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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!

802.1Qav – Forwarding and Queuing Enhancements for Time-Sensitive Streams

https://www.ieee802.org/1/pages/802.1av.html
1•Lwrless•37s ago•0 comments

Because Webfetch Sucks

https://github.com/bxxd/mcp-fetch-ux
1•breed101•2m ago•1 comments

The Ever-changing Art of the Screensaver (2022)

https://eyeondesign.aiga.org/the-ever-changing-art-of-the-screensaver/
1•arbesman•3m ago•0 comments

Streamable Volumetric Video Is Here on Apple Vision Pro (and It's Wild)[video]

https://www.youtube.com/watch?v=YtFEbNLb4wo
1•ndr42•4m ago•0 comments

The Sinclair ZX Spectrum White Edition

https://www.heise.de/news/The-Spectrum-White-Edition-Eine-Retro-Legende-bekommt-eine-Neuauflage-1...
1•i_don_t_know•4m ago•1 comments

Inter-Process Remote Execution: Low-latency IPC/RPC using merged address spaces

https://libriscv.no/assets/files/Emulator_remote_execution_using_merged_address_spaces-4-6ad2a2b8...
1•ingve•6m ago•0 comments

UK Biobank health data listed for sale in China, government confirms

https://www.bbc.co.uk/news/articles/cpvxgl3n138o
2•mellosouls•7m ago•0 comments

LLM as Judge: Reproducible Evaluation for LLM Systems

https://nemorize.com/roadmaps/llm-as-judge-reproducible-evaluation-for-llm-systems
1•reverseblade2•9m ago•0 comments

The Guide to Claude Opus 4.7

https://www.productcompass.pm/p/claude-opus-4-7-guide
1•Anon84•10m ago•0 comments

French weather service alerts police after suspicious Polymarket bets

https://www.ft.com/content/89be7df3-b7b8-4b4a-8b88-e24e877b439d
3•chrisaycock•11m ago•0 comments

Show HN: Token Saving Tinyscreenshot Skill

https://github.com/franzenzenhofer/tinyscreenshot
1•franze•11m ago•0 comments

AI BPR: The Day We Stopped Asking "What's Your Problem?"

https://aws.amazon.com/jp/blogs/news/ai-driven-business-process-re-engineering/
1•icoxfog417•11m ago•0 comments

What Have We Dumped on the Moon?

https://hackaday.com/2026/04/22/what-have-we-dumped-on-the-moon/
2•pkaeding•13m ago•0 comments

Show HN: Pokemon Roulette – Random Team Generator for Nuzlocke Runs

https://pokemonroulette.com
1•caoq•15m ago•0 comments

Fortran-Based Languages

https://en.wikipedia.org/wiki/Fortran
1•tosh•15m ago•0 comments

Tesla announces HW4 Plus with doubled memory – will HW4 follow HW3 to the grave?

https://electrek.co/2026/04/23/tesla-hw4-plus-upgrade-will-hw4-follow-hw3/
1•breve•15m ago•0 comments

I often think of Jef Raskin's disdain for files and folders

https://galjot.si/death-to-files-and-folders
1•sedovsek•16m ago•0 comments

Show HN: Honker – Postgres NOTIFY/LISTEN Semantics for SQLite

https://github.com/russellromney/honker
6•russellthehippo•16m ago•0 comments

All mechanical music machine making [video]

https://www.youtube.com/watch?v=zVojuK_CXJM
1•hgo•16m ago•0 comments

Blink: An AISearch Engine

https://blink-oi.vercel.app
1•Pascal1997•17m ago•0 comments

Sneaky spam in conversational replies to blog posts

https://shkspr.mobi/blog/2026/04/sneaky-spam-in-conversational-replies-to-blog-posts/
3•ColinWright•19m ago•0 comments

NativeWright – Patchright browser daemon for AI coding agents

https://github.com/lipski-lite/nativewright
1•L10N•21m ago•0 comments

Commenting and Approving Pull Requests

https://www.jakeworth.com/posts/on-commenting-and-approving-pull-requests/
2•jwworth•22m ago•0 comments

The Definitive Guide to Importing Your Cloud Resources into IaC

https://blog.cloudgeni.ai/the-definitive-guide-to-importing-your-cloud-resources-into-iac/
1•davletdz•23m ago•0 comments

Elon Musk's court battle with Sam Altman exposes Silicon Valley secrets

https://www.washingtonpost.com/technology/2026/04/23/musk-altman-lawsuit-trial-openai/
1•ot•23m ago•0 comments

Archaeologists find copy of Homer's Iliad inside ancient Egyptian mummy

https://www.independent.co.uk/news/science/archaeology/mummy-egyptian-homer-iliad-gut-b2962343.html
1•bookofjoe•24m ago•0 comments

Show HN: Building AI research memory is hard and I'm attempting it. Try it out

https://apps.apple.com/us/app/manex-hub/id6760378038?mt=12
1•krcnow•24m ago•0 comments

John Maynard Keynes saved capitalism from itself

https://www.economist.com/by-invitation/2026/04/08/john-maynard-keynes-saved-capitalism-from-itself
1•andsoitis•24m ago•0 comments

SSE token streaming is easy, they said

https://zknill.io/posts/everyone-said-sse-token-streaming-was-easy/
1•zknill•24m ago•1 comments

A live dashboard for AI agent sessions

https://github.com/jwillmer/ai-status
1•jwillmer•24m ago•0 comments