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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!

Show HN: Reproducible head-to-head benchmarks for WordPress backup plugins

https://backuparena.com
1•ibrahimwithi•4m ago•0 comments

Show HN: A simple timing utility written in Rust

https://github.com/CallMeAlphabet/timeit
1•CallMeAlphabet•6m ago•0 comments

Llambda.lisp an LLM Engine in Pure Common Lisp

https://github.com/jrm-code-project/llambda
1•electricant•9m ago•0 comments

Migrating 65B Database Rows

https://usefathom.com/blog/two-database-migrations-and-a-divorce
1•okozzie•10m ago•0 comments

Most website owners don't know the 5 stages of a domain expiration

https://urlwatch.io/blog/5-stages-domain-expiration.php
1•urlwatch•12m ago•0 comments

The Linux Watchdog Driver API

https://docs.kernel.org/watchdog/watchdog-api.html
1•ankitg12•13m ago•0 comments

WSJ Article Claiming China Has Matched Anthropic Is Obvious Nonsense

https://www.lesswrong.com/posts/2zSpuGJRk6EyjHAL6/wsj-article-claiming-china-has-matched-anthropi...
1•joozio•13m ago•0 comments

Stories Told About Data Centres

https://pxlnv.com/blog/stories-told-about-data-centres/
2•danaris•15m ago•0 comments

Debateee, a place for structured online debates

https://www.debateee.com/
1•mstfah•15m ago•0 comments

Yuji Tachikawa reports Claude Fable solved a 6-month physics roadblock

https://twitter.com/yujitach/status/2076327681562644709
1•sciclaw•19m ago•2 comments

The Infinite Policeman – Chapter 2.000000001->

https://medium.com/luminasticity/the-infinite-policeman-chapter-2-000000001-7fd8da221cd1
1•bryanrasmussen•24m ago•0 comments

Building a Nostr Client (2023)

https://nickmonad.blog/2023/building-nostr-client-index-0/
1•enz•25m ago•0 comments

Bonsai

https://bonsaiedu.org
1•zachwallace•26m ago•0 comments

Dunning-Kruger After AI: The Gap That No Longer Closes

https://blog.zoller.lu/2026/07/dunning-kruger-after-ai-gap-that-no.html
1•thierryzoller•31m ago•0 comments

New Zealand actor Sam Neill, known for Jurassic Park and The Piano, dies at 78

https://cnalifestyle.channelnewsasia.com/entertainment/sam-neill-dead-jurassic-park-actor-585891
3•doppp•34m ago•1 comments

OVS and OVN Explained: The Networking Stack Behind OpenStack

https://www.openstack.org/blog/ovs-and-ovn-explained-the-networking-stack-behind-openstack/
2•ankitg12•43m ago•0 comments

Ransomware negotiator hired to represent victims was working for the attackers

https://arstechnica.com/tech-policy/2026/07/ransomware-negotiator-helped-attackers-extort-his-own...
1•LaSombra•46m ago•0 comments

Show HN: TokenDrift – find hardcoded colors/spacing hiding in your CSS

1•vedantyede•49m ago•1 comments

Pharmacology Simulation Game

https://pharmochi.app/
3•altilunium•50m ago•0 comments

Show HN: Made a website for downloading EU and US LiDAR scans and terrain models

https://hillsha.de
2•jonash54•52m ago•0 comments

Popnix – A Xonix-style land-grab played on 3D bubblewrap

https://playpopnix.com/
1•shauntrennery•52m ago•0 comments

The Winners of the AI Era

https://calcrecipe.com/en/workshop/7
2•wsdn•52m ago•0 comments

Show HN: AgentTransfer now lets agents self-sign-up and get web app hosting

https://agenttransfer.dev/#apps
1•tomatoes2026•56m ago•1 comments

Show HN: Level – a new demo for 8bit Atari XL/XE

https://ilmenit.github.io/level-by-agenda/
2•ilmenit•56m ago•0 comments

10 years of Pokémon Go and the millions still trying to catch 'em all

https://www.bbc.com/news/articles/cevlwk4nrm7o
1•1659447091•56m ago•1 comments

New NSF policy would ban almost all collaborations with Chinese scientists

https://www.science.org/content/article/new-nsf-policy-would-ban-almost-all-collaborations-chines...
3•eecc•58m ago•1 comments

Rumi's Masnavi

https://www.dar-al-masnavi.org/masnavi.html
2•andsoitis•1h ago•0 comments

Is reading others' experiences like a spoiler to life?

https://substack.com/profile/392328897-prakhar-agrawal/note/c-293492268
1•ghostrich•1h ago•2 comments

Rewisp – An ambient screen memory for macOS that never writes images to disk

https://yashmitb.github.io/Rewisp/
1•yashmitb•1h ago•0 comments

Backtrack-Free Cursive

https://mmapped.blog/posts/52-backtrack-free-cursive
7•dmit•1h ago•3 comments