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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!

80-year-old woman with Alzheimer's took mushrooms and started speaking again

https://www.microdos.in/en/research/alzheimers-case-report-psilocybin-speech
1•LaurensDerisks•1m ago•0 comments

Ask HN: What model/AI platform do you use for the automatic translations?

1•cristaloleg•4m ago•0 comments

The Update Framework (TUF)

https://apis.io/providers/tuf/
1•ankitg12•4m ago•0 comments

Ask HN: Who knows someone at GitHub/NPM team?

2•punkpeye•8m ago•0 comments

'Complex numbers are not needed for quantum mechanics'

https://www.livescience.com/physics-mathematics/complex-numbers-are-not-needed-for-quantum-mechan...
2•bookofjoe•11m ago•0 comments

GPS Camerastamp Photo

https://play.google.com/store/apps/details?id=com.gpsmapcamera.timestamp.geotaglocation.video&hl=...
1•karlnelsone•12m ago•1 comments

Stardew Valley Mod Enables 3D and VR

https://www.rockpapershotgun.com/stardew-valley-enters-the-third-dimension-thanks-to-this-in-deve...
2•makaimc•13m ago•0 comments

Show World

https://zenodo.org/records/21294371
1•mbinatorom•13m ago•0 comments

Show HN: TTSC, TypeScript v7 ToolChain, plugin and codegraph reducing 90% tokens

https://github.com/samchon/ttsc
1•autobe•18m ago•0 comments

Email link phishing: why your email app should always show the URL

https://www.phpfreelance.co.uk/blog/email-link-phishing-your-app-should-always-show-the-url
1•vcdk•22m ago•0 comments

Mini Shai-Hulud: Where SLSA's Boundaries Fall

https://slsa.dev/blog/2026/05/mini-shai-hulud-what-slsa-can-and-cannot-do
1•ankitg12•24m ago•0 comments

TV Time is shutting down. The alternatives are buckling

https://reacham.app/demand-leaks/tv-time
1•neddinn•24m ago•1 comments

AB 2047: California's 3D Printer Surveillance Bill Advances

https://reclaimthenet.org/california-wants-a-watcher-inside-every-3d-printer
2•bilsbie•25m ago•0 comments

Modern environment designs overstimulate the brain, causing discomfort, stress

https://www.stir.ac.uk/news/2026/july-2026-news/looks-good-feels-bad-stirling-led-review-explains...
1•giuliomagnifico•26m ago•0 comments

EU Commission: addictive design Instagram and Facebook in breach of the DSA

https://ec.europa.eu/commission/presscorner/home/en
4•jeroenhd•26m ago•1 comments

Show HN: The Flint Programming Language

https://github.com/flint-lang/flintc
2•zweiler1•27m ago•0 comments

Meta risks $12B EU fine over addictive Instagram and Facebook feeds

https://www.theverge.com/policy/963872/meta-eu-addictive-design-200b-fine-risk-digital-services-a...
2•ilreb•28m ago•0 comments

Size Does Matter

https://nh3.dev/blog/05-bloat
1•cristaloleg•28m ago•0 comments

Cybersecurity Startup Publishes Infostealers to NPM

https://opensourcemalware.com/blog/cybersecurity-startup-publishes-infostealers-to-npm
2•ledoge•29m ago•0 comments

China tests sea-based rocket booster recovery system

https://www.reuters.com/science/china-successfully-tests-sea-based-rocket-booster-recovery-system...
2•olalonde•33m ago•0 comments

The Road to Iroh 1.0

https://www.iroh.computer/blog/the-road-to-iroh-1-0
1•pimterry•33m ago•0 comments

Show HN: Concepticon – manage your team's domain language like source code

https://thinkingtools.software/concepticon/
1•james_ross•34m ago•1 comments

Brown says AI make student brain no work good, teacher should help use it better

https://www.theregister.com/ai-and-ml/2026/07/09/brown-says-ai-make-class-dumb-teacher-must-help-...
1•pseudolus•35m ago•1 comments

Igloo Inc

https://www.igloo.inc/
2•treexs•36m ago•0 comments

20M data entries, a backtest engine, ML models, agents. Still haven't traded

https://demo.botlance.ai/
1•lamne•40m ago•0 comments

More Flock cameras cut down in Houston amid some privacy concerns

https://abc13.com/post/more-flock-cameras-cut-down-houston-amid-privacy-concerns/19471780/
2•pseudolus•40m ago•0 comments

Build Your Own Game Day

https://aws.amazon.com/blogs/architecture/build-your-own-game-day-to-support-operational-resilience/
1•ankitg12•45m ago•0 comments

Replit is the best coding agent

2•anitroves•45m ago•1 comments

EU-hosted analytics isn't the same as EU-owned analytics

https://plausible.io/blog/eu-hosted-analytics-vs-eu-owned-analytics
1•shivam-dev•46m ago•0 comments

Unified Memory, Explained: Why Mini PCs Can Run 70B Models a Big GPU Can't

https://vettedconsumer.com/unified-memory-explained-why-mini-pcs-can-run-70b-models-a-big-gpu-can...
1•ermantrout•46m ago•0 comments