultimatum-warrant-requirement-or-bust
2•kevinwang•9m ago•0 comments

Loop-Harness

https://github.com/lSAAGl/loop-harness
2•LordIsBack•13m ago•0 comments

Show HN: Obsidian Image Upload Toolkit – upload images to 10 cloud providers

https://github.com/addozhang/obsidian-image-upload-toolkit
2•addozhang•16m ago•0 comments

Recovering attention during heavy study efforts

https://socketstudy.com/sparks/recovering-attention/
2•wingrove•21m ago•0 comments

Nexus Q Revival

https://mikevoyt.github.io/nexusq-revival/
2•tmp10423288442•22m ago•0 comments

Closing the Loop: One Impressive AI Coding Agent Session for Y-Combinator

https://vmysla.substack.com/p/closing-the-loop-one-impressive-ai
2•vmysla•23m ago•0 comments

A smarter approach to designing metamaterials

https://engineering.berkeley.edu/news/2025/07/a-smarter-approach-to-designing-metamaterials/
3•airstrike•24m ago•0 comments

Beneath The Enshittification, Something Amazing Is Growing

https://www.techdirt.com/2026/06/10/beneath-the-enshittification-something-amazing-is-growing/
4•hn_acker•24m ago•0 comments

Unix GC Remastered

https://mohandacherir.github.io/Qdiv7/posts/unix_new_gc/
2•mananaysiempre•26m ago•0 comments

LaserWriter Seeds

https://inventingthefuture.ghost.io/laserwriter-seeds/
3•frizlab•27m ago•0 comments

A Way to Challenge the Groupthink of Scholarly Journals

https://www.wsj.com/opinion/a-way-to-challenge-the-groupthink-of-scholarly-journals-8e59b215
2•noworld•34m ago•1 comments

Plinko Input – type a code by dropping balls

https://plinkoinput.com/
2•felixguilherme•43m ago•0 comments

The theory taking the rich by storm: China funds data center haters

https://text.npr.org/nx-s1-5844328
5•1659447091•46m ago•0 comments

Show HN: I let an AI C-suite run my company – starter kit from the inside

https://thepromptnova.gumroad.com/l/bfixc
3•clarezoe•47m ago•0 comments

Show HN: Llmbuffer – Python library for cache-optimized LLM conversation history

https://github.com/scottpurdy/llmbuffer
4•scottmp10•49m ago•0 comments

Show HN: Vatnode – EU VAT validation REST API with national registry fallback

https://vatnode.dev
4•rogulia•49m ago•0 comments

/dmg – a Claude Code skill for persistent memory and session sync

https://github.com/responsiblparty/claude-dmg-skill
4•responsiblparty•50m ago•1 comments

Nuts – pip/NPM for Java with first-class workspaces and JDK provisioning (9y+)

https://github.com/thevpc/nuts
3•thevpc•51m ago•0 comments

Show HN: Magenta Real-Time Music Generation on iPhone, Without the GPU

https://github.com/mattmireles/magenta-realtime-2-iphone
6•MediaSquirrel•52m ago•0 comments

Australia's Social Media Ban Is Floundering. Can It Still Help Younger Kids?

https://www.nytimes.com/2026/06/10/world/australia/australia-social-media-ban-under-16.html
4•uxhacker•56m ago•0 comments

Propel: Breaking the Solver Bottleneck in Task-Generator RL

https://vmax.ai/team/propel
3•AMavorParker•56m ago•0 comments

Widespread attacks on Iran have begun [video][50 mins]

https://www.youtube.com/watch?v=2KIzXrtKlbg
5•Bender•57m ago•3 comments

Patch for critical vulnerability in p2pool (Monero) to be released on 2026-06-13

https://github.com/SChernykh/p2pool/releases/tag/pre-release-v4.16
3•sxde•59m ago•1 comments

Did a Chatbot Write a Prize-Winning Story? Does It Matter?

https://www.newyorker.com/books/page-turner/did-a-chatbot-write-a-prize-winning-story-does-it-matter
5•petethomas•1h ago•0 comments