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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!

When Is Enough?

https://ivanca.github.io/ai/elite/2026/03/15/when-is-enough/
1•AmbroseBierce•1m ago•0 comments

I built V2 of my AI answer generator

https://99helpers.com/tools/ai-answer-generator
1•nickk81•6m ago•1 comments

Home-Made Shock Diamond

https://physics.stackexchange.com/questions/41293/home-made-shock-diamond
1•whalee•6m ago•0 comments

Six ingenious ways how Canon DSLRs used to illuminate their autofocus points

https://exclusivearchitecture.com/03-technical-articles-CSDS-00-table-of-contents.html
1•ExAr•6m ago•1 comments

Britain's Populist Right Has Surrendered Its Mind to America

https://liambyrne.substack.com/p/take-back-control
2•tastyface•7m ago•0 comments

The enshittification of Amazon paperback books

https://www.alexerhardt.com/en/enshittification-amazon-paperback-books/
2•aerhardt•8m ago•0 comments

Microsoft Hasn't Had a Coherent GUI Strategy Since Petzold

https://www.jsnover.com/blog/2026/03/13/microsoft-hasnt-had-a-coherent-gui-strategy-since-petzold/
2•freetonik•9m ago•0 comments

Largest German gym for humanoid robots being built in Munich

https://www.heise.de/en/news/Largest-German-gym-for-humanoid-robots-being-built-in-Munich-1120721...
1•thm•10m ago•0 comments

Open Alleged PhotoDNA

https://github.com/ArcaneNibble/open-alleged-photodna
1•edent•12m ago•0 comments

Multi-Claude – manage multiple Claude CLI accounts with shared and cloud sync

https://www.npmjs.com/package/@ghackk/multi-claude
1•geeky_geeker•13m ago•1 comments

The Operator That Dethroned a King: Python's Walrus Operator Story

https://techlife.blog/posts/the-operator-that-dethroned-a-king-pythons-walrus-operator-story/
1•clarkmaxwell•14m ago•0 comments

I Used Claude Code to reverse engineer a 13-year-old game binary

https://old.reddit.com/r/ClaudeAI/comments/1ru3irp/i_used_claude_code_to_reverse_engineer_a/
1•virgildotcodes•15m ago•1 comments

Agent Context Is Data. Treat It That Way

https://medium.com/@a.mandyev/agent-context-is-data-treat-it-that-way-cd8bcfd03ced
1•andrey_m•19m ago•1 comments

UK must build own nuclear missiles, say Lib Dems

https://www.bbc.co.uk/news/articles/cy0dz1k0rr4o
1•mmarian•20m ago•0 comments

How will we know if AI is smart enough to do science?

https://www.science.org/content/article/how-will-we-know-if-ai-smart-enough-do-science
1•XzetaU8•22m ago•0 comments

Why libraries have a hold on me: A love letter

https://www.csmonitor.com/The-Home-Forum/2026/0306/reading-library-books
1•Tomte•26m ago•0 comments

PDF2Markdown – Free online converter and API for PDF/images to Markdown

https://pdf2markdown.io
1•ntbperst•27m ago•1 comments

How Journalists Can Make AI Work for Them

https://www.cjr.org/analysis/how-journalists-can-make-ai-work-for-them.php
1•Tomte•27m ago•0 comments

Your Mac and a Canon Printer

https://furbo.org/2026/03/14/your-mac-and-a-canon-printer/
3•chmaynard•29m ago•0 comments

Pathways to a fair technological future [pdf]

https://storage02.forbrukerradet.no/media/2026/02/breaking-free-pathways-to-a-fair-technological-...
1•gostsamo•29m ago•0 comments

Self-Evolving Skill for Claude Code – v3 validation complete

https://github.com/191341025/Self-Evolving-Skill
1•tiansenxu•32m ago•3 comments

LotusNotes

https://computer.rip/2026-03-14-lotusnotes.html
1•TMWNN•33m ago•0 comments

Replace Cloud Hosting with a Raspberry Pi

https://doap.metal.bohyen.space/blog/post/domain-addressable-home-paas-raspberry-pi/
1•nanacnote•35m ago•0 comments

I built vault-gated credential storage in a Tauri/Rust desktop app

https://r2desk.greeff.dev
3•pio_greeff•48m ago•1 comments

Jürgen Habermas, German philosopher and sociologist, dies aged 96

https://www.theguardian.com/world/2026/mar/14/jurgen-habermas-german-philosopher-and-sociologist-...
1•mellosouls•50m ago•0 comments

Tech's Empiricism Problem

https://deadsimpletech.com/blog/tech_empiricism_problem
1•HotGarbage•52m ago•0 comments

Virtual AI Team Instead of OpenClaw

https://timdietrich.me/blog/virtual-ai-team-instead-of-openclaw/
3•davemateer•52m ago•1 comments

OpenFlow – Dashboard for Managing Claude Code Sessions with RuFlo

https://github.com/ai-genius-automations/openflow
3•andycodeman•56m ago•1 comments

Poll: What mobile OS do you primarily use?

1•chistev•59m ago•0 comments

You Need Deterministic Gates for Probabilistic AI Agents

https://www.appsoftware.com/blog/you-need-probabilistic-gates-for-deterministic-ai-agents
3•gbro3n•1h ago•1 comments