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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•8mo 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!

Nw_wrld is an event-driven sequencer for triggering visuals [video]

https://www.youtube.com/watch?v=6vM_b54pWtg
1•_josh_meyer_•50s ago•1 comments

Agent Skills That Work

https://agentskills.work/sellers-net-sheet-florida
1•zlonmask•1m ago•1 comments

AI Blog

https://ai-blog-peach.vercel.app
1•dagmawibabi•4m ago•1 comments

Tell HN: AI could bring back GraphQL from the brink

1•sergiotapia•4m ago•0 comments

Tjs: Fastest and most accurate JSON-schema validator

https://github.com/sberan/tjs
1•handfuloflight•4m ago•0 comments

Chinese military says it is developing over 10 quantum warfare weapons

https://www.scmp.com/news/china/science/article/3339907/chinese-military-says-it-developing-over-...
2•KnuthIsGod•4m ago•0 comments

Show HN: Flashlight: Android app that lets you control torch brightness

https://github.com/rtvkiz/Flashlight
1•ritvikarya98•6m ago•0 comments

Appliances, Factories and the Grid

https://mercurialsolo.substack.com/p/appliances-factories-grids
1•mercurialsolo•7m ago•1 comments

Microsoft-Activision deal was meant to help The Embracer Grou

https://www.gamefile.news/p/bobby-kotick-activision-microsoft-ap7-lawsuit-embracer-group
1•firesteelrain•7m ago•0 comments

Tract: Self-contained, TensorFlow and ONNX inference

https://github.com/sonos/tract
1•vishnukvmd•8m ago•0 comments

Rampsliding Is a Quake Engine Quirk in the Same Way That Bunnyhopping Is

https://www.ryanliptak.com/blog/rampsliding-quake-engine-quirk/
1•luu•9m ago•0 comments

Scientists Discover Form of Water That's Both Solid and Liquid

https://studyfinds.org/scientists-discover-bizarre-water-both-solid-liquid/
1•adwmayer•9m ago•0 comments

Oracle to PostgreSQL DDL: Data Types, Partitions and More

https://www.datacloudgaze.com/post/oracle-postgresql-ddl-migration-guide
1•mahtodeepak•10m ago•0 comments

Airbnb Taps Meta AI Executive as New Chief Technology Officer

https://www.bloomberg.com/news/articles/2026-01-14/airbnb-taps-meta-ai-executive-as-new-chief-tec...
1•doppp•12m ago•0 comments

Free AI-Powered Tools

https://figtalia.com/
1•sifuncion•15m ago•0 comments

The Mythology of Conscious AI

https://www.noemamag.com/the-mythology-of-conscious-ai/
2•hardmaru•17m ago•0 comments

The Sword Blade Bank

https://tontinecoffeehouse.com/2020/09/28/the-sword-blade-bank/
2•dmonay•20m ago•0 comments

Short Supply: Root Causes of Declining Propensity for US Military Service

https://www.cnas.org/publications/reports/short-supply
1•toomuchtodo•24m ago•1 comments

OpenAI acquires health-care technology startup Torch

https://www.cnbc.com/2026/01/12/open-ai-torch-health-care-technology.html
1•gmays•25m ago•0 comments

AI Voice Elements

https://vercel.com/changelog/ai-voice-elements
2•handfuloflight•29m ago•1 comments

Rickroll in Rustc

https://github.com/rust-lang/rust/blob/main/tests/ui/attributes/check-cfg_attr-ice.rs
1•todsacerdoti•30m ago•0 comments

Failed part on UPS plane that crashed in KY failed 4x on other planes previously

https://apnews.com/article/ups-louisville-plane-crash-ntsb-md11-6d4cfff0c3937f847a3ac39809e31c11
3•toomuchtodo•34m ago•1 comments

China's customs agents told Nvidia's H200 chips are not permitted, sources say

https://www.reuters.com/world/china/chinas-customs-agents-told-nvidias-h200-chips-are-not-permitt...
2•donohoe•37m ago•0 comments

How to Ask Questions the Smart Way

http://www.catb.org/esr/faqs/smart-questions.html
1•thunderbong•38m ago•0 comments

Immigration agents shoot man in Minneapolis as tensions in city run high

https://www.theguardian.com/us-news/2026/jan/14/minnesota-immigration-officers-shovel-attack
3•SilverElfin•38m ago•1 comments

Battery is about to change the world in 3 months, or make this guy a fool

https://electrek.co/2026/01/14/batter-about-change-world-or-make-this-guy-fool/
3•topher515•39m ago•1 comments

With this tool, you can enjoy NAS functionality even without a NAS

https://quicksend.chat/
2•foodhome•39m ago•0 comments

String Theory Can Now Describe a Universe That Has Dark Energy

https://www.quantamagazine.org/string-theory-can-now-describe-a-universe-that-has-dark-energy-202...
1•jnord•40m ago•0 comments

DeepSeek Founder Liang's Funds Surge 57% as China Quants Boom

https://www.bloomberg.com/news/articles/2026-01-12/deepseek-founder-liang-s-funds-surge-57-as-chi...
1•gmays•44m ago•0 comments

Thesys: Generative UI Framework

https://www.thesys.dev
1•handfuloflight•44m ago•0 comments