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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!

Artery Embolization W Resorbable Gelatin Microspheres in Osteorthritic Knee Pain

https://pubs.rsna.org/doi/10.1148/radiol.253312
1•bookofjoe•2m ago•0 comments

Anthropic "pauses" token-based billing for its Claude Agent SDK

https://arstechnica.com/ai/2026/06/anthropic-pauses-token-based-billing-for-its-claude-agent-sdk/
1•mikhael•2m ago•0 comments

How I Work from Anywhere Without Losing My Place

https://micro.webology.dev/2026/06/13/how-i-work-from-anywhere/
1•speckx•3m ago•0 comments

AURpocalypse now: a look at the recent AUR attacks

https://lwn.net/SubscriberLink/1077619/f7b07c5489fdd43a/
1•jwilk•3m ago•0 comments

Show HN: No-install, end-to-end encrypted HTML artifact sharing for agents

https://askhuman.app/
1•rvcdbn•7m ago•0 comments

Repo-Jacking Anthropic's Claude Community Plugins (and the SHAs That Saved Them)

https://johnstawinski.com/2026/06/18/repo-jacking-anthropics-claude-community-plugins-and-the-sha...
1•cyberbender•7m ago•0 comments

The False Sense of Productivity

https://blog.ngxson.com/the-false-sense-of-productivity
1•ngxson•7m ago•0 comments

Experiments with Scripting and User-Interface Languages (1998)

https://web.archive.org/web/20070210194816/http://inferno.bell-labs.com/cm/cs/who/bwk/interps/pap...
1•tosh•7m ago•0 comments

MiniMax M3 vs. GLM 5.2: Codegen comparison across autonomous coding tasks

https://thinkwright.ai/minimax-m3-vs-glm-5-2-coding-benchmark
1•oceanwaves•9m ago•1 comments

Show HN: Find the right stack for your AI use case

https://inferlay.com/
1•ibbie•13m ago•0 comments

Turn Citi Bike receipt emails into Strava rides, with the real route

https://github.com/erikleon/citibike2strava
2•ekarwatowski•13m ago•0 comments

MCP isn't dead: the 'MCP is dead' wave measures the wrong axis

https://prashamhtrivedi.in/mcp-isnt-dead/
1•prash2488•14m ago•0 comments

The noisy neighbor problem: serving LLMs

https://cohere.com/blog/serving-fairness
1•_josh_meyer_•15m ago•0 comments

Why Temporal Isn't Enough

https://www.diagrid.io/blog/verifiable-execution-lineage-agent-workflows
1•yaronsc•16m ago•0 comments

PhD_fleet – Manage a virtual research lab of AI PhD students via Slack

https://github.com/canatara/phd_fleet
1•canatara•16m ago•1 comments

Basic Markdown Syntax Guide

https://www.markdownguide.org/basic-syntax/
1•nanfinitum•17m ago•0 comments

I'd like to sell my time today

https://based.press/e/i-d-like-to-sell-my-time-today-ua8c1a8/
1•pro_methe5•17m ago•0 comments

AI-gateway product that cuts LLM API TOKEN costs by 40-70%

1•arnab777•17m ago•0 comments

DiffsHub: View code changes from any public GitHub diff with a freaking-fast UI

1•maxloh•17m ago•1 comments

Code Is Not a Product, Product Is Not a Startup

https://pawelbrodzinski.substack.com/p/code-is-not-a-product-product-is
1•flail•23m ago•0 comments

Microsoft Shareholders Sue over $357B Stock Wipeout

https://www.gadgetreview.com/microsoft-shareholders-sue-over-357-billion-stock-wipeout
3•speckx•24m ago•0 comments

Manna announces 'strategic pause' that grounds drone deliveries in Ireland

https://www.irishtimes.com/business/2026/06/19/manna-announces-strategic-pause-that-grounds-drone...
1•trusche•27m ago•0 comments

How I turned World Cup data into posters

https://zehfernandes.com/posts/how-i-turned-world-cup-data-into-posters
1•zehfernandes•27m ago•1 comments

Open-source AI skills that make Claude/ChatGPT produce real work, eval-scored

https://github.com/mohitagw15856/pm-claude-skills
1•mohitagw•27m ago•0 comments

A Shallow Introduction to the K Programming Language (2002)

https://web.archive.org/web/20070519112242/http://www.kuro5hin.org/story/2002/11/14/22741/791
1•tosh•27m ago•0 comments

Show HN: Intelligrade – EU Based Digital Exams

https://www.intelligrade.de/en
1•Escapado•28m ago•0 comments

Balsamiq Turns 18

https://e.customeriomail.com/deliveries/dgTrwgsDAKuYBqqYBgGe3uUDTbaOe6hHejNN_78=
2•constantinum•29m ago•0 comments

Show HN: StartupsBR – A Map of Brazilian Startups

https://www.startupsbr.com/sao-paulo
1•leonagano•29m ago•0 comments

Amazon Studios Won't Release Movie It Made That Makes Tech Billionaires Look Bad

https://www.showbiz411.com/2026/06/19/jeff-bezoss-amazon-studios-wont-release-movie-it-made-about...
3•harambae•29m ago•0 comments

LeCun blasts Musk's xAI as 'failure,' labs are risking a 'big bubble explosion'

https://www.cnbc.com/2026/06/18/yann-lecun-elon-musk-xai-failure-ai-labs-bubble-risk.html
1•1vuio0pswjnm7•30m ago•0 comments