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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!

Show HN: A sandbox for running real jailbreak techniques against local LLMs

https://github.com/joshfischer1108/jailbreak-lab
1•joshfischer1108•2m ago•0 comments

GTFO VR Postmortem

https://dsprtn.dev/posts/GTFO-VR-Postmortem/
1•jhartikainen•2m ago•0 comments

Proposal for universal AI ethics standard against country censorship

https://www.omrajguru.com/writings/aistandard
1•omrajguru•3m ago•0 comments

Spine – a knowledge graph of your repo, in 7 languages, that feeds an agent

https://github.com/synaptixs/spine
1•Falconsol13•3m ago•0 comments

Show HN: I made a Strava for logging degen trades on WSB

https://topyolo.com/
1•dignaga69•3m ago•0 comments

Show HN: Sokkan – my Claude Code sessions kept forgetting, so I gave them memory

https://sokkan.ch
1•micaudn•3m ago•0 comments

Real Money, Fake Models: Deceptive Model Claims in Shadow APIs

https://arxiv.org/abs/2603.01919
1•sysoleg•4m ago•0 comments

Show HN:Math Grid – Japan's 100-square math drill (hyakumasu keisan)

https://apps.apple.com/ca/app/math-grid-100-squares/id6779562830
1•emile_labs•9m ago•0 comments

Cutting China reliance would cost the West $23T, research suggests

https://www.ft.com/content/c6c1f5a5-3332-471b-87d5-253e03f8b90a
1•giuliomagnifico•11m ago•0 comments

Gofi – go tooling for Ubiquiti Unifi gear

https://github.com/emergingrobotics/gofi
1•gherlein•12m ago•0 comments

Ampere, open-source battery charge control for Apple Silicon Macs

https://amperebattery.app/
1•elgs•12m ago•1 comments

Recognition of unfamiliar predators in horses through only visual predator cues

https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0349298
1•bookofjoe•13m ago•0 comments

Humans evolved to be twice as big as our ancestors

https://www.newscientist.com/article/2533221-how-humans-evolved-to-be-twice-as-big-as-our-ancestors/
1•ike_usawa•13m ago•0 comments

Neglected software update caused widespread Telstra network outage

https://www.theguardian.com/business/2026/jul/17/telstra-missing-software-update-undocumented-des...
1•prawn•14m ago•0 comments

Get notified about open slots at campgrounds / huts / cabins all over the world

https://getcabinfever.com/en/last-minute
1•felixdoerp•14m ago•0 comments

50 vs. 60 Hz and Alzheimer's Disease, an AI Exploration

https://github.com/mankins/50Hz-vs-60Hz-Alzheimers
1•mankins•16m ago•0 comments

Should AI usage be explicitly disclosed in movies and TV shows?

https://www.unite.ai/should-ai-usage-be-explicitly-disclosed-in-movies-and-tv-shows/
1•50kIters•17m ago•0 comments

Value, quality or growth: three investing philosophies based on 12 years of data

https://aito.ai/blog/value-quality-or-growth-who-was-right/
1•arauhala•17m ago•0 comments

Zero Weights Deterministic Graph Language Model (MSE-GLM)

https://tonlexianert.com/pages/blog.php
1•clifffodokidza•21m ago•0 comments

Ask HN: Best courses/resources to learn SEO?

1•danilovilhena•22m ago•0 comments

Why AI Infrastructure Is Becoming More Important Than AI Models

https://geekyants.com/blog/self-healing-ai-agents-the-future-of-enterprise-automation-needs-gover...
2•maria46•23m ago•0 comments

Blatant AI slop just won a 25k USD DeepMind Kaggle Grand Prize

https://www.kaggle.com/competitions/kaggle-measuring-agi/discussion/724918#3498423
56•twerkmeister•26m ago•8 comments

Show HN: Tiny and CSP-safe expression language for JavaScript

https://github.com/robinvdvleuten/xprsn
1•robinvdvleuten•29m ago•0 comments

Windows XP Simulation by Kimi K3

https://windows-xp.kimi.site/
2•uneven9434•32m ago•0 comments

Ask HN: Whats the worst site that you have encountered for accessibility?

3•a11ymaster•33m ago•1 comments

Get your FREE custom Email

https://bottled.email
2•Spark88•41m ago•2 comments

EU to force Google to share search data and open up AI on Android

https://arstechnica.com/gadgets/2026/07/its-official-eu-will-force-google-to-share-search-data-an...
4•goplayoutside•52m ago•1 comments

Show HN: Vulnsy – A platform for vulnerability management and reporting

https://www.vulnsy.com
1•MrTurvey•54m ago•0 comments

Now, even Russia's most elite hackers are using Clickfix to infect devices

https://arstechnica.com/security/2026/07/now-even-russias-most-elite-hackers-are-using-clickfix-t...
3•joozio•54m ago•0 comments

ScreenWall – Turn old phones into synced widgets for your space

https://screenwall.app/
2•buibuibui•56m ago•0 comments