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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!

Cisco used AI to write security incident reports, with mixed results

https://www.theregister.com/security/2026/05/22/cisco-used-ai-to-write-security-incident-reports-...
1•01-_-•7m ago•0 comments

AI progress creates more work for humans, not less

https://every.to/p/after-automation
1•trueduke•7m ago•0 comments

The Inheritance of Survival

https://brandypigeon.substack.com/p/the-inheritance-of-survival
1•rendx•7m ago•0 comments

Acrisure layoffs to number 2,250, attributed to AI advancements

https://www.detroitnews.com/story/business/2026/05/20/grand-rapids-acrisure-to-cut-2250-jobs-cite...
1•01-_-•8m ago•0 comments

You can't whisper at an AI agent

https://stripe.dev/blog/ai-steering-experiments
1•vinhnx•9m ago•0 comments

Matching Principle: Adversarial, augmentation, etc. are estimators of one matrix

https://arxiv.org/abs/2605.22800
2•visark_42•11m ago•0 comments

Roundtables: Can AI Learn to Understand the World?

https://www.technologyreview.com/2026/05/21/1137756/roundtables-can-ai-learn-to-understand-the-wo...
1•joozio•16m ago•0 comments

Are no-frills utility knives the underrated sweet spot for EDC?

https://www.paragon-knives.com/
1•bgzlsxaz•17m ago•0 comments

Technology Today Influence Us

https://negativestarinnovators.com/
1•pizzly•18m ago•0 comments

Pokélike

https://pokelike.xyz/
2•Areibman•21m ago•0 comments

The humiliation of finding secret Israeli bases in Iraq

https://responsiblestatecraft.org/israeli-bases-iraq/
1•KoftaBob•22m ago•0 comments

Report Alleges Chinese Influence Behind AI Data Center Pushback in the U.S.

https://dominotheory.com/report-alleges-chinese-influence-behind-the-ai-data-center-pushback-in-t...
2•ironyman•24m ago•0 comments

Picovoice Discointinues Free Tier

https://console.picovoice.ai/
1•vghaisas•24m ago•1 comments

Duster: Tor Service Attribution Based on Flow Watermarking with Track Hiding [pdf]

https://www.usenix.org/system/files/raid2019-iacovazzi.pdf
2•rbanffy•31m ago•0 comments

Can a Mouse Survive a Fall from a High-Rise?

https://johnmjennings.com/can-a-mouse-survive-a-fall-from-a-high-rise/
1•thunderbong•34m ago•0 comments

Attributing Northvolt's Bankruptcy

https://www.globaltimes.cn/page/202602/1354840.shtml
1•leonidasrup•35m ago•0 comments

Will Ever David Defeat Goliath? Epic vs. Apple

https://www.macrumors.com/2026/05/21/apple-supreme-court-epic-games-case/
1•enricotal•37m ago•0 comments

Pressure from Silicon Valley helped block Trump's expected order on AI

https://www.washingtonpost.com/politics/2026/05/22/last-minute-lobbying-by-tech-industry-official...
2•thm•39m ago•0 comments

POC for CVE-2026-46529 – RCE via PDF argv injection

https://github.com/N1et/CVE-2026-46529
1•zdkaster•41m ago•1 comments

AI may be inflationary before it becomes productive

https://www.axios.com/2026/04/23/ai-inflation-productivity-companies
1•latentframe•43m ago•0 comments

OMLX v0.3.9 Stable Merges Native MTP (Multi-Token Prediction)

https://github.com/jundot/omlx/releases/tag/v0.3.9
1•febed•44m ago•0 comments

QuantumAi Blockchain and Aethermind Update

https://qbc.network/blog/v121-four-validators-aether-on-gpu
1•BlockArtica•46m ago•1 comments

Should be illegal (but it's not)

https://zenodo.org/records/20338929
1•anasteciadunu•46m ago•0 comments

Sales and Dungeons: Thermal Printer Ttrpg Utility

https://sales-and-dungeons.app/
2•hyperific•49m ago•0 comments

Chinese authorities destroy villager's 10-storey Studio Ghibli-esque home

https://www.theguardian.com/world/2026/may/22/china-officials-destroy-ramshackle-10-storey-studio...
1•mykowebhn•49m ago•0 comments

Check DNS bind configuration with Sparrow and Python

https://sparky.sparrowhub.io/report/scc/29082#Report/
1•melezhik•54m ago•1 comments

A.I. Learns to Optimize Factorio Blueprints [video]

https://www.youtube.com/watch?v=mGOKKtIDNbk
1•bmn__•55m ago•0 comments

Preconditioning Vectors: Making Elasticsearch VectorDB BBQ Work for Every Vector

https://www.elastic.co/search-labs/blog/elasticsearch-bbq-preconditioning-vectors
1•eigenBasis•56m ago•0 comments

MathML

https://developer.mozilla.org/en-US/docs/Web/MathML
1•tosh•1h ago•1 comments

The cost of military deployments (and why Europe is running out of time)

https://vulpesetleo.substack.com/p/pulling-5000-troops-from-germany
1•hnsa•1h ago•0 comments