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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•11mo 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!

HomeDesignsAI

https://homedesigns.ai
1•bellamoon544•4m ago•0 comments

Progressively Improving a Ball of Mud

https://afilina.com/improving-ball-of-mud
1•luu•5m ago•0 comments

The best ideas come from the arena

https://www.reproof.app/blog/amex-history
1•maguay•8m ago•0 comments

ZAYA1-8B: An 8B Moe Model with 760M Active Params Matching DeepSeek-R1 on Math

https://firethering.com/zaya1-8b-open-source-math-coding-model/
1•steveharing1•9m ago•0 comments

Ask HN: Does a vetted marketplace improve hiring?

1•Sam6late•10m ago•0 comments

Subquadratic claims to have fixes attention scaling with 12M context window

https://twitter.com/alex_whedon/status/2051663268704636937
1•jiwidi•13m ago•0 comments

Who edited the date stamp of this post

https://xcancel.com/iamasoothsayer/status/1535494638391664641?s=46%0A
2•razodactyl•18m ago•0 comments

The Semantic Conception of Truth and the Foundations of Semantics(1944)

https://www.ditext.com/tarski/tarski.html
2•nill0•21m ago•0 comments

My first post scored 1. Karpathy's autoresearch idea helped me repost

https://github.com/meller/laneconductor
2•meller_a•26m ago•0 comments

Has Meta ever provided Qualcomm EDL files for recovery?

1•nar001•33m ago•0 comments

Mapping Project Complexity with AI

https://www.maiobarbero.dev/articles/project-complexity-ai-skills/
1•maiobarbero•33m ago•1 comments

Show HN: Production-Ready MERN Job Board Template

https://auditjobs.up.railway.app/
1•hlymrk•34m ago•0 comments

Show HN: Crypto Cards – 136 debit/credit cards, MIT-licensed list

https://github.com/mbtrilla/awesome-crypto-cards
1•mbtrilla•36m ago•0 comments

Message Brokers Are Modern Grids(2020)

https://yusufaytas.com/message-brokers-are-modern-grids
3•return_null•37m ago•0 comments

Show HN: Modolap, Improve the Reliability of Your Software Systems

https://modolap.com/
1•ronfriedhaber•38m ago•0 comments

I Wrote a Nix Flake for Helium Browser with Home Manager and NixOS Modules

https://github.com/oxcl/nix-flake-helium-browser
2•oxcl•38m ago•0 comments

Show HN: Social Network for Corporate Cringe

https://CringeOut.com
3•CringeOut•39m ago•0 comments

Plimpton 322 – Babylonian Clay table of triangles 1k years before Pythagoras

https://en.wikipedia.org/wiki/Plimpton_322
1•lifeisstillgood•40m ago•1 comments

Show HN: Uvx privacy-steward for PII removal in texts

https://github.com/AI-Colleagues/privacy-steward
1•NeuralNotwork•41m ago•0 comments

Show HN: Imagev2.me – Tired of juggling AI image subs, so I built one studio

https://imagev2.me/
1•billy42•43m ago•0 comments

SEO-Friendly Public Pages for Confluence

https://marketplace.atlassian.com/apps/356517983/public-pages-for-confluence
1•MaxBabenko•43m ago•0 comments

AI Agent Drained for $200K with This One Tweet Hack

https://www.ccn.com/news/crypto/ai-agent-drained-for-200k-with-this-one-tweet-hack-heres-how/
2•aledevv•48m ago•0 comments

SpaceX IPO gives Musk power and curbs shareholder rights

https://www.reuters.com/sustainability/boards-policy-regulation/spacex-ipo-gives-musk-sweeping-po...
3•denis1•49m ago•1 comments

USB-Vault v1.0.0 – Deterministic Password Generator

https://github.com/emilianosolazzi/USB-Vault
1•emilianosolazzi•49m ago•0 comments

DeepSeek-v4-Pro and Hermes: Unauthorized Modification of Security Controls

https://www.eddieoz.com/deepseek-v4-pro-hermes-unauthorized-modification-of-security-controls/
1•eddieoz•52m ago•0 comments

Rapid: Property-Based Testing for Go

https://github.com/flyingmutant/rapid
1•ThierryBuilds•54m ago•0 comments

How long does it take you to get back into a project after a few days away?

1•mahi_01•56m ago•0 comments

Microsoft in Talks to Ax Energy Pledge Amid Data Center Boom

https://www.bloomberg.com/news/articles/2026-05-06/microsoft-clean-power-target-on-chopping-block...
1•zekrioca•57m ago•0 comments

15 things I learnt launching AI projects in Government (4-part blog post)

https://puntofisso.net/blog/posts/things-i-learned-ai-summary/
1•puntofisso•57m ago•1 comments

Show HN: Keysee – deterministic identicons for public keys

https://keysee.io/ui
1•scottmotte•58m ago•1 comments