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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!

Tort Law at the Frontier of Artificial Intelligence

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=6979919
1•reasonableklout•2m ago•0 comments

German police launch investigation after robot allegedly gropes teenage girl

https://www.cnn.com/2026/10/14/europe/germany-investigation-robot-groping-intl
2•snarky-comments•6m ago•0 comments

Doom: The Gallery Experience

https://www.newgrounds.com/portal/view/960452
1•razodactyl•6m ago•0 comments

Show HN: 100kb-SDK – Client-side WASM image and PDF optimizer to cut S3 bills

https://www.100kb.in/en/developer
1•Abhishek_6277•7m ago•0 comments

Show HN: Gittins, an online bandit engine that enforces log correctness

https://www.getgittins.dev
1•maxpagels•10m ago•0 comments

Commodore 64 Hardware Simulator

https://github.com/antirez/c64-hw-simulator
1•erickhill•14m ago•0 comments

List of predictions for autonomous Tesla vehicles by Elon Musk

https://en.wikipedia.org/wiki/List_of_predictions_for_autonomous_Tesla_vehicles_by_Elon_Musk
2•giuliomagnifico•15m ago•0 comments

Show HN: Online Piano – Play a Free Virtual Piano Keyboard

https://urpiano.com/
2•artiomartiom•16m ago•0 comments

Zeabur discontinues AI Hub after its August security breach

https://zeabur.com/changelogs/aihub-shutdown
1•iamsyr•19m ago•0 comments

Trump Signs Order Exempting Russia from Sanctions Law

https://www.nytimes.com/2026/10/16/us/politics/trump-order-russia-sanctions.html
4•jacquesm•20m ago•0 comments

Nvidia-Nemotron-Labs-Dory1.0-4B-NVFP4

https://huggingface.co/nvidia/NVIDIA-Nemotron-Labs-Dory1.0-4B-NVFP4
1•fprog•23m ago•1 comments

"In every study that considered the question"

https://unsung.aresluna.org/in-every-study-that-considered-the-question/
3•zdw•25m ago•0 comments

Lithos-metal: Qwen3.8-27B on 40-core M5 Max at 168 tokens/s

https://github.com/lithos-ai/lithos-metal
1•emp_•27m ago•0 comments

The Criminal Behind Los Angeles' Griffith Observatory

https://www.popsci.com/science/griffith-observatory-founder-criminal/
1•gmays•30m ago•0 comments

Show HN: Guaranteed weight loss or gain within 2-3 weeks without GLPs

https://play.google.com/store/apps/details?id=com.macrocodex.app&hl=en_US
1•faangguyindia•30m ago•0 comments

Liquid Transmitter

https://www2.oberlin.edu/physics/catalog/demonstrations/waves/liquidtransmitter.html
2•rickcarlino•36m ago•1 comments

AI engineers became hot property. Now they're targets for seduction

https://economictimes.indiatimes.com/ai/ai-insights/ai-engineers-became-hot-property-now-theyre-t...
1•snarky-comments•38m ago•0 comments

The Theory of Psycho-Intellectual and Silic-Intellectual Duality

https://zenodo.org/records/23329798
1•KuriousWonder•41m ago•0 comments

Israeli firm used ads to enable espionage, Canadian researchers say

https://www.cbc.ca/news/world/israeli-firm-targeted-ads-espionage-9.7381922
2•snarky-comments•45m ago•1 comments

DeepSeek v4.1 flash on OpenCode pretty good

https://github.com/aditauqir/shev
3•skmpe•46m ago•0 comments

AI is driving a boom in modestly successful software projects

https://www.seangoedecke.com/ai-is-driving-a-boom-in-modestly-successful-software/
2•gpi•46m ago•0 comments

Show HN: I deployed a Prolog WAF on a free-tier GCP instance with only 1 GB RAM

https://prologwaf.site/
2•lokinpendawa•47m ago•0 comments

Marble Skill Taxonomy – Everything a child learns

https://withmarble.com/curriculum/
2•aratahikaru5•57m ago•1 comments

Show HN: AI agent follows instructions you never approved

https://github.com/Paraphern/rugsnare/blob/main/docs/blog/2026-10-17-mcp-contract-drift.md
1•paraphern•1h ago•0 comments

Alef Aeronautics Flying Car [video]

https://www.youtube.com/watch?v=stmWapR3CWY
2•enjoyyourlife•1h ago•0 comments

ZLIB-TURBO: Zlib, faster, and byte for byte the same

https://github.com/icodywu/zlib-turbo
1•powturbo•1h ago•1 comments

Paper Instruments: Open-source frontier models for knowledge work

https://www.paperinstruments.com
1•handfuloflight•1h ago•0 comments

Every game of chess ends prematurely

https://www.infinitelymore.xyz/p/chess-games-end-one-move-early
1•FillMaths•1h ago•1 comments

Single Button, Handheld Gaming Console

https://hackaday.com/2026/10/14/single-button-handheld-gaming-console/
1•andsoitis•1h ago•0 comments

Oldest shipwreck found off Kekova Island in Turkey

https://www.bbc.com/news/articles/c6gr80rk1yyko
2•gmays•1h ago•0 comments