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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!

The explosive claim that's upended the AI world

https://www.technologyreview.com/2026/10/19/1147149/we-were-looking-at-it-wrong-the-explosive-cla...
1•digital55•31s ago•0 comments

Show HN: AI Agent Security Audit Console – offline audit in 15 min

https://theaioperatorstore.gumroad.com/l/uszyx
1•theaioperator•2m ago•0 comments

NLnet Publishes More Stringent Generative AI Policy

https://nlnet.nl/news/2026/20261020-AI-policy.html
1•enriquelop•3m ago•1 comments

Texas Continued Data Center Permitting After the Governor's Pause

https://fractracker.org/2026/10/texas-data-center-permits-after-governor-halt/
1•DeepLogin•6m ago•0 comments

Show HN: Whospair – a serverless Android messenger over Tor, with voice calls

https://github.com/Whospr/Whospair
1•whospair•6m ago•0 comments

UK bans teachers from displaying Palestine flag and adds 27 pro-Israel rules

https://www.independent.co.uk/news/uk/home-news/schools-teachers-israel-palestine-antisemitism-b3...
1•grandpajoey•6m ago•1 comments

Humans first wore clothing 170k years ago (2011)

https://www.nbcnews.com/id/wbna40965564
1•Tomte•6m ago•0 comments

AI Hasn't Spurred Widespread Layoffs Yet. Why Not?

https://www.library.hbs.edu/working-knowledge/ai-hasnt-spurred-widespread-layoffs-yet-why-not
1•password54321•7m ago•1 comments

Tech billionaires are disrupting biomedical science

https://www.nature.com/articles/d41586-026-03311-9
1•digital55•7m ago•0 comments

Show HN: I built a PHP2Shell tracker with hourly global updates

https://php2shell.uk/
1•hikerell•7m ago•0 comments

GitLab CVSS 10.0 Integer Overflow issue

https://docs.gitlab.com/releases/patches/patch-release-gitlab-19-5-1-released/
1•artooro•8m ago•0 comments

90% of My Skills Are Now Worth $0 – By Kent Beck (2023)

https://newsletter.kentbeck.com/p/90-of-my-skills-are-now-worth-0
1•fagnerbrack•8m ago•0 comments

DMS 2.0: DankMaterialShell is now Dux Shell

https://duxlabs.dev/blog/v2-0-release
1•phren0logy•9m ago•0 comments

Potential third critical PHP CVE

https://elk.zone/m.webtoo.ls/@elise@katze.sh/117479383721672027
1•mpaepper•11m ago•0 comments

Does a Form 144 filing mean the stock will drop? Evidence from 75,654 notices

https://equibles.com/research/does-a-form-144-filing-mean-the-stock-will-drop-evidence-from-75-65...
1•daniel3303•11m ago•0 comments

PHP Vulnerability – Helper Tool

https://speedbits.io/products/infinity-tools/
1•mrw381•11m ago•1 comments

Flint 40B: Frontier Local LLM (Fast 125 Tps on MacBook)

https://twitter.com/RichardSocher/status/2112944385415426249
2•debdut•12m ago•0 comments

Running ClickHouse on Nvidia Vera CPU

https://clickhouse.com/blog/clickhouse-performance-on-nvidia-vera
1•zX41ZdbW•13m ago•0 comments

xkcd: Vulnerability

https://xkcd.com/3314/
4•tnosirrah•14m ago•0 comments

Show HN: I built ESP32-S3 LED tubes for live coding

https://github.com/genbs/reactive-leds
3•genbs•14m ago•0 comments

Ask HN: How long before we use AI to hack John Deere or our Cars?

1•BizarroLand•15m ago•1 comments

Show HN: Word Press Function Trivia

https://wordpress.greg.technology/
1•gregsadetsky•15m ago•0 comments

An open source experiment: OSS as a set of agent prompts, not code

https://github.com/briandilley/shifted
2•briandilley•15m ago•1 comments

Flow Typing, a New Lens on Linearity

https://jaredforsyth.com/posts/papers-we-love-lens-on-linearity/
2•azhenley•15m ago•0 comments

Shift-1: a SOTA coding router that saves 55% compared to Astra

https://shift.ac/sign-in
2•bscharfstein•16m ago•0 comments

Calibration, Accuracy, and Domain Variation in 1M Prediction Market Forecasts

https://www.pnas.org/doi/10.1073/pnas.2615627123
1•joecobb•17m ago•0 comments

A Cocktail Party in the Street: An Interview with Alan Stillman (2010)

https://www.ediblegeography.com/a-cocktail-party-in-the-street-an-interview-with-alan-stillman/
1•NaOH•19m ago•0 comments

Unthrown: Explicit errors as values for TS – a third channel for the unexpected

https://github.com/btravstack/unthrown
1•baptou12•20m ago•0 comments

CA+SF 2026 Ballot Notes

https://vote.kandangath.com/
1•sshanky•20m ago•0 comments

Canonical's LaunchPad PPA is having an outage

https://launchpad.net
1•ucirello•23m ago•0 comments