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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•12mo 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!

Hantavirus Map

https://hantavirusmap.net/
1•leonvonblut•41s ago•0 comments

Wrote this for humans, now I use it as a prompt

https://x-x.codes/posts/supplementary-guide-to-code-reviews
1•alex_x•1m ago•1 comments

Sick of Ads on Free QR Generator

https://miqr.mx/
1•rubiocanino•3m ago•1 comments

Genera OS

https://wiki.c2.com/?GeneraOs
1•tosh•4m ago•0 comments

Leak reveals Google's Aluminium OS with a 16-minute video

https://www.androidauthority.com/google-aluminium-os-leak-3665979/
1•thunderbong•5m ago•0 comments

The Role of HubSpot in Driving Successful CRM Adoption in Africa

https://amdan.pro/the-role-of-hubspot-in-driving-successful-crm-adoption-in-africa/
1•amdanmerit•6m ago•0 comments

Tep: A Sinatra-flavoured framework that compiles to a native binary via Spinel

https://github.com/oripekelman/tep
1•futurecat•10m ago•0 comments

Show HN: Design posters showcasing your country's electrical grid

https://github.com/open-energy-transition/grid2poster
1•lyoncy•15m ago•0 comments

European governments: 3.000 tracking sites, 1.000 phpMyAdmins, and 99% poorly

https://internetcleanup.foundation/2026/05/european-governments-3000-tracking-sites-1000-phpmyadm...
4•aequitas•18m ago•2 comments

A Brazilian Space Launch System for the Small Satellite Market

https://www.mdpi.com/2226-4310/6/11/123
1•rbanffy•19m ago•0 comments

Show HN: FreedomLang, a small AOT language where the compiler is just JavaScript

https://github.com/DO-SAY-GO/freelang
1•keepamovin•20m ago•0 comments

The Download: a Nobel winner on AI, and the case for fixing everything

https://www.technologyreview.com/2026/05/12/1137103/the-download-nobel-winner-ai-maintenance-of-e...
1•joozio•20m ago•0 comments

The Emacsification of Software

https://sockpuppet.org/blog/2026/05/12/emacsification/
2•rdslw•23m ago•0 comments

Google announces Googlebooks with Gemini Intelligence focus

https://9to5google.com/2026/05/12/googlebooks-announcement/
1•pjmlp•25m ago•0 comments

Weird A.I

https://www.computer.org/csdl/magazine/an/2026/01/11442847/2eXeigMA4eI
3•tosh•28m ago•0 comments

A Critique of Cybernetics, by Hans Jonas (1953) [pdf]

https://s3.amazonaws.com/arena-attachments/892605/f0747c7943bec99f4891969d4a808ecd.pdf
2•lukebuehler•29m ago•1 comments

Axavive vs. Collagen: Which Is Best for Skin in 2026?

https://finance.yahoo.com/sectors/healthcare/articles/axavive-skin-exploding-2026-golden-22590060...
2•natujaiq•30m ago•0 comments

Hella Jongerius: I am a design pastor (holistic d-ethics)

https://www.youtube.com/watch?v=pME7hgUqpmE
2•vi_sextus_vi•30m ago•0 comments

Why AI Projects Fail

https://krellixlabs.com/en/blog/why-ai-projects-fail
3•radu_me•31m ago•0 comments

Digger engines drive JCB's attempt on hydrogen-powered land speed record

https://www.thetimes.com/uk/transport/article/jcb-hydromax-world-land-speed-record-lqvqgx0cp
2•sorentwo•31m ago•0 comments

"I applied to be pope"

https://www.thestandard.com.hk/world/article/331886/I-applied-to-be-pope-Losing-grip-on-reality-w...
4•hansmayer•31m ago•0 comments

Hella Jongerius Retools UN Delegates' Lounge Preserves Dutchness (NY 2013)

https://metropolismag.com/projects/hella-jongerius-retools-u-n-delegates-lounge/
1•vi_sextus_vi•32m ago•0 comments

AI Will Hit a Wall in 2026, if nothing changes [video]

https://www.youtube.com/watch?v=XA84pSrPHS0
1•mpweiher•33m ago•0 comments

The Ozempic plateau may be caused by the drug starving the gut bacteria

https://www.researchhub.com/proposal/32164/gut-microbiomescfa-axis-as-a-pharmacodynamic-modifier-...
2•cryptarsh•34m ago•0 comments

EU iPhones Get AirPods-Style Pairing for Third-Party Wearables in iOS 26.5

https://www.macrumors.com/2026/05/11/ios-26-5-eu-third-party-wearable-changes/
1•cgeier•34m ago•0 comments

How to Build Better Startup Products Using Apple's Thinking

https://comuniq.xyz/post?t=1069
1•01-_-•39m ago•0 comments

Trump Says Nvidia CEO Jensen Huang Is Flying with Him to China

https://www.forbes.com/sites/siladityaray/2026/05/13/trump-says-nvidia-ceo-jensen-huang-is-flying...
2•01-_-•40m ago•0 comments

Chrome IndexedDB: SQLite back end

https://chromestatus.com/feature/5161589557821440
1•fofoz•43m ago•0 comments

The role of cat eye narrowing movements in cat–human communication (2020)

https://www.nature.com/articles/s41598-020-73426-0
3•mifydev•44m ago•0 comments

One Startup Is Gambling. Ten Is Mathematics

https://www.mynameisfeng.com/blog/one-startup-is-gambling-ten-is-mathematics
6•edward8628•47m ago•5 comments