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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!

Tyler Cowen: A Doomsday Scenario for American AI

https://www.thefp.com/p/tyler-cowen-a-doomsday-scenario-for
1•paulpauper•1m ago•0 comments

Tcpcat: High-speed TCP port scanner in Go using eBPF and AF_XDP

https://github.com/NycolazSec/tcpcat
1•tcpcat•1m ago•0 comments

People Are Putting Their Phones Down for IRL Interactive Games

https://www.nytimes.com/2026/09/26/style/immersive-interactive-games-chicago-new-york.html
1•mikhael•2m ago•0 comments

Show HN: Withmcp – A quick, system-wide MCP toggle

https://github.com/lava/withmcp
1•HotHotLava•3m ago•0 comments

Solus Linux Adopts Formal AI and LLM Contribution Policy

https://linuxiac.com/solus-linux-adopts-formal-ai-and-llm-contribution-policy/
1•gpi•8m ago•0 comments

Show HN: Leftovers – find the processes your coding agents left running on macOS

https://github.com/arpwal/leftovers
1•arpitagarwal•10m ago•0 comments

Deployment Platform for Vite

https://void.cloud/
2•jcbhmr•13m ago•0 comments

Palantir's Co-Founder Wants Us Less Judgmental About Deadly Iran School Strike

https://www.motherjones.com/politics/2026/09/palantirs-co-founder-thinks-we-should-be-less-judgme...
4•cdrnsf•21m ago•0 comments

OpenAI Codex agents go rogue and consumes USD 78,000 without authorization

46•lorenzomassaro•22m ago•14 comments

AI Political Alignment Quiz

https://aipoliticalcube.com/
1•soldieroftok•29m ago•1 comments

Yarn 6 Preview

https://v6.yarnpkg.com/blog/2026-01-28-yarn-6-preview.html
2•dzogchen•29m ago•0 comments

AI Data Center Are Monkey Business [video]

https://www.youtube.com/watch?v=2g7doI0BGrs
3•naughtiusmax•34m ago•0 comments

Practice Methods for Piano

https://terfi.fyi/blog/practice-methods-for-piano
2•taran_narat•43m ago•0 comments

Something Deep Inside Earth Keeps Messing with the Length of Our Days

https://gizmodo.com/something-deep-inside-earth-keeps-messing-with-the-length-of-our-days-2000816070
1•gmays•44m ago•0 comments

Show HN: ExactOdds – provably fair games that prove the rules

https://github.com/ceedot-rock/exactodds
1•SlidPhiLabs•45m ago•0 comments

Could an iced coffee freeze you out of the job market?

https://www.bbc.com/news/articles/cv62k9p1rz4do
1•bbg2401•46m ago•0 comments

Unexpected Consequences of an Economic Crisis Nobody Is Talking About

https://johnwalter25.substack.com/p/10-unexpected-consequences-of-an
2•momentmaker•50m ago•0 comments

Show HN: Built with Bend – A directory of projects built with Bend

https://builtwithbend.com/
1•rasulkireev•50m ago•0 comments

Upping My P(doom) (Official Music Video)

https://www.youtube.com/watch?v=tfWEFBvogug
1•sznio•54m ago•0 comments

Dofigen: A high(er)-level YAML/JSON format for generating Dockerfiles

https://github.com/lenra-io/dofigen
1•kadrek•56m ago•0 comments

Madeira – Run Windows PC games on a non-jailbroken iPhone

https://github.com/willfaust/Madeira
1•metrofun•56m ago•0 comments

Julia-1: decision model that runs on almost anything

https://supersoniclabs.ia.br/julia-1/
3•handfuloflight•57m ago•0 comments

Former Meta CTO's Strategy on Scaling Green Tech (Mike Schroepfer) [video]

https://www.youtube.com/watch?v=KdBTEhLRLDU
1•domhudson•58m ago•0 comments

The Hardest of Scrabbles: Solopreneurship

https://molochinations.substack.com/p/the-hardest-of-scrabbles-solopreneurship
1•domhudson•1h ago•0 comments

Calendario – Google, Outlook and Zoom calendars in one browser popup

https://chromewebstore.google.com/detail/calendario/bnmmigoiecilbkipdngjofpbpaoofnoi
1•suthargk•1h ago•0 comments

Foreman: An agent supervisor and software factory foreman

https://github.com/thruwire/foreman
3•handfuloflight•1h ago•0 comments

How to Tell If Someone Is Cheating on Chess.com

https://chesscheatdetector.com/blog/how-to-tell-if-someone-is-cheating-on-chess-com/
1•domhudson•1h ago•0 comments

A Simple Puzzle Reveals the Jagged Edge of AI's Abilities

https://aatishb.com/blog/2026/ai-jagged-intelligence/
1•aatish•1h ago•0 comments

Noillirk: A fun twist on Krillion and Family Feud

https://playdaily.org/noillirk
4•Hemmaamlin•1h ago•1 comments

The literacy crisis is people's inability to read for context

https://bsky.app/profile/julieslalonde.bsky.social/post/3mweffhm4tk2b
2•LeoPanthera•1h ago•0 comments