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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•10mo 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!

Show HN: A simulated computer on Mars with real orbital mechanics

https://marsputer.com/
1•kilroy123•8s ago•0 comments

Univers Mechanics

1•tech_founder•1m ago•0 comments

The Internet Is a UGC Reaction Video Now

https://www.joanwestenberg.com/the-entire-internet-is-a-ugc-reaction-video-now/
1•latexr•2m ago•0 comments

AI datacenters create heat islands around them

https://www.theregister.com/2026/04/01/ai_datacenter_heat_islands/
1•speckx•2m ago•0 comments

OpenAI Demand Sinks on Secondary Market as Anthropic Runs Hot

https://www.bloomberg.com/news/articles/2026-04-01/openai-demand-sinks-on-secondary-market-as-ant...
1•helsinkiandrew•3m ago•0 comments

How physicists proved that quantum weirdness is a feature, not a bug

https://www.scientificamerican.com/article/how-physicists-proved-that-quantum-weirdness-is-a-feat...
1•Brajeshwar•4m ago•0 comments

Save the Pacific Northwest Tree Octopus

https://zapatopi.net/treeoctopus/
1•runarberg•4m ago•0 comments

ContextCore: AI Agents conversations to an MCP-queryable memory layer

https://reach2.ai/context-core/
1•mihaitoth•6m ago•1 comments

Show HN: A word puzzle inspired by Wordle, based on binary search

https://hilogame.cc/
1•ludovicianul•7m ago•0 comments

Show HN: pqaudit – scan your codebase for quantum-vulnerable cryptography

https://github.com/PQCWorld/pqaudit
1•xMKx•7m ago•1 comments

Structure Revealer Bookmarklet – A11y Tools

https://a11y-tools.com/blog/2026/03/new-bookmarklet-structure-revealer/
1•speckx•8m ago•0 comments

Wikipedia Gacha

https://wikigacha.com/?lang=EN
1•reorder9695•10m ago•0 comments

Anthropic Races to Contain Leak of Code Behind Claude AI Agent

https://www.wsj.com/tech/ai/anthropic-races-to-contain-leak-of-code-behind-claude-ai-agent-4bc5acc7
3•sonabinu•10m ago•0 comments

Iran war sparks renewables boom as Europeans rush to buy solar, heat pumps, EVs

https://www.euronews.com/2026/03/31/iran-war-sparks-renewables-boom-as-europeans-rush-to-buy-sola...
2•vrganj•10m ago•0 comments

Show HN: PixelPeople – Generate people in pixel art for React

https://youcefhq.github.io/pixelpeople/
1•YoucefHQ•11m ago•0 comments

Supreme Court hears birthright citizenship case with Trump in room

https://www.cnbc.com/2026/04/01/trump-supreme-court-birthright-citizenship.html
3•Betelbuddy•11m ago•1 comments

Rust Implementation of Claude Code

https://github.com/Kuberwastaken/claurst
3•kordlessagain•11m ago•0 comments

Wedeo – a Rust Rewrite of FFmpeg

https://github.com/sharifhsn/wedeo
2•sharifhsn•12m ago•1 comments

Show HN: LinkedIn for Clankers

https://clankerslist.ai/
1•rahulsingh34•12m ago•0 comments

The DI trick that predates keyed services in .NET 8

https://dotnetfiddle.substack.com/p/your-di-container-has-a-secret-pocket
1•refactormonkey•12m ago•0 comments

What Metrics to Monitor in Your Vibe Coded App

https://blog.appsignal.com/2026/04/01/what-metrics-to-monitor-in-your-vibe-coded-app.html
2•Liriel•12m ago•0 comments

Becoming a Day Person

https://herman.bearblog.dev/becoming-a-day-person/
2•surprisetalk•14m ago•0 comments

Puzzlehunts

https://www.vikramsaraph.com/blog/2026/04/01/puzzlehunts/
1•surprisetalk•14m ago•0 comments

A Brief History of Roombas with Fart Spray

https://taylor.town/roombas-with-fart-spray
1•surprisetalk•14m ago•0 comments

Did the CHIPS Act Trigger the Manufacturing Construction Boom?

https://www.factorysettings.org/p/did-the-chips-act-trigger-the-manufacturing
2•surprisetalk•14m ago•0 comments

Tech giant Oracle reportedly blindsides thousands with emailed layoffs

https://www.sfgate.com/tech/article/oracle-layoffs-ai-22175253.php
6•bookofjoe•16m ago•0 comments

Announcement: Temporary LLM Content Ban

https://old.reddit.com/r/programming/comments/1s9jkzi/announcement_temporary_llm_content_ban/
1•birdculture•16m ago•0 comments

The Cathedral, the Bazaar, and the Winchester Mystery House

https://www.dbreunig.com/2026/03/26/winchester-mystery-house.html
1•dbreunig•16m ago•0 comments

Heaviside: Foundation Model for Electromagnetism

https://twitter.com/_i_am_arya/status/2038993003579347247
1•MrBuddyCasino•16m ago•0 comments

Are tech companies even hiring?

3•KernelPryanic•16m ago•1 comments