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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•10mo 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!

JPMorgan, Goldman offer hedge funds way to short private credit

https://www.msn.com/en-us/money/investment/jpmorgan-goldman-offer-hedge-funds-way-to-short-privat...
1•JumpCrisscross•1m ago•0 comments

An AI FAQ for Ordinary People

https://www.theblackboard.org/p/an-ai-faq-for-ordinary-people
1•pneumic•1m ago•0 comments

GlassWorm malware hits 400 code repos on GitHub, NPM, VSCode, OpenVSX

https://www.bleepingcomputer.com/news/security/glassworm-malware-hits-400-plus-code-repos-on-gith...
1•djinn•5m ago•0 comments

Signal's Creator [Moxie Marlinspike] Is Helping Encrypt Meta AI

https://www.wired.com/story/signals-creator-is-helping-encrypt-meta-ai/
1•toomuchtodo•5m ago•1 comments

A Bilingual Localization for Pillars of Eternity (EN and ZH)

https://blog.cerrorism.com/blog/2026-03-19
1•cerrorism•9m ago•0 comments

The internet ruined customer service. AI could save it

https://a16z.com/the-internet-ruined-customer-service-ai-could-save-it/
1•gmays•10m ago•0 comments

Super Micro Co-Founder Charged in Plot to Send AI Tech to China

https://www.bloomberg.com/news/articles/2026-03-19/three-charged-by-us-with-plot-to-illegally-sen...
2•amrrs•14m ago•1 comments

US Tech Execs charged with smuggling Nvidia chips to China

https://www.cnbc.com/2026/03/19/us-tech-execs-smuggled-nvidia-chips-to-china-prosecutors-say.html
4•randycupertino•16m ago•1 comments

How to Make Sense of AI

https://commoncog.com/how-to-make-sense-of-ai/
1•gmays•20m ago•0 comments

Pentagon Seeks $200B to Fund Iran War

https://www.nytimes.com/2026/03/19/world/middleeast/pentagon-200-billion-iran-war-funding-hegseth...
4•mizzao•20m ago•1 comments

Apache CMS Retrospective

https://iconoclasts.blog/joe/apache-cms
1•joesuf4•22m ago•0 comments

Google Working on Native Gemini AI App for Mac

https://www.macrumors.com/2026/03/19/google-native-gemini-mac-app/
1•Sir_Twist•23m ago•0 comments

In Mexico, Bread Is the Heart of Daily Life

https://cooking.nytimes.com/article/mexico-bread
1•bookofjoe•25m ago•1 comments

Show HN: ContextD – OCRs your screen activity, use it with LLMs via local API

https://github.com/thesophiaxu/contextd
1•thesophiaxu•27m ago•1 comments

Free daily-updated US tariff data in JSON,Section301,active exclusions

https://github.com/dutybirdio/us-tariff-data
2•dutybird•28m ago•1 comments

Ask HN: Can we make up/downvotes/flags visible on Hacker News Archives (delayed)

2•gpt5•33m ago•0 comments

Drugwars for the TI-82/83/83 Calculators

https://gist.github.com/mattmanning/1002653/b7a1e88479a10eaae3bd5298b8b2c86e16fb4404
2•robotnikman•34m ago•0 comments

Claude Code: Channels

https://code.claude.com/docs/en/channels
60•jasonjmcghee•38m ago•18 comments

A cheetah coat, a failed startup and lessons learned

https://ashleycwoods.substack.com/p/a-cheetah-coat-a-failed-startup-and
1•rmason•39m ago•1 comments

Show HN: CRT Retro Effect on any website

https://chromewebstore.google.com/detail/crt-retro-effect/ocgalokkpfhiiibikhlagdjjgkkclped
2•maaydin•41m ago•2 comments

The Cult of Costco

https://www.theatlantic.com/newsletters/2025/12/costco-is-an-american-achievement/685411/
7•ViktorRay•43m ago•1 comments

What to Know About the Push to Display the Ten Commandments in Classes

https://www.nytimes.com/2026/03/19/us/ten-commandments-schools-states.html
3•JumpCrisscross•45m ago•0 comments

Prism MCP – Session Memory and 94% Context Reduction for AI Agents

https://github.com/dcostenco/prism-mcp
2•dcostenco•46m ago•0 comments

OpenAI Plans Launch of Desktop 'Superapp' to Refocus, Simplify User Experience

https://www.wsj.com/tech/openai-plans-launch-of-desktop-superapp-to-refocus-simplify-user-experie...
2•JumpCrisscross•47m ago•1 comments

Cool Claude Code Proficiency Badge

https://github.com/Z-M-Huang/cc-proficiency
2•zh_code•50m ago•0 comments

How are Iranian drones getting their guidance?

3•dottenad•51m ago•2 comments

I Had Too Many Issues Using OpenClaw, So I Made My Own Agent

https://zarkones.itch.io/justabot
1•ZARKONES•52m ago•2 comments

Tesla Has Its First Semi-Truck and It's a Hit with Truckers

https://www.wsj.com/business/logistics/truckers-tesla-fans-semi-b0a66e6e
2•JumpCrisscross•54m ago•0 comments

The Odds of Me Being Mauled by a Bear This Weekend Keep Going Up on Kalshi

https://www.mcsweeneys.net/articles/the-odds-of-me-being-mauled-by-a-bear-this-weekend-keep-going...
3•sharkweek•55m ago•0 comments

Powering the agents: Workers AI now runs large models, starting with Kimi K2.5

https://blog.cloudflare.com/workers-ai-large-models/
2•zenoware•58m ago•0 comments