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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!

Reddit Launching Video Comments Feature

https://old.reddit.com/r/modnews/comments/1tpa9p1/launching_video_in_comments/
1•CM30•1m ago•0 comments

The Dark Matter of Software

https://99fires.substack.com/p/the-dark-matter-of-software
1•jplata•1m ago•0 comments

Look Ma No HTTP_proxy

https://slicervm.com/blog/look-ma-no-proxy/
1•alexellisuk•4m ago•0 comments

AnthropoSprawl: Timeline map of historical photos from pastvu.com

https://anthroposprawl.eamag.me/
1•eamag•4m ago•0 comments

Protecting customers through Coordinated Vulnerability Disclosure

https://www.microsoft.com/en-us/msrc/blog/2026/05/a-shared-responsibility-protecting-customers-th...
1•ledoge•7m ago•0 comments

Universal transcriptomic hallmarks of mammalian ageing and mortality

https://www.nature.com/articles/s41586-026-10542-3
1•bookofjoe•7m ago•0 comments

US DOJ opens criminal inquiry into E Jean Carroll

https://www.theguardian.com/us-news/2026/may/27/trump-doj-investigation-e-jean-carroll
2•root-parent•8m ago•0 comments

VPNs Are Not a 'Threat'

https://www.techradar.com/vpn/vpn-privacy-security/vpns-are-not-a-threat-industry-hopes-for-an-ev...
2•01-_-•8m ago•0 comments

Wiki Workers United

https://meta.wikimedia.org/wiki/Wiki_Workers_United
1•Tomte•8m ago•0 comments

I cut my AI API costs 99% by switching from Claude to DeepSeek

https://twitter.com/kevinsays/status/2059724146221662339
1•agentbc9000•8m ago•0 comments

Show HN: Roar – A macOS CLI tool for notifications

https://github.com/dalemyers/Roar
1•dalemyers•9m ago•0 comments

SurrealDB 3.1: stability, DiskANN, and a new release process

https://surrealdb.com/blog/surrealdb-3-1-stability-diskann-and-a-new-release-process
1•itsezc•10m ago•0 comments

Show HN: Local Coding Agent with LLMs to Delegate Tool Calls to Small AI Models

https://github.com/district-solutions/open-agent-tools-coder
1•dsdevjay•10m ago•0 comments

Reticulum is the cryptography-based networking stack for building networks

https://reticulum.network/
2•janandonly•12m ago•0 comments

Is AI Inherently Anti-Social?

https://battellemedia.com/archives/2026/05/is-ai-inherently-anti-social
1•thm•12m ago•0 comments

Stream Plumbing in Embedded Systems

https://gist.github.com/mickjc750/556fa3b6bb62f383ff2b4b6b99d84faa
1•mickjc750•13m ago•1 comments

Composer 2.10 Release features automatic malware blocking

https://blog.packagist.com/composer-2-10-release/
2•Seldaek•14m ago•1 comments

Why Tesla's AI trainers don't trust its self-driving tech – or its safety stats

https://www.reuters.com/investigations/why-teslas-ai-trainers-dont-trust-its-self-driving-tech-or...
2•puzzlingcaptcha•14m ago•0 comments

What can running wearables data tell you about biomechanical training load?

https://runningwritings.com/2026/05/rundynamics-stryd-biomechanical-loads.html
1•broccolijosh•15m ago•0 comments

Apostrophe and Quotes

https://orchidfiles.com/apostrophe-and-quotes/
1•theorchid•15m ago•0 comments

Google engineer charged with insider trading after making $1.2M on Polymarket

https://techcrunch.com/2026/05/27/google-engineer-charged-with-insider-trading-after-making-1-2m-...
2•Chazprime•16m ago•0 comments

Turning Claude Code hooks into a live racing dashboard

https://github.com/sembsa/claude-code-race
2•sembsa•17m ago•1 comments

Nvidia Dynamo Snapshot: Fast Startup for Inference Workloads on Kubernetes

https://developer.nvidia.com/blog/nvidia-dynamo-snapshot-fast-startup-for-inference-workloads-on-...
1•victormustar•17m ago•0 comments

Tech Layoffs 2026 Update

https://tech.yahoo.com/general/article/tech-layoffs-2026-update-over-142000-people-have-been-laid...
2•01-_-•20m ago•0 comments

Claude Code Rendering Elvish

https://github.com/anthropics/claude-code/issues/63096
3•sammelaugust•22m ago•2 comments

AIs don't like religion – particularly Jehovah's Witnesses, study claims

https://www.theregister.com/ai-ml/2026/05/27/ais-dont-like-religion-particularly-jehovahs-witness...
2•pseudolus•25m ago•0 comments

50k Spam Emails and 3am Panic: What Happened When I Forgot About a Side Project

https://danielpetrica.com/50-000-spam-emails-and-a-3-am-panic-what-happened-when-i-forgot-about-a...
1•shaunpud•28m ago•0 comments

SpaceX has almost finished writing v1.0 of an in-house AI training stack in C

https://twitter.com/elonmusk/status/2059884150187053488
3•tosh•28m ago•0 comments

Ukraine to procure Swedish fighter jets

https://www.government.se/press-releases/2026/05/ukraine-to-procure-swedish-fighter-jets/
4•madspindel•28m ago•0 comments

Dr. Z's Opinions

https://sites.math.rutgers.edu/~zeilberg/OPINIONS.html
1•ethanlipson•30m ago•0 comments