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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•9mo 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!

Humanitarian crisis looming: 300k displaced as Israeli army pounds Lebanon

https://www.france24.com/en/humanitarian-crisis-looming-300-000-displaced-as-israeli-army-pounds-...
1•pera•3m ago•0 comments

Data Center Intelligence at the Price of a Laptop

https://tomtunguz.com/qwen-9b-matches-frontier-models/
1•vinhnx•4m ago•0 comments

Show HN: WebGPU Running a Swin Transformer

https://fungi.renderlab.cc
1•hirako2000•7m ago•0 comments

Americans' electricity bills are up. Don't blame AI

https://www.economist.com/finance-and-economics/2026/03/05/americans-electricity-bills-are-up-don...
1•pingou•8m ago•0 comments

Warmto.me Record a voice note after networking, AI writes your follow-up

https://www.warmto.me
1•aimoae•9m ago•1 comments

A Tour of Acme (2012)

https://research.swtch.com/acme
1•tosh•14m ago•0 comments

Jse v2.0 AI Output Specification

https://marchliu.github.io/2026/03/07/jse-v20-ai-output-specification
1•mars_liu•14m ago•0 comments

AI Angels – a platform for creating personalized AI companions

1•aiangels_24•14m ago•0 comments

I don't know if my job will still exist in ten years

https://www.seangoedecke.com/will-my-job-still-exist/
1•s_dev•15m ago•1 comments

Show HN: Ptero, a Svelte Alternative to Docusaurus

https://github.com/yail259/ptero
1•yaoke259•15m ago•0 comments

ma

http://www.call-with-current-continuation.org/ma/README
2•tosh•17m ago•0 comments

Show HN: SPF Flattener Solves the 10-Lookup Limit using recursive DNS resolution

https://spf1.com/
1•bwoud•18m ago•1 comments

Show HN: Visual drag-and-drop README builder with live GitHub preview

1•ofershapira•18m ago•0 comments

Show HN: MCP Starter Kit – Production-Ready TypeScript Template for MCP Serve

https://github.com/junna-legal/mcp-starter-kit
1•KJ_Labs•18m ago•0 comments

Sith Names and Darth Titles – Ultimate Dark Side Name Guide for Star Wars Fans

https://starwarsnamegenerator.com/blog/ultimate-sith-names-guide
1•Jaxon_Varr•19m ago•1 comments

Show HN: Anypost – P2P (group)chat with calls

https://anypost.xyz/
1•emilss•20m ago•0 comments

Show HN: I built Asterode, a multi model AI app with memory and power features

https://asterode.ai
2•stefbuzas•20m ago•1 comments

The $130/Month AI Agent Stack That Replaced a $200k Marketing Team

2•jackcofounder•20m ago•0 comments

UTF-8 History (2003)

https://www.cl.cam.ac.uk/~mgk25/ucs/utf-8-history.txt
1•tosh•22m ago•0 comments

Sarajevo Safari

https://en.wikipedia.org/wiki/Sarajevo_Safari
2•thunderbong•25m ago•0 comments

Specialization After Generalization: Towards Understanding Test-Time Training

https://arxiv.org/abs/2509.24510
1•teleforce•25m ago•0 comments

Capital Efficiency and the Tech Layoff Correction (2020-2025)

https://datakid.org/r/2026-03-07-jxhde2
1•tigerkid•27m ago•0 comments

Build an Agent That Learns from Its Own Mistakes [video]

https://www.youtube.com/watch?v=-stDHMwbBRw
1•malgamves•33m ago•0 comments

Filesystems Are Having a Moment

https://madalitso.me/notes/why-everyone-is-talking-about-filesystems/
2•malgamves•34m ago•0 comments

Show HN: Vimalender a Vim style calendar for the terminal written in Go

https://github.com/Sadoaz/vimalender
2•sadoaz•36m ago•0 comments

The salary cap debate has Major League Baseball gearing up for war

https://www.theguardian.com/sport/2026/feb/27/mlb-salary-cap-stoppage-owners
1•PaulHoule•36m ago•0 comments

We messed up with the Windows 12 article. What we got wrong and how it happened

https://www.pcworld.com/article/3079754/we-messed-up-with-the-windows-12-article-what-we-got-wron...
1•joshstrange•36m ago•1 comments

Use Claude for free through Amazon customer support

https://xcancel.com/pseudotheos/status/2029957370323870040
2•doener•36m ago•0 comments

Show HN: SimplAI – Build and deploy AI agents and workflows without boilerplate

https://simplai.ai
1•SimplAI_ai•37m ago•0 comments

Show HN: I applied Notion-logic to a Canvas

https://kanvas-app-zeta.vercel.app
1•giaco_hendel•37m ago•0 comments