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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!

In Retrospect: Science – The Endless Frontier

https://www.nature.com/articles/466922a
1•teleforce•2m ago•0 comments

Jfsendit – A dead-simple way to send files straight from one browser to another

https://jfsendit.com/
1•coinfused•2m ago•0 comments

Google's YouTube settles social media addiction case with teen

https://www.bbc.co.uk/news/articles/cly81g7x73po
1•vinni2•4m ago•0 comments

New WingTask with TaskWarrior 3 sync support

https://wingtask.com/announcing-new-wingtask
1•Cort3z•7m ago•0 comments

Show HN: SQL MCP Server – 61.37% on DataAgentBench with GLM-5.2

https://github.com/gagarwal304/databridge
1•gagarwal123•8m ago•0 comments

Workdir: Open-source sandboxes for AI agents

https://workdir.dev/
1•handfuloflight•8m ago•0 comments

Digital Dugnad

https://digitaldugnad.eu/en/
1•bronlund•8m ago•0 comments

Israel continues to commit genocide by targeting children in Gaza, UN finds

https://www.theguardian.com/world/2026/jun/23/israel-deliberately-targeting-gaza-children-to-comm...
4•hebelehubele•9m ago•0 comments

"Be Yourself" Only Works for People Who Aren't Annoying

https://www.cartoonshateher.com/p/be-yourself-only-works-for-people
1•Michelangelo11•9m ago•0 comments

SHO HN: RainBreak App Mac – The AI doesn't need a break. But you do

https://rainbreak.franzai.com/
1•franze•10m ago•0 comments

What Happens When Claude Tests Your Web Application?

https://searchzee.com/blog/ai-agent-tests-web-application
1•rajkverma123•10m ago•0 comments

Crypto 2026 Accepted Papers

https://crypto.iacr.org/2026/acceptedpapers.php
1•altro•17m ago•0 comments

Show HN: Dk

https://github.com/hq6/dk
1•hq6•19m ago•0 comments

The Importance of Establishing Boundaries with Your DOM: Stealing 1Password Keys

https://guyfischman.com/posts/1password-delegation/
2•guyfischman•25m ago•0 comments

Unreliable Agentic Systems in Production

1•shasyn•26m ago•0 comments

Oxford's top maths professor: 'The devil could use AI to destroy the world'

https://www.telegraph.co.uk/books/non-fiction/interview-oxford-professor-john-lennox/
1•01-_-•27m ago•0 comments

Anthropic Mythos exposed flaws in classified US systems

https://www.channelnewsasia.com/business/anthropics-mythos-model-found-vulnerabilities-in-classif...
2•01-_-•27m ago•0 comments

The Robotics Experiment Loop

https://rerun.io/learn
3•Tycho87•28m ago•0 comments

The $80 Pie Only a Former McKinsey Consultant Could Dream Up

https://www.grubstreet.com/article/jamagansett-pie-hamptons-baked-goods.html
1•Michelangelo11•29m ago•0 comments

Eight vaccines linked to a lower risk of dementia

https://www.gavi.org/vaccineswork/eight-vaccines-linked-lower-risk-dementia
2•u1hcw9nx•30m ago•0 comments

Ask HN: Best full text RSS news sources?

1•walden789•31m ago•0 comments

A desktop wrapper for orchestrating web design AI agents

https://github.com/swiftsellai-ssa/sticky/releases/tag/v1.0.0
1•gabriel_sstech•37m ago•0 comments

Ask HN: What do you do when your one model hits Limit?

1•ZaanCogil•37m ago•0 comments

Lies, Damn Lies and Database Benchmarks

https://questdb.com/blog/lies-damn-lies-and-database-benchmarks/
1•birdculture•39m ago•0 comments

Oracle's 21,000 layoffs help drive its debt-fueled AI investments

https://arstechnica.com/ai/2026/06/oracles-21000-layoffs-help-drive-its-debt-fueled-ai-investments/
2•joozio•41m ago•0 comments

Employee #1: Reddit (2016)

https://www.ycombinator.com/blog/chris-slowe-interview/
1•downbad_•43m ago•0 comments

World Cup 26 Goal Map– every goal, live

https://a-maherr.github.io/wc2026-goalmap/
2•theanonymousone•44m ago•0 comments

Excellent Repairability: Steam Machine Tear-Down and Accessing RAM and SSD [video]

https://www.youtube.com/watch?v=glXA3ObwSwQ
2•jrepinc•45m ago•0 comments

Segregation by Design (Urban Planning)

https://www.segregationbydesign.com
1•kristopolous•45m ago•0 comments

An interesting read about aviator callsigns

https://www.war.gov/News/Feature-Stories/Story/Article/2903882/aviator-call-signs-the-history-nam...
1•callsign_bats•46m ago•0 comments