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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!

Thinking in the Margins

https://theamericanscholar.org/thinking-in-the-margins/
1•SegfaultSeagull•9m ago•0 comments

The Revenge of the Data Scientist

https://hamel.dev/blog/posts/revenge/
1•prabal97•11m ago•0 comments

Eval-Driven Development: Applying TDD Principles to AI Agent Prompts

https://iris-eval.com/blog/eval-driven-development
1•iparent•12m ago•0 comments

Vanilla Claude vs. GitAuto Test Generation

https://gitauto.ai/blog/vanilla-claude-vs-gitauto-test-generation
1•nishiohiroshi•14m ago•0 comments

Show HN: Phantom – Let AI use your API keys without leaking them

https://github.com/ashlrai/phantom-secrets
1•masonwyatt23•16m ago•0 comments

Wikipedia officially bans AI-generated content

https://nypost.com/2026/03/28/tech/wikipedia-officially-bans-ai-generated-encyclopedia-entries/
2•1vuio0pswjnm7•17m ago•0 comments

Can You Guess What Tests a Calculator Needs?

https://gitauto.ai/blog/can-you-guess-what-tests-a-calculator-needs
1•nishiohiroshi•17m ago•0 comments

What Are Adversarial Tests and Why We Run Them

https://gitauto.ai/blog/what-are-adversarial-tests
1•nishiohiroshi•18m ago•0 comments

Indonesia Starts First Southeast Asia Social Media Ban for Kids

https://www.bloomberg.com/news/articles/2026-03-28/indonesia-starts-first-southeast-asia-social-m...
1•1vuio0pswjnm7•19m ago•0 comments

Indonesia's social media curbs for under 16s take set to start

https://www.reuters.com/business/media-telecom/indonesias-social-media-curbs-kids-set-saturday-fe...
1•1vuio0pswjnm7•20m ago•0 comments

Nice Graphs – Text to chart in one click

https://nice-graphs.com/pt
1•domiuau•23m ago•1 comments

Elon Musk's last co-founder reportedly leaves xAI

https://techcrunch.com/2026/03/28/elon-musks-last-co-founder-reportedly-leaves-xai/
3•SilverElfin•26m ago•1 comments

A n00B PM's guide to vibe coding kernels from scratch

https://www.ddmckinnon.com/2026/03/28/a-n00b-pms-guide-to-vibe-coding-kernels-from-scratch/
2•dmckinno•27m ago•0 comments

Aging Is a Software Problem

https://twitter.com/davidasinclair/status/2037966418453410024
1•dschol•28m ago•0 comments

Show HN: Local-first dictation for macOS – Parakeet TDT, zero cloud calls

https://typedwith.ai/
1•newtechwiz•29m ago•0 comments

FreeBSD, Caddy and PHP – a perfect match (2022)

https://it-notes.dragas.net/2022/07/18/freebsd-caddy-and-php-a-perfect-match/
1•indigodaddy•31m ago•0 comments

Iteration should increase value, not just output

https://vibe2value.com/iteration-should-increase-value/
1•mattcameron•32m ago•0 comments

Anthropic Wins Injunction in Court Battle with Trump Administration

https://www.wsj.com/politics/policy/anthropic-wins-injunction-in-court-battle-with-trump-administ...
1•theahura•33m ago•0 comments

Room fee no bar cut

https://dollar-tree.neocities.org/BLOG060725
1•gregsadetsky•34m ago•0 comments

Anthropic May Have Had an Architectural Breakthrough

https://twitter.com/AndrewCurran_/status/2037967531630367218
1•kok14•37m ago•2 comments

Learn what your AI built. easily

https://github.com/jstuart0/sourcebridge
1•Craze0•44m ago•0 comments

Which AI Calculates Taxes Correctly?

https://thefinancebuff.com/ai-tax-calculator.html
1•hnburnsy•44m ago•1 comments

How flat is your name

https://matthewc.dev/musings/baby-names/
1•matthewfcarlson•46m ago•0 comments

Show HN: NoEyes – Terminal chat where the server is architecturally blind

https://github.com/Ymsniper/NoEyes
1•Ymsniper•1h ago•0 comments

As Platforms Decay, Let's Put Users First (2023)

https://www.eff.org/deeplinks/2023/04/platforms-decay-lets-put-users-first
2•QuadrupleA•1h ago•0 comments

Peer-to-peer sync for a reading app with mTLS, CRDTs, and HLCs

https://tech.stonecharioteer.com/posts/2026/merrilin-local-sync/
1•stonecharioteer•1h ago•0 comments

Show HN: JSONPath Benchmark in Java (SJF4J vs. Jayway)

1•hannyu•1h ago•1 comments

6o6 v1.1: Faster 6502-on-6502 virtualization for a C64/Apple II Apple-1 emulator

http://oldvcr.blogspot.com/2026/03/6o6-v11-faster-6502-on-6502.html
6•classichasclass•1h ago•0 comments

What's Your Hour in 'Silicon Valley Time'? (2015)

https://medium.com/backchannel/how-the-tech-press-forces-a-narrative-on-companies-it-covers-5f89f...
1•_air•1h ago•0 comments

Making and Machines

https://www.chrbutler.com/making-and-machines
1•jfil•1h ago•0 comments