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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!

Pg_plan_advice: Plan Stability and User Planner Control for PostgreSQL?

http://rhaas.blogspot.com/2026/03/pgplanadvice-plan-stability-and-user.html
1•ksec•31s ago•0 comments

Anbernic RG Rotate handheld game console coming soon for $88 and up

https://liliputing.com/anbernic-rg-rotate-handheld-game-console-with-flip-out-display-coming-soon...
1•PaulHoule•55s ago•0 comments

FlashMemory-DeepSeek-V4

https://arxiv.org/abs/2606.09079
1•GaggiX•1m ago•0 comments

Most "Chat with Your Data" Products Will Fail

https://medium.com/codex/most-chat-with-your-data-products-will-fail-5956f1aff212
1•theanonymousone•1m ago•0 comments

ChiWhoBike Interview #93

https://chiwho.bike/interviews/93
1•mooreds•2m ago•0 comments

Kaku: A fast, out-of-the-box macOS terminal built for AI coding

https://kaku.fun/
1•emschwartz•2m ago•0 comments

AI won't replace your mentor, but it might be the only one available

https://irowell.io/blog/AI_won%27t_replace_your_mentor,_but_it_might_be_the_only_one_available
1•irowell•3m ago•0 comments

Show HN: Gravity – interactive solar-system simulator, from Newton to Einstein

https://qunabu.github.io/Gravity/
1•qunabu•3m ago•0 comments

Canada to ban social media for kids under 16

https://cultmtl.com/2026/06/canada-to-ban-social-media-for-kids-under-16/
1•mooreds•3m ago•0 comments

Performance Improvements in JDK 26

https://inside.java/2026/06/09/jdk-26-performance-improvements/
1•rowbin•3m ago•0 comments

AI and Identity Survey Findings

https://fusionauth.io/blog/2026-ai-identity-report
1•mooreds•4m ago•0 comments

Apple Outlines AI and Developer Tool Updates at Platforms State of the Union

https://www.macrumors.com/2026/06/09/apple-outlines-major-ai-and-developer-tool-updates/
1•ksec•4m ago•0 comments

Jaydebeapiarrow – A high-performance JDBC bridge for Python

https://github.com/HenryNebula/jaydebeapiarrow
1•HenryNebula•6m ago•0 comments

A living journal of your pet's life that happens to be smart

https://tamadoggo.com
1•sorinvasiliu•8m ago•0 comments

I Saw the Future of Windows at Microsoft Build, and It's Unrecognizable

https://www.pcmag.com/opinions/i-saw-the-future-of-windows-at-microsoft-build-2026-and-its-unreco...
2•redbell•12m ago•0 comments

'Picks and shovels' companies profit from data centre scramble

https://www.ft.com/content/5ede9d4d-3989-49b5-a282-4722c8d8fc59
1•1vuio0pswjnm7•14m ago•0 comments

Kan Extensions in Haskell

https://bartoszmilewski.com/2026/06/08/kan-extensions-in-haskell/
1•ibobev•15m ago•0 comments

SmithDB

https://buttondown.com/jaffray/archive/smithdb/
1•ibobev•16m ago•0 comments

Siri AI? I'll believe it when I see it

https://www.macworld.com/article/3158943/siri-ai-ill-believe-it-when-i-see-it.html
1•thm•16m ago•0 comments

A cute little trick to running classic IIR filters on the GPU

https://themaister.net/blog/2026/06/08/a-cute-little-trick-to-running-classic-iir-filters-on-the-...
2•ibobev•16m ago•0 comments

Rust goal: cargo script (like uv does for Python)

https://rust-lang.github.io/rfcs/3935-Project-Goals-2026.html#running-rust-scripts-will-get-more-...
1•IdiotSavage•16m ago•1 comments

Visual Information Theory

https://colah.github.io/posts/2015-09-Visual-Information/
2•montyanderson•17m ago•0 comments

Virtual OS Museum lets you relive over 600 operating systems on your desktop

https://www.theverge.com/tech/945246/virtual-os-museum-dos-windows-mac-os
1•thunderbong•18m ago•0 comments

Show HN: Trusthook – verify webhook signatures for 18 Go providers in one call

https://github.com/eben-vranken/trusthook
1•eben-vranken•18m ago•0 comments

CSS: Unavoidable Bad Parts

https://matklad.github.io/2026/06/04/css-unavoidable-bad-parts.html
2•surprisetalk•19m ago•0 comments

What Yahoo killed when it bought Maktoob

https://lr0.org/blog/p/yahoo/
1•lr0•21m ago•0 comments

Test-case reducers are underappreciated debugging tools

https://tratt.net/laurie/blog/2026/test_case_reducers_are_underappreciated_debugging_tools.html
1•ltratt•22m ago•0 comments

Model routing is a fix for AI overspending, a problem for OpenAI and Anthropic

https://www.cnbc.com/2026/06/05/model-routing-on-ai-is-a-problem-for-openai-and-anthropic.html
2•1vuio0pswjnm7•23m ago•0 comments

Node-RED Version 5.0 released

https://nodered.org/blog/2026/06/09/version-5-0-released
2•beardicus•26m ago•0 comments

Ask HN: Do you install other people agent skills?

1•sermakarevich•26m ago•0 comments