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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•12mo 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!

Keats, Letters

https://sites.ualberta.ca/~dmiall/Tintern07/KeatsLet.htm
1•highfrequency•1m ago•0 comments

Rust but Lisp

https://github.com/ThatXliner/rust-but-lisp
1•thatxliner•4m ago•0 comments

Qwench is a terminal typing game for Linux, Windows, Mac. Built with Crossterm.

https://github.com/BitPusher16/qwench
1•carodgers•4m ago•1 comments

War.gov/UFO/ UFO file download reference repo

https://github.com/dopper/nts-ufos
1•dopper•6m ago•0 comments

London's BT Tower to get rooftop swimming pool

https://www.theregister.com/offbeat/2026/05/09/londons-bt-tower-to-get-rooftop-swimming-pool/5237337
1•samizdis•8m ago•0 comments

The 90 Day disclosure policy is dead

https://blog.himanshuanand.com/2026/05/the-90-day-disclosure-policy-is-dead/
2•unknownhad•8m ago•0 comments

Blog Post Tells the Time

https://alexsci.com/blog/this-blog-post-tells-the-time/
1•saeedesmaili•11m ago•0 comments

Show HN: Free OSS transcription app I made and found it's faster than wispr flow

https://mumbli.app/
2•fireharp•13m ago•0 comments

The Rise of Emotional Surveillance

https://www.theatlantic.com/culture/2026/05/worker-surveillance-emotion-ai/687029/
4•iugtmkbdfil834•18m ago•1 comments

Web Server on a Nintendo Wii

http://wii.sjmulder.nl/
1•adunk•18m ago•0 comments

Hugging Face's Clem Delangue: Stop Comparing Engines to Cars

https://www.turingpost.com/p/clem-delangue-hugging-face-ai-builders
1•gmays•19m ago•0 comments

Japan is deploying ultra-cheap cardboard drones built for swarm warfare

https://www.tomshardware.com/tech-industry/japan-is-deploying-ultra-cheap-cardboard-drones-built-...
1•_____k•19m ago•1 comments

Geography Is Four-Dimensional

https://sive.rs/4d
1•ColinWright•27m ago•0 comments

Feedback on my local-first AI assistant project?

https://github.com/joshuatic/voxel
1•joshuatic•29m ago•1 comments

Lies, damned lies, and Elastic's benchmarks

https://www.gouthamve.dev/lies-damned-lies-and-elastics-benchmarks/
1•gouthamve•36m ago•0 comments

A hacker ran me over with a robot lawn mower

https://www.theverge.com/tech/925696/yarbo-robot-lawn-mower-hack-remote-control-camera-access-mqtt
2•gnabgib•36m ago•0 comments

Does it scale? Who cares (2011)

https://jacquesmattheij.com/does-it-scale-who-cares/
1•downbad_•39m ago•1 comments

IRGC to generate revenue from undersea internet cables in Strait of Hormu

https://twitter.com/IranIntl_En/status/2053206979330392414
1•us321•41m ago•0 comments

Trump Media and Technology Group lost $406M in first three months of 2026

https://www.theguardian.com/us-news/2026/may/09/trump-media-and-technology-group-loses-406m-first...
4•vinni2•42m ago•2 comments

An Excerpt from "Go the Fuck to College" by Adam Mansbach

https://www.fatherly.com/parenting/go-the-fck-to-college-essay-adam-mansbach
1•johntfella•46m ago•1 comments

Consumer AI's ARPU Problem

https://twitter.com/SashaKaletsky/status/2051366803897766236
1•gmays•46m ago•0 comments

Can I Copyright a Song I Made with AI?

https://www.musicologize.com/can-i-copyright-a-song-i-made-with-ai/
2•speckx•49m ago•1 comments

ScalaTimes – A Free, Once-Weekly Scala News Flash

https://scalatimes.com
1•TheWiggles•50m ago•0 comments

Show HN: Sigma Guard – deterministic contradiction checks for graph memory

1•invariantjason•52m ago•0 comments

RustChat is a minimal team messenger, alternative to Slack, Mattermost, Zulip

https://rustchat.io/
2•xvilka•54m ago•0 comments

PostgresBench: A Reproducible Benchmark for Postgres Services

https://clickhouse.com/blog/postgresbench
1•saisrirampur•55m ago•0 comments

Show HN: AI Design Taste – Design.md Generator

https://chromewebstore.google.com/detail/ai-design-taste-designmd/peclkdlolmcclhhgpoehpikgknbmkknc
1•novateg•58m ago•0 comments

The Mismeasure of Open Source

https://nesbitt.io/2026/05/09/the-mismeasure-of-open-source.html
1•bmitch3020•1h ago•0 comments

RL Benchmark "Ant" in Hardware

https://github.com/Openmind-Research-Institute/open-ant
1•lupusorina•1h ago•0 comments

TypeScript checker and language service written in Rust

https://tsz.dev/
2•jcbhmr•1h ago•0 comments