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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!

European social media newbies step forward as users drift from X

https://www.euractiv.com/news/european-social-media-newbies-step-forward-as-users-drift-from-x/
1•jruohonen•4m ago•0 comments

Vulnerability Spoiler Alert – Exposing Patches Before CVEs

https://vulnerabilityspoileralert.com
2•shaunpud•4m ago•0 comments

When you should bring in the heavy hitters (2017)

https://www.rawsignal.ca/newsletter-archive/when-you-should-bring-in-the-heavy-hitters/
1•downbad_•5m ago•0 comments

Eleata: Validate Peppol/XRechnung/Factur-X EU e-invoices in CI with fix hints

https://eleata.io/
1•hernanqwz•8m ago•0 comments

Claude's Mythos AI model may cause security issues for your money

https://www.rte.ie/brainstorm/2026/0517/1572343-claude-ai-model-security-issues-humans-work-infor...
1•austinallegro•14m ago•0 comments

Show HN: Porting my Newsletter to MCP – You set WHEN and HOW OFTEN to receive it

https://forwardpasstechnology.substack.com/p/you-decide-when-you-receive-forwardpass
1•AlatAnmoku•19m ago•0 comments

Why Do We Sleep Under Blankets, Even on the Hottest Nights? (2017)

https://www.atlasobscura.com/articles/blankets-summer-hot
1•downbad_•20m ago•0 comments

Google Wants to Own the Checkout Button

https://thingswithai.org/posts/google-universal-cart-agentic-commerce
1•UtkarshPatel13•26m ago•0 comments

Show HN: Bytery – a binary JSON protocol ~10x faster and ~10x smaller

https://github.com/jacksonsolid/Bytery
1•teamsolid•26m ago•0 comments

Becalled

https://becalled.eu
1•leaklords•29m ago•0 comments

Chrome and Android‑apps story that predicted today's Googlebooks moment

https://www.windowscentral.com/microsoft/windows-10/flashback-the-2016-chrome-and-android-apps-st...
1•theanonymousone•31m ago•0 comments

Quantifying Physical Activity Energy Expenditure (Compendium)

https://pacompendium.com/
1•rramadass•32m ago•1 comments

Gelatine Sculpt Metabolism Support – Weight-Loss Guide 2026

https://finance.yahoo.com/sectors/healthcare/articles/gelatine-sculpt-exploding-2026-viral-142500...
1•ragypalz•34m ago•0 comments

Femtosecond Jitter: High Performance White Rabbit Timing Receiver

https://gitlab.com/ohwr/project/ertm15-llrf-wr/-/wikis/home
1•KnuthIsGod•37m ago•0 comments

A curated list of static analysis (SAST) tools

https://github.com/analysis-tools-dev/static-analysis
1•saikatsg•39m ago•0 comments

James D. Johnston the father of perceptual audio coding

https://ethw.org/James_D._Johnston
1•KnuthIsGod•44m ago•0 comments

Kevin O'Leary wants AI data centre in Utah. Some residents aren't happy

https://www.cbc.ca/news/world/kevin-oleary-data-centre-utah-9.7207716
1•1vuio0pswjnm7•47m ago•0 comments

C array types are weird

https://anselmschueler.com/blogposts/2025-c-pointers/
1•signa11•48m ago•1 comments

ATV1sm: Bypass for the original Apple TV's EFI verification to boot any EFI OS

https://distrohopper39b.com/atv1sm/
1•866-RON-0-FEZ•50m ago•0 comments

Is PowerBuilder Legacy Technology in 2026?

https://medium.com/@kumaransystemsdm/is-powerbuilder-really-legacy-technology-in-2026-46df8324b7b9
1•rajkumarsekar•50m ago•0 comments

Exon Language: Invitation for Contributors

https://github.com/atdrez/exon/discussions/2
1•atdrez•52m ago•0 comments

How My minimal, memory-safe Go rsync steers clear of vulnerabilities

https://michael.stapelberg.ch/posts/2026-05-24-minimal-memory-safe-go-rsync-vulns/
2•signa11•55m ago•0 comments

Show HN: Antimemetic message that escapes screen capture

https://fx.leftium.com/static
2•Leftium•59m ago•0 comments

Evaluating Quarkdown for Agentic Typesetting

https://quarkdown.com/blog/agent-skill/
1•iamgioh•59m ago•0 comments

'It's called winning': Why a tech industry super PAC is running ads about ICE

https://www.washingtonpost.com/technology/2026/05/23/ai-industry-super-pacs-are-intervening-midte...
3•1vuio0pswjnm7•1h ago•0 comments

Show HN: Cadence – Small marker tracking for source files

https://github.com/skorotkiewicz/cadence
1•modinfo•1h ago•0 comments

Toshifumi Suzuki, 7-Eleven Japan founder, has died

https://www.cnn.com/2026/05/25/asia/711-japan-founder-dies-intl-hnk
2•NaOH•1h ago•0 comments

Show HN: YieldOS-Lite – A simulator for LLM inference control-plane governance

https://github.com/nikitph/yieldos
1•loaderchips•1h ago•0 comments

QG: A speculative protocol treating presence and attention as value primitives

https://github.com/Mureskae/QG
1•Mureskae•1h ago•0 comments

My AI coding flow was burning tokens to do things code should do

https://geerttheys.substack.com/p/i-agent-deterministic-coding-flow
1•toadi•1h ago•1 comments