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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•8mo 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!

We used to celebrate science and innovation (2025)

https://www.freethink.com/the-material-world/techno-humanist-manifesto-chapter-9-section-1
1•Brajeshwar•2m ago•0 comments

Show HN: 100% Agentic AI Comedy Podcast

1•helsinki•11m ago•0 comments

MTV Rewind

https://wantmymtv.xyz/player.html
1•boilerupnc•13m ago•0 comments

I built a contract-aware invoice analysis tool

https://concilely.com
1•natedev•18m ago•1 comments

Is Bilt 2.0 worth it?

https://alexchao.substack.com/p/is-bilt-20-worth-it
1•alexchaomander•21m ago•1 comments

Bypassing Gemma and Qwen safety with raw strings

https://teendifferent.substack.com/p/apply_chat_template-is-the-safety
1•teendifferent•23m ago•1 comments

Thicc

https://github.com/elleryfamilia/thicc
1•handfuloflight•25m ago•0 comments

Show HN: Intent Layer: A context engineering skill for AI agents

https://www.railly.dev/blog/intent-layer/
1•Hunter17•30m ago•0 comments

Show HN: Pdfwithlove – PDF tools that run 100% locally (no uploads, no back end)

https://pdfwithlove.netlify.app
2•pratik227•30m ago•0 comments

Nano Banana Prompt Library – AI Image Prompts

https://nano-banana.app/nano-banana-prompts
1•leegrayson2023•37m ago•0 comments

If You Think This Instrument Is Hard to Play, Try Building One

https://www.nytimes.com/2026/01/14/arts/music/oboe-laubin-jim-phelan.html
2•tintinnabula•39m ago•1 comments

Engaging healthily with chess: an Acceptance and Commitment therapist's guide

https://lichess.org/@/tackyshrimp/blog/engaging-healthily-with-chess-an-acceptance-and-commitment...
1•tartoran•41m ago•0 comments

Don't Be an Ola

https://idrank.vodka/ola
1•randomuxx•42m ago•0 comments

Building pawns that transform into every piece [video]

https://www.youtube.com/watch?v=5lISr1OjhjQ
1•num42•46m ago•0 comments

The AI Talent War Is for Plumbers and Electricians

https://www.wired.com/story/why-there-arent-enough-electricians-and-plumbers-to-build-ai-data-cen...
2•gmays•48m ago•0 comments

How to fix your life in 1 hour

https://twitter.com/thedankoe/status/2012956603297964167
1•aierastack•57m ago•0 comments

Show HN: AWS-doctor – A terminal-based AWS health check and cost optimizer in Go

https://github.com/elC0mpa/aws-doctor
2•elC0mpa•1h ago•1 comments

Apple's Inflexibility: A Calculated Trade-Off, Not a Design Flaw

https://medium.com/@ryu360i/the-philosophy-of-constraints-why-apples-inflexible-design-is-a-strat...
2•ryuzaburo•1h ago•1 comments

Tell HN: Perplexity is defaulting to religious sources for secular queries

1•fallinditch•1h ago•1 comments

How I Became a Quant [pdf]

https://engineering.nyu.edu/sites/default/files/2021-10/How_I_Became_a_Quant%20%281%29.pdf
2•sonabinu•1h ago•0 comments

Deep Monitor Truth

https://vis.social/@infobeautiful/115916911669220974
1•colinprince•1h ago•0 comments

Anyone still planning their holidays in Sheets? Try this instead

https://journeyjot.app
1•ahmedcader•1h ago•4 comments

The Multidisciplinary Approach to Thinking

https://fs.blog/great-talks/multidisciplinary-approach-thinking-peter-kaufman/
1•zdw•1h ago•0 comments

MacOS Local Network Privacy Revealed

https://eclecticlight.co/2026/01/18/last-week-on-my-mac-local-network-privacy-revealed/
2•chmaynard•1h ago•0 comments

My thoughts on Gas Town after 10k hours of Claude Code

https://simonhartcher.com/posts/2026-01-19-my-thoughts-on-gas-town-after-10000-hours-of-claude-code/
1•todsacerdoti•1h ago•0 comments

Why Walmart still doesn't support Apple Pay

https://9to5mac.com/2026/01/18/heres-why-walmart-still-doesnt-support-apple-pay/
6•colinprince•1h ago•1 comments

Claude voice mode is still a joke in 2026

https://simonhartcher.com/posts/2026-01-19-claude-voice-mode-is-still-a-joke-in-2026/
2•todsacerdoti•1h ago•2 comments

Bending Time: The Successful Time Travel Experiments Using Kozyrev Mirrors [pdf]

https://patentimages.storage.googleapis.com/4b/09/bb/a36f136bf184bb/RU2122446C1.pdf
1•vinyasi•1h ago•0 comments

Show HN: I treated dating like a Seed Round. Here is the Term Sheet

https://series-seed-relationship-term-sheet.tiiny.site/
1•love-doctor•1h ago•2 comments

Show HN: Skyscraper – A Native iPhone and iPad App for Bluesky

https://apps.apple.com/us/app/skyscraper-for-bluesky/id6754198379
2•CameronBanga•1h ago•0 comments