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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!

From all-or-nothing to task-based OAuth consent

https://blog.cloudflare.com/task-based-oauth-consent/
1•officekamiya•1m ago•0 comments

Python sets and dictionaries can have quadratic-time performance

https://lemire.me/blog/2026/09/03/python-sets-and-dictionaries-can-have-quadratic-time-performance/
1•signa11•9m ago•0 comments

Handoru: AI customer conversation agents for service businesses

https://handoru.ai/
1•Zabrodsk•9m ago•1 comments

Knowing Where to Type 'Zero' (2015)

https://randomascii.wordpress.com/2015/01/19/knowing-where-to-type-zero/
1•signa11•9m ago•0 comments

Writing Docs in LLMese

https://passo.uno/write-docs-llms-language/
1•theletterf•12m ago•0 comments

AI Programming: A Layered Model

https://lemire.me/blog/2026/09/05/ai-programming-a-layered-model/
1•signa11•15m ago•0 comments

Play GTA III in the Browser

https://quenq.com/apps/vice-city-online/
1•rzk•19m ago•0 comments

Notey and Noisy: A Sound Science Mathemusical

https://malwebb.com/notnoi.html
1•_kb•23m ago•0 comments

Show HN: Blunderbase: A Personal Chess Database

https://github.com/philphilphil/blunderbase
1•philphilphil•31m ago•0 comments

Isar Aerospace reaches orbit and deploys payloads on second flight

https://isaraerospace.com/press/history-for-european-spaceflight-isar-aerospace-reaches-orbit-and...
1•mpweiher•32m ago•1 comments

An Open Letter to Bernie Sanders: Regulate AI's Dangers, Don't Ban Its Promise

https://www.unite.ai/an-open-letter-to-bernie-sanders-regulate-ais-dangers-dont-ban-its-promise/
1•50kIters•37m ago•0 comments

GPT-6 Astra Plays Portal

https://www.youtube.com/watch?v=g5u2y0BwRJ0
2•liminal-dev•37m ago•0 comments

"Catching Crumbs from the Table"

https://www.nature.com/articles/35014679
2•stefanpie•37m ago•0 comments

How to Name Things

https://kolemannix.com/blog/how-to-name-things/
1•theanonymousone•44m ago•0 comments

US troops can still be tracked by purchased location data, and Congress wants

https://www.theregister.com/public-sector/2026/09/06/us-troops-can-still-be-tracked-by-purchased-...
4•sbulaev•46m ago•0 comments

Debian Code Search: Fast TurboPFor with Go SIMD

https://michael.stapelberg.ch/posts/2026-09-06-dcs-fast-turbopfor-go-simd/
2•secure•49m ago•0 comments

Agriculture relies on fossil fuels. It's costing us

https://www.technologyreview.com/2026/09/03/1143320/fertilizer-prices-fossil-fuels/
3•joozio•50m ago•0 comments

Show HN: I built a small arena where AI write robot and then fight each other

https://github.com/nigrosimone/llms-robot-arena
3•nsimone•51m ago•0 comments

The Pelican Collection – Simonw Pelican Bicycle Gallery (2024-2026)

https://pelican-model-gallery.alienfluid.chatgpt.site/
3•dv35z•53m ago•0 comments

Hot Chips 2026: Irrational Recap

https://irrationalanalysis.substack.com/p/hot-chips-2026-irrational-recap
4•akshayt•1h ago•0 comments

CobaltC Programming Language Specification

https://strawberry9.github.io/the-wrong-memory/Appendix_06.html
2•VolatileRegiste•1h ago•0 comments

Celebrating Kazakhstan's first wild-born Przewalski's horse in 200 years

https://www.fauna-flora.org/news/celebrating-kazakhstans-first-wild-born-przewalskis-horse-in-200...
7•thunderbong•1h ago•1 comments

MCP server for 340k SVG icons

https://github.com/LeulAria/Aria-Icons
5•leularia•1h ago•0 comments

Our Suggestion Box

https://medium.com/luminasticity/our-suggestion-box-247d754ae1ad
2•bryanrasmussen•1h ago•0 comments

Show HN: Slock – A one-bit messenger inside your capslock key

https://github.com/jonaraphael/slock
4•jonaraphael•1h ago•2 comments

Archival Resource Keys (ARKs) serve as persistent identifiers

https://arks.org/
3•Tomte•1h ago•0 comments

Reimagining projections for the interactive maps era (2021)

https://www.mapbox.com/blog/adaptive-projections
4•gherkinnn•1h ago•1 comments

Site Is Closed on Sundays

https://v7.robweychert.com/
46•edent•1h ago•22 comments

I built an interactive networking lab for learning network engineering

https://net-forge-kappa.vercel.app/
3•OmarAfnan•1h ago•0 comments

An advanced attacker is targeting Salesforce and ServiceNow instances worldwide

https://www.reco.ai/blog/city-forum-campaign-salesforce-servicenow
4•daretograsp•1h ago•0 comments