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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!

Low-cost, evasive malware for benchmarking reverse engineering capabilities

https://malwarebench.com
1•rexpository•2m ago•0 comments

Japan: Scientists develop autonomously swarming robodogs for anti-bear patrols

https://soranews24.com/2026/10/22/japanese-scientists-developing-cute-autonomously-swarming-robo-...
1•snarky-comments•3m ago•0 comments

AI RSS reader with summaries – Brew beta

https://testflight.apple.com/join/CgRdkqc4
1•getbrewapp•3m ago•0 comments

Agent Evals Considered Harmful

https://twitter.com/noriagent/status/2113338229470441579
2•theahura•5m ago•0 comments

Attention people who think UB is fine

https://blog.habets.se/2026/10/Attention-people-who-think-UB-is-fine.html
1•aszlig•5m ago•0 comments

Show HN: TenseMem – deterministic memory for AI agents

https://github.com/tensemem/tensemem
1•shubh-singh•7m ago•0 comments

Robinson vs. Meta Platforms and the Cdafa Consent Defense

https://captaincompliance.com/education/robinson-v-meta-platforms-and-the-cdafa-consent-defense-a...
1•richartruddie•7m ago•0 comments

Show HN: Sudoku, Wordle and Lights Out solvers – hints instead of answers

https://iqiqgame.com/tags/tool-solver
1•fang3651•7m ago•0 comments

HyperCache – Distributed KV-cache quantization and relative RoPE reuse

https://github.com/SamGanYX/HyperCache
1•samganyx•7m ago•0 comments

Esperanto: Most widely spoken constructed auxiliary language

https://en.wikipedia.org/wiki/Esperanto
3•gurjeet•11m ago•0 comments

See how Big Tech is transforming Spain's landscape

https://text.npr.org/nx-s1-5991641
1•mooreds•11m ago•0 comments

I built a social calendar app – be ther social calendar

https://play.google.com/store/apps/details?id=com.bether.app&hl=en_IN
1•gomathamkalidas•17m ago•1 comments

Common PKCS#11 Issues

https://keymirror.io/pkcs11-in-practice-p1.html
1•i2km•17m ago•1 comments

The Token Exchange

https://fusionauth.io/blog/token-exchange-thoughts
1•mooreds•18m ago•0 comments

I Worship Crunch (2017)

https://www.polygon.com/2017/8/23/16184068/why-i-worship-crunch/
1•mooreds•18m ago•0 comments

Introducing TorchTPU

https://pytorch.org/blog/introducing-torchtpu/
1•gmays•27m ago•2 comments

The Surprising Popularity of AI

https://www.economist.com/international/2026/10/22/the-surprising-popularity-of-ai
1•andsoitis•28m ago•0 comments

Bye Bye Alamy

https://neilturnerphotographer.co.uk/2026/10/19/bye-bye-alamy/
1•gnabgib•28m ago•0 comments

Show HN: A wysiwyg Markdown editor for macOS that works with agents

https://kirahowe.com/2026/oct/22/editmd-0-1-0
1•kmclean•30m ago•0 comments

The Shortage Won't Break Nvidia. The Labs Might

https://darrenleung1.substack.com/p/the-shortage-wont-break-nvidia-the
1•crummy•30m ago•0 comments

Germany target of 'intensive' espionage, after suspected Russian spy arrest

https://www.bbc.com/news/articles/cmx28y5e04ggo
3•snarky-comments•32m ago•1 comments

I built a free iPad handwriting notes app that puts the page on your Mac

https://forums.macrumors.com/threads/i-built-a-free-ipad-handwriting-notes-app-that-puts-the-page...
2•bishwasbh•33m ago•0 comments

Show HN: Ployz – a Rust imperative orchestrator and cloud-like UX

https://github.com/getployz/ployz
2•nick-sta•33m ago•0 comments

Cassandra – A News Forecaster

https://github.com/RDMachinery/Cassandra
1•TheScoob•34m ago•0 comments

CabiPro, software for running a cabinet-making workshop

https://cabipro.com
1•shubhkakadia•35m ago•0 comments

Full analysis of the .ida "Code Red" worm

https://seclists.org/bugtraq/2001/Jul/359
1•civilchaos•35m ago•0 comments

Opengame

https://opengame-ecru.vercel.app/
1•Rishivaidy_12•35m ago•0 comments

M3.1 Flash weights are now open

https://www.together.ai/models/minimax-m3-1-flash
1•ryanmerket•37m ago•1 comments

Microsoft says its AI tool is better than doctors at diagnosing conditions

https://zordt.com/
1•vchilkuri•39m ago•0 comments

Someone leaked a Mass Effect 5 trailer and now I feel worse

https://www.pcgamer.com/games/mass-effect/someone-leaked-a-mass-effect-5-trailer-and-now-i-feel-e...
2•evo_9•41m ago•0 comments