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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!

Security settings every GitHub maintainer should enable this week

https://github.blog/security/6-security-settings-every-github-maintainer-should-enable-this-week/
1•mooreds•4m ago•0 comments

Build your favorite technologies from scratch

https://github.com/codecrafters-io/build-your-own-x
1•kamphey•5m ago•0 comments

What Does a WordPress Development Company Do?

https://www.techwrath.com/what-does-wordpress-development-company-do/
1•techwrath11•7m ago•0 comments

Wine 11.13 – Run Windows Applications on Linux, BSD, Solaris and macOS

https://www.winehq.org/announce/11.13
1•neustradamus•9m ago•0 comments

Agents of Our Own Illiteracy

https://royalicing.com/2026/agents-of-our-own-illiteracy
1•burntcaramel•10m ago•0 comments

Classicist Emily Wilson: 'Odysseus is a different kind of conman'

https://www.ft.com/content/3edbfdf4-cb20-4393-9d5d-ffc1dd241ca4
1•petethomas•12m ago•0 comments

Project Cybersyn

https://en.wikipedia.org/wiki/Project_Cybersyn
1•lschueller•14m ago•0 comments

Hermes – AI that turns customer behavior into actions instead of dashboards

https://tryhermes.dev
1•germainhirwa•15m ago•0 comments

Old Car Racing Photos (2021)

https://toni.org/2021/01/26/old-car-racing-photos/
1•mooreds•15m ago•0 comments

Grok Build hides a Doom-like 'easter egg' game behind the /gboom command

https://runtimewire.com/article/exclusive-grok-build-hides-a-doom-like-easter-egg-game-behind-the...
1•ryanmerket•16m ago•0 comments

A Big Headache for Police: Getting Driverless Cars to Obey Traffic Laws

https://www.wsj.com/business/autos/a-big-headache-for-police-getting-driverless-cars-to-obey-traf...
2•apparent•19m ago•1 comments

GPT-5.6 Luna outperforms GPT-5.5 on health reasoning, while being 25x cheaper

https://twitter.com/OpenAI/status/2075686461693898868
1•rstagi•25m ago•0 comments

The Persistent Gravity of Cross Platform

https://allenpike.com/2021/gravity-of-cross-platform-apps/
1•ingve•26m ago•0 comments

Querying Physical AI Data with Daft

https://www.eventual.ai/blog/egodex-scenario-search
1•DISCURSIVE•26m ago•0 comments

Designing a Listen Later Pipeline

https://www.coryd.dev/posts/2026/designing-a-listen-later-pipeline
1•cdrnsf•27m ago•0 comments

The Sorting Machine

https://sorting-machine.pages.dev
1•StrageMusik•30m ago•0 comments

Ethereum deploys AI agents to hunt bugs, discovers libp2p vulnerability

https://thecoinheadlines.com/tech-and-ai/ethereum-deploys-ai-agents-to-hunt-bugs-discovers-libp2p...
1•ar_writer•34m ago•0 comments

Dozens rescued in southeastern Missouri as 1-in-1k-year rainfall

https://www.cnn.com/2026/07/10/weather/missouri-flood-rescues-campers-climate
1•Bender•37m ago•0 comments

Show HN: A free and open source session recording Chrome extension

3•mohsen1•38m ago•0 comments

The 4-Bitter Lesson: Balancing Stability and Performance in NVFP4 RL

https://humansand.ai/blog/nvfp4-rl
1•Areibman•38m ago•0 comments

Show HN: My lunch-break transformer in C became a book about my toddlers

https://github.com/carlovalenti/TRiP/blob/main/My_TRiP_through_AI-Chapter3.md
1•carlovalenti•39m ago•0 comments

FCC Approves Reflect Orbital's Space Mirror Satellite That Astronomers Hate

https://www.pcmag.com/news/fcc-approves-reflect-orbitals-giant-mirror-satellite-that-astronomers-...
2•healsdata•39m ago•0 comments

Millions told to stay indoors lung-penetrating toxins sweep across two US states

https://www.dailymail.com/sciencetech/article-15969309/toxic-air-arizona-colorado-wildfire-smoke....
1•Bender•40m ago•0 comments

Musk tells Tesla staff to switch to Grok, a model he admits is worse

https://electrek.co/2026/07/10/musk-tells-tesla-staff-switch-grok/
3•Bender•42m ago•1 comments

I run my agency's 10 AI agents from launchd, no n8n, 0 dependencies

https://github.com/Botfather90/digiton-agent-fleet
2•Brandon99pt•44m ago•2 comments

Shuji Nakamura, Nobel Prize winning inventor of Blue LED, working on fusion

https://www.cnn.com/science/shuji-nakamura-lit-up-the-world-and-now-wants-to-power-it-spc
3•osnium123•48m ago•0 comments

Looks good, feels bad? Review explains why modern design can strain your brain

https://www.stir.ac.uk/news/2026/july-2026-news/looks-good-feels-bad-stirling-led-review-explains...
2•hhs•49m ago•0 comments

Let us now praise famous shape rotators

https://hollisrobbinsanecdotal.substack.com/p/let-us-now-praise-famous-shape-rotators
1•HR01•52m ago•0 comments

AIsteels – Materials Intelligence Stack

https://www.aisteels.it/
1•DrNuke•52m ago•0 comments

A Brief History of the Crazy Old 7-Segment Display

https://hackaday.com/2026/07/09/a-brief-history-of-the-crazy-old-7-segment-display/
3•kristianp•53m ago•1 comments