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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!

Postgres got group commit by deleting most of the patch

https://frn.sh/pgfsync/
1•paperwhitez•54s ago•0 comments

We blind-tested ChatGPT, Claude, and Gemini on 20 everyday tasks (Open Dataset)

https://dailyskill.ai/ai-benchmark-2026/
1•dubaimark•7m ago•0 comments

Maven Robotics wants to steal your robot deployment deal

https://techcrunch.com/2026/09/10/maven-robotics-wants-to-steal-your-robot-deployment-deal/
1•soltanov•7m ago•0 comments

Ask HN: What's a good "semi-dumb" phone/watch for kids?

1•funkaster•8m ago•0 comments

Anthropic reveals rogue AI agents hate CAPTCHAs

https://techcrunch.com/2026/09/10/anthropic-reveals-rogue-ai-agents-hate-captchas-just-like-you/
1•soltanov•9m ago•0 comments

Google Launches Meridian GeoX Globally

https://developers.google.com/meridian/geox
1•soltanov•12m ago•0 comments

OpenAI agents attacked RubyGems back in May

https://simonwillison.net/2026/Sep/12/openai-agents-rubygems/
2•lumpa•17m ago•0 comments

How the U.S. Space Force Is Used in Wars Today [video]

https://www.youtube.com/watch?v=RGcRuej-LVE
1•handfuloflight•18m ago•0 comments

Show HN: Menu Hub – a native macOS menu bar manager in SwiftUI/AppKit

https://github.com/Talljack/menu-hub/releases/tag/v0.1.5
1•talljack•22m ago•0 comments

notatallshaw/nab: PubGrub-based dependency resolver for Python packages

https://github.com/notatallshaw/nab
2•Ravencentric•29m ago•1 comments

A method for finding interrelations bethween constants of physics and maths

https://sinscienceandspirituality.blogspot.com/2018/05/the-joys-of-reverse-polish-notation.htm
1•djbarrow•31m ago•0 comments

Pacman AI framework for controlling fusion systems safely makes key decisions

https://www.pppl.gov/news/2026/pacman-ai-framework-controlling-fusion-systems-safely-makes-key-de...
1•o4c•33m ago•0 comments

US lawmakers urge secretive British court to open up about Apple case

https://www.theguardian.com/us-news/2026/sep/11/congress-uk-court-apple-encrypted-data-case
1•CGMthrowaway•33m ago•0 comments

Handshake, not a drug deal? San Francisco police drone case falls apart

https://missionlocal.org/2026/08/sfpd-drone-arrest-charges-dismissed-rtic/
1•aray07•33m ago•0 comments

Why AI chatbots make bad tutors

https://www.heyaristotle.com/blog/why-ai-chatbots-make-bad-tutors
1•rshanreddy•36m ago•0 comments

Nobody Believes It, Everybody Does It

https://blog.jim-nielsen.com/2026/nobody-believes-it-everybody-does-it/
1•aray07•38m ago•0 comments

How good are LLMs at porting software in 2026?

1•estranhosidade•38m ago•0 comments

This is the world's cheapest SOLAR CAR [video]

https://www.youtube.com/watch?v=Hk6aTKV-des
1•thunderbong•40m ago•0 comments

2026 January to May List of LLM Research Papers: Sebastian Raschka

https://magazine.sebastianraschka.com/p/llm-research-papers-2026-part1
1•Alien1Being•43m ago•0 comments

Usenet rewind archive search engine

https://www.usenet-rewind.com/
9•cstadler1869•44m ago•1 comments

Why the AI race has its creators fearing human extinction

https://www.ft.com/content/b7fe0fe0-0463-4f55-9590-0a7d08d8fe66
1•nprateem•44m ago•0 comments

Show HN: NodehistJ – FTN Nodelist Server

https://github.com/oldzoomer-ru/nodehistj
1•oldzoomer•47m ago•2 comments

AI Kills Everybody or Doomer Psyop? (All in Podcast)

https://www.youtube.com/watch?v=cvxjqbfLVk0
1•mudil•50m ago•0 comments

Ask HN: What do you do about API keys?

1•stickynotememo•52m ago•1 comments

Building Specialized Systems We Can Trust with Agents

https://skydiscover-ai.github.io/blog-skysynth.html
1•matt_d•52m ago•0 comments

Clay Mathematics Institute on the Navier-Stokes Problem

https://www.claymath.org/news/navier-stokes-announcement/
7•rvz•54m ago•1 comments

Szmalcownik

https://en.wikipedia.org/wiki/Szmalcownik
1•firefax•58m ago•1 comments

Vulnerability in balcony solar panel inverter (de)

https://www.ccc.de/updates/2026/blinkenlights-hoymiles
3•yitchelle•1h ago•0 comments

Assessing the Evolving Global Competitiveness of the US Auto Industry

https://itif.org/publications/2026/03/23/assessing-evolving-global-competitiveness-of-us-auto-ind...
1•toomuchtodo•1h ago•0 comments

CascadeLUT: Info.-Ordered Streaming Inference for Bandwidth-Constrained FPGAs

https://arxiv.org/abs/2608.00720
1•matt_d•1h ago•0 comments