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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•1y 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!

Commanding Heights

https://commanding-heights.com/
1•jger15•1m ago•0 comments

Show HN: Everyday Toolz – free calculators that run in the browser, no sign-up

https://everydaytoolz.com/
1•anupghimire•2m ago•0 comments

How long do you need to hold down the power button to turn off a PC?

https://www.osnews.com/story/146273/how-long-do-you-need-to-hold-down-the-power-button-to-turn-of...
1•Arodex•6m ago•0 comments

Claude Ultra Plan

https://support.claude.com/en/articles/17728952-what-is-the-ultra-plan
1•stschaef•9m ago•2 comments

Show HN: Umbra ported to Python 3 (unfinished FLOSS Lovecraftian CRPG from 2001)

https://github.com/dbohdan/umbra
1•networked•10m ago•0 comments

Why Google, Microsoft, Anthropic and OpenAI need their own AI detection tools

1•nitishr•13m ago•0 comments

Hop – Install Linux next to Windows without a USB stick

https://github.com/Arjun-Ingole/hop/blob/main/docs/ARCHITECTURE.md
2•philonoist•21m ago•0 comments

Virilix – Natural Male Vitality and Wellness Support

https://prezi.com/i/kynakgjgds4m/virilix-capsules-reviews-my-alert-virilix-review-virilix-capsule...
1•marthajuke•22m ago•1 comments

Show HN: KuralHub 1.0, Speech emotion datasets for 70 languages in one place

https://aaivu.github.io/KuralHub/datasets.html
2•luxshan_t•24m ago•0 comments

Show HN: Undertone – synced lyrics and beat visualizer on Linux's desktop layer

https://github.com/Mohit-Aasirwal/undertone
1•Mohit-Aasirwal•25m ago•0 comments

Rare meteorite from Mars gives us a view into its ancient crust

https://arstechnica.com/science/2026/10/rare-meteorite-from-mars-gives-us-a-view-into-its-ancient...
1•ulrischa•28m ago•0 comments

Ask HN: How do you verify a reported domain sale is real?

1•mousabelhag•28m ago•0 comments

Show HN: No moat – Software is dead. Nobody told these companies

https://nomoat.app/
1•olijboyd•29m ago•0 comments

Remixable Software

https://lamp.dev/#shelf
1•ReDeiPirati•29m ago•0 comments

The Commanding Heights

https://commanding-heights.com/#top
1•thm•33m ago•0 comments

Tell HN: Warp.dev Security Incident

2•himata4113•34m ago•0 comments

The RP2350 can do full motion video playback

https://github.com/raphlinus/vic-2350
1•raphlinus•35m ago•0 comments

Android version distribution in October 2026: Android 16 leads

https://www.heise.de/en/news/Android-version-distribution-in-October-2026-Android-16-leads-115048...
2•theanonymousone•44m ago•0 comments

Custom GPTs Are Retiring: How to Migrate Before Dec 11

https://quickchat.ai/post/custom-gpt-retirement-migration
1•piotrgrudzien•45m ago•0 comments

I built the free S3 client I needed because the existing felt clunky

https://nimbo.emil.moe/
1•emilmoe•46m ago•1 comments

State of the Prompt: What People Ask AI

https://stateoftheprompt.net/
2•Anon84•47m ago•0 comments

Switch Lowering in GCC

https://xoranth.net/gcc-switch/
9•signa11•47m ago•0 comments

I trained a tic-tac-toe bot on 7k games between real people

https://tictoe.org/
1•Ildefonso123•50m ago•0 comments

AttoQR – An Android app for generating and testing EMVCo payment QR codes

https://play.google.com/store/apps/details?id=com.dev.myqr&hl=en_US
1•AttoExaSolution•51m ago•0 comments

Keyword Search 101: How BM25 Scores

https://deployed-ai.io/blog/bm25-explained/
1•danielklnstein•52m ago•0 comments

Social Policy Builds Financial Markets

https://economicsociology.org/2026/08/28/how-social-policy-builds-financial-markets/
1•kome•54m ago•0 comments

Conic Sections Rebellion

https://en.wikipedia.org/wiki/Conic_Sections_Rebellion
2•_Microft•55m ago•0 comments

So you want to become a Root CA?

https://kuber.studio/blog/Technology/So-you-want-to-become-a-Root-CA
2•kuberwastaken•56m ago•0 comments

Nvidia Nemotron 3.5 Bolt E4B 4GB

https://research.nvidia.com/labs/nemotron/NVIDIA-Nemotron-3.5-Bolt-E4B-4GB/
1•armcat•1h ago•0 comments

Ranji Smile: The forgotten chef who opened America's first Indian restaurant

https://www.bbc.com/news/articles/crm941n0413o
1•tosh•1h ago•0 comments