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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!

Nvidia's Reaches New Record at Nearly $5.3T Value

https://www.forbes.com/sites/antoniopequenoiv/2026/04/27/nvidia-sets-new-record-with-nearly-53-tr...
1•mgh2•31s ago•0 comments

Ideavalu – AI generates startup ideas based on your esperience

https://www.ideavalu.com
1•Sottasan•3m ago•0 comments

Nocord HF – A discord style FT8 client written in Golang

https://github.com/kyleomalley/nocordhf
1•kyleomalley•4m ago•2 comments

A new Moore's Law for AI agents

https://theaidigest.org/time-horizons
1•Cub3•5m ago•0 comments

The Technological Republic, in brief

https://twitter.com/PalantirTech/status/2045574398573453312
1•layer8•8m ago•0 comments

Gardens, Not Roads: Cultivating Open Source Communities

https://tarakiyee.com/gardens-not-roads-cultivating-open-source-communities/
1•g0xA52A2A•9m ago•0 comments

Peerloop – Review three products, get three reviews on yours

https://peerloop.xyz/
2•sssecasiu•18m ago•0 comments

HNSW vector search beyond available RAM for ESP32P4

https://github.com/brunokeymolen/nn20db-sdk
1•brunokeymolen•21m ago•1 comments

Great Paper: The Calculated Typer – Iowa Type Theory Commute Podcast S7 E6

https://pocketcasts.com/podcast/iowa-type-theory-commute/4c437000-eef8-0137-b700-0acc26574db2/gre...
1•matt_d•24m ago•0 comments

Show HN: Vaava – a baby routine tracker / logging app

https://www.vaava.app/
1•jkantola•28m ago•0 comments

WASM is not quite a stack machine

https://purplesyringa.moe/blog/wasm-is-not-quite-a-stack-machine/
2•signa11•31m ago•0 comments

TiddlyWiki v5.4.0

https://tiddlywiki.com/
3•Tomte•33m ago•0 comments

San Francisco, AI capital of the world, is an economic laggard

https://www.economist.com/finance-and-economics/2026/04/26/san-francisco-ai-capital-of-the-world-...
1•1vuio0pswjnm7•33m ago•0 comments

Cold Rush: Cooling Quantum Computers

https://www.science.org/content/article/helium-3-runs-scarce-researchers-seek-new-ways-chill-quan...
1•sudo_cowsay•33m ago•0 comments

Temporal Language Models

https://www.calcifercomputing.com/reports/tlm
1•oldfuture•36m ago•0 comments

QuickQWERTY: Touch typing tutor that runs in the web browser

https://codeberg.org/susam/quickqwerty
1•susam•38m ago•0 comments

Taylor Swift files to trademark voice and image after AI concerns

https://www.bbc.co.uk/news/articles/crm1mygrmv2o
4•austinallegro•38m ago•1 comments

Go is FIPS 140-3 certified

https://bsky.app/profile/filippo.abyssdomain.expert/post/3mkjbzbzxh62b
2•joonas•40m ago•0 comments

Personal Loan EMI Calculator – Check EMI Online – SMFG India Credit

https://www.smfgindiacredit.com/personal-loan-emi-calculator.aspx
1•saumyaraut11•46m ago•0 comments

Academics Need to Wake Up on AI, Part III

https://www.popularbydesign.org/p/academics-need-to-wake-up-on-ai-part-4c6
1•nedruod•47m ago•0 comments

Can Sam Altman be trusted? Musk wants a jury to answer the question

https://www.politico.com/news/2026/04/26/can-sam-altman-be-trusted-elon-musk-wants-a-jury-to-answ...
3•1vuio0pswjnm7•52m ago•2 comments

From Indiana to Idaho, a Backlash Against A.I. Gathers Momentum

https://www.nytimes.com/2026/04/27/technology/ai-artificial-intelligence-backlash.html
3•1vuio0pswjnm7•55m ago•0 comments

European Superheroes

https://europeisnotdead.com/european-superheroes/
1•hyperific•56m ago•0 comments

Show HN: Kplane – Virtual Kubernetes control plane

https://github.com/kplane-dev/kplane
1•lexokoh•57m ago•0 comments

Free Synastry Chart Calculator for Relationship Compatibility

https://synastrychart.org/
1•Jasonleo•1h ago•0 comments

Claude Code IDE – A Local Web IDE Wrapping Claude Code's CLI

https://github.com/Powellga/Claude-Code-IDE
1•greggapowell•1h ago•0 comments

Developer creates a FPS game using Gaussian Splats in browser

https://www.tomshardware.com/software/programming/developer-creates-a-basic-first-person-shooter-...
3•obilgic•1h ago•0 comments

Google Founder Leaves California Due to Socialism

https://www.foxbusiness.com/politics/google-co-founder-rips-california-billionaire-tax-i-fled-soc...
4•silexia•1h ago•1 comments

Three reasons why DeepSeek’s new model matters

https://www.technologyreview.com/2026/04/24/1136422/why-deepseeks-v4-matters/
3•thunderbong•1h ago•0 comments

Show HN: Cask.news – discover and track new homebrew Mac apps

https://cask.news/
1•to•1h ago•0 comments