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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•10mo 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!

Toasty, an Async ORM for Rust

https://tokio.rs/blog/2026-04-03-toasty-released
1•carllerche•1m ago•0 comments

The false dawn of the post-literate society

https://unherd.com/2026/04/the-false-dawn-of-the-post-literate-society/
1•anarbadalov•1m ago•0 comments

Mental Health Clothing Brand

https://nosaddays.com/
2•samdreamin•5m ago•1 comments

The uphill climb of making diff lines performant

https://github.blog/engineering/architecture-optimization/the-uphill-climb-of-making-diff-lines-p...
2•angristan•7m ago•0 comments

How the Apple Watch defined modern health tech

https://www.theverge.com/column/906391/apple-watch-optimizer-apple-50-health-tech-wearables
2•brandonb•9m ago•0 comments

NextCloud, Proton and others fork OnlyOffice as true sovereign office suite

https://nextcloud.com/blog/press_releases/industry-initiative-launches-euro-office-as-true-sovere...
2•maxloh•9m ago•0 comments

Oracle Files H-1B Visa Petitions Amid Mass Layoffs

https://nationaltoday.com/us/tx/austin/news/2026/04/03/oracle-files-thousands-of-h-1b-visa-petiti...
4•kklisura•10m ago•0 comments

Artemis II Multimedia: Crew Photos, Videos and Mission Highlights

https://www.nasa.gov/artemis-ii-multimedia/
2•mpweiher•11m ago•0 comments

Show HN: Screenshot web components with one click

https://chromewebstore.google.com/detail/webcap/hiofbhgfmcaiohmbdlajagfbhkikpcim
2•ayakut•12m ago•1 comments

DropSmith – Generate structured NPC dialogue for games via MCP

https://www.npmjs.com/package/dropsmith-mcp
2•dropsmith•13m ago•0 comments

Show HN: Language Operator – Kubernetes operator for managing agents at scale

https://github.com/language-operator/language-operator
3•fretlessjazz•15m ago•0 comments

Carnus: Exploring the Privacy Threats of Browser Extension Fingerprinting [pdf]

https://www.cs.uic.edu/~polakis/papers/karami-ndss21.pdf
3•1vuio0pswjnm7•15m ago•0 comments

Run multi-service projects locally with AI-friendly unified dashboard

https://github.com/ykosyakov/simple-local
3•ykosyakov•17m ago•0 comments

Automatic Textbook Formalization

https://github.com/facebookresearch/repoprover
4•tzury•17m ago•1 comments

A simple and fast terminal-based note-taking app, build with rust

https://github.com/bakudas/ztlgr
2•bakudas•17m ago•0 comments

Show HN: LangChain Is Dead, Long Live TmuxIsFree

https://github.com/cochranblock/tmuxisfree
2•cochranblock•17m ago•0 comments

The Great Human Divorce

https://earthchronicles.substack.com/p/the-great-human-divorce
2•taguniversalsw•19m ago•1 comments

OpenAI's Fidji Simo Is Taking Medical Leave Amid an Executive Shake-Up

https://www.wired.com/story/openais-fidji-simo-is-taking-a-leave-of-absence/
3•philip1209•19m ago•0 comments

LLM coding is the wrong layer of abstraction

https://bbuyukliev.blogspot.com/2026/04/llm-coding-is-wrong-layer-of-abstraction.html
2•bluetomcat•19m ago•1 comments

Pupils in England losing their thinking skills because of AI, survey suggests

https://www.theguardian.com/technology/2026/apr/02/pupils-england-losing-thinking-skills-because-...
6•gnabgib•19m ago•0 comments

Tracing a Coordinated BLE Device Deployment Across Los Angeles

https://github.com/AndriiKempa/BLEIOT/discussions/34
2•KempaAndrii•19m ago•0 comments

Show HN: Autheona – The API That Stops Fake Sign-Ups

https://autheona.com/
2•lasgawe•19m ago•0 comments

Bike Safety Rules in Cities

https://decasia.org/tech/2026/04/bike-safety.html
2•decasia•22m ago•0 comments

Gajim 2.4.5 has been released – GTK XMPP/Jabber Chat Client – Communication

https://gajim.org/posts/2026-03-30-gajim-2.4.5-released/
2•neustradamus•23m ago•0 comments

Can a machine "understand" like a human? The Chinese room argument

https://en.wikipedia.org/wiki/Chinese_room
2•Muhammad523•23m ago•1 comments

A new Postcrossing stamp from the USA

https://www.postcrossing.com/blog/2026/03/31/a-new-postcrossing-stamp-from-the-usa
1•Tomte•27m ago•0 comments

New digital hall passes track bathroom breaks, gather data in NYC schools

https://gothamist.com/news/new-digital-hall-passes-track-bathroom-breaks-gather-data-in-nyc-schools
2•gnabgib•32m ago•1 comments

Show HN: Mrg – Clean miscellaneous files created by macOS

https://github.com/ilotoki0804/mrg
1•ilotoki0804•32m ago•0 comments

Review into mental health conditions, ADHD and autism: interim report

https://www.gov.uk/government/publications/independent-review-into-mental-health-conditions-adhd-...
1•irickt•33m ago•1 comments

New microwave frying technique could make French fries much healthier

https://www.sciencedaily.com/releases/2026/04/260402042803.htm
3•AdmiralAsshat•33m ago•0 comments