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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!

Videos Contradict Trump Administration Account of ICE Shooting in Minneapolis

https://www.nytimes.com/video/us/100000010631041/minneapolis-ice-shooting-video.html
1•shepherdjerred•1m ago•1 comments

Nanoplastics have diet-dependent impacts on digestive system health

https://phys.org/news/2025-12-nanoplastics-diet-impacts-digestive-health.html
1•PaulHoule•3m ago•0 comments

Why does mint make water taste so cold?

https://theconversation.com/why-does-mint-make-water-taste-so-cold-a-scientist-explains-267550
1•wjb3•4m ago•0 comments

Ruby 4.0 released – but its best new features are not production ready

https://devclass.com/2026/01/06/ruby-4-0-released-but-its-best-new-features-are-not-production-re...
1•thunderbong•7m ago•0 comments

Giant phantom jellyfish spotted deep in Pacific

https://www.popsci.com/environment/giant-phantom-jellyfish-spotted-deep-in-pacific/
2•wjb3•8m ago•0 comments

A.I. Slop Will Crescendo into a Cultural Shift [video]

https://www.youtube.com/watch?v=QyIlxg3z2eQ
1•mooreds•10m ago•0 comments

MiniMax jumps 54% in Hong Kong debut after US$619M IPO

https://www.businesstimes.com.sg/startups-tech/startups/minimax-jumps-54-hong-kong-debut-after-us...
1•dworks•11m ago•0 comments

The week where time stops making sense

https://afterburnout.co/p/the-week-where-time-stops-making-sense
1•mooreds•11m ago•0 comments

The Relation Between Mathematics and Physics – Paul Dirac(1939)

https://www.damtp.cam.ac.uk/events/strings02/dirac/speach.html
1•nill0•12m ago•0 comments

Render AI Revit: AI Rendering for Revit Workflows

https://vocus.cc/article/695f61eafd89780001924d64
1•architech_willy•13m ago•0 comments

This guy raised $40k riding Uber

https://substack.com/inbox/post/183505174
1•haddadda•14m ago•0 comments

The Isolator

https://en.wikipedia.org/wiki/The_Isolator_(helmet)
1•mojoe•15m ago•1 comments

Wilsonic: Open-Source Musical Scale Explorer

https://www.wilsonic.co
2•gyomu•16m ago•0 comments

Account Linking

https://ciamweekly.substack.com/p/account-linking
1•mooreds•16m ago•0 comments

Show HN: Claude Code for Django

https://github.com/kjnez/claude-code-django
1•cui•21m ago•0 comments

Misadventures in Dtrace with macOS

https://jade.fyi/blog/misadventures-in-dtrace/
1•vsgherzi•22m ago•0 comments

I tried to be the government. It did not go well

https://www.theatlantic.com/magazine/2026/02/individual-federal-services-replacement/685333/
1•m-hodges•26m ago•0 comments

Show HN: Executable Markdown files with Unix pipes

3•jedwhite•29m ago•0 comments

Benchmark: Replacing Vector RAG with Context Trees to Fix Gemini Hallucinations

https://www.byterover.dev/blog/why-vector-rag-fails-for-code-we-tested-it-on-1-300-files
1•lanchiii•30m ago•1 comments

Language Modeling, Part 2: Training Dynamics

https://connorjdavis.substack.com/p/language-modeling-part-2-training
1•cjamsonhn•31m ago•0 comments

Global Revolution: Sven Beckert's "Capitalism"

https://www.jdbreport.com/p/sven-beckert-capitalism
1•JameDB•32m ago•0 comments

The Concerning Amount of Malware on the VS Code Marketplace

https://github.com/microsoft/vsmarketplace/blob/main/RemovedPackages.md
1•shadow-ninja•32m ago•0 comments

The JDB Report

https://www.jdbreport.com/
1•JameDB•33m ago•0 comments

Nvidia wants to power robotaxi fleets with chips, software by 2027

https://www.cnbc.com/2026/01/05/nvidia-plans-to-test-a-robotaxi-service-in-2027-in-self-driving-p...
1•gmays•36m ago•1 comments

Apple Watch blood sugar monitoring a step closer as new tech launches

https://9to5mac.com/2026/01/08/apple-watch-blood-sugar-monitoring-a-step-closer-as-new-tech-launc...
3•brandonb•40m ago•0 comments

GPT-4o selected optimal CT protocols more frequently than Radiologists

https://doi.org/10.1148/radiol.252105
1•hdoMRIphysics•42m ago•1 comments

I'm making a game engine based on dynamic signed distance fields (SDFs) [video]

https://www.youtube.com/watch?v=il-TXbn5iMA
3•camilleroux•43m ago•0 comments

Mole: Deep clean and optimize your Mac

https://github.com/tw93/Mole
1•handfuloflight•44m ago•2 comments

Manim Has Been Hacked

https://manim.community/
3•aizk•45m ago•4 comments

Show HN: Various Shape Regularization Algorithms

https://github.com/nickponline/shreg
1•nickponline•45m ago•0 comments