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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!

Tech volatility hits highest since dot-com bust next to S

https://fortune.com/2026/07/07/tech-volatility-hits-highest-since-dot-com-bust-sp-500/
1•1vuio0pswjnm7•46s ago•0 comments

Mercor acquires Deeptune to build AI training environments

https://www.mercor.com/blog/mercor-to-acquire-deeptune/
1•doppp•6m ago•0 comments

UN digital tech agency launches initiative to improve trust in AI agents

https://www.reuters.com/legal/litigation/un-digital-tech-agency-launches-initiative-improve-trust...
1•giuliomagnifico•6m ago•0 comments

China's public QR codes are being hijacked to redirect users to porn and scams

https://www.sixthtone.com/news/1018752/ScanScam:CriminalsRedirectChina’sPublicQRCodestoPorn
1•whiteblossom•6m ago•0 comments

Jukebox: Themes inspired by music cover art

https://github.com/nooneknowspeter/jukebox
1•nooneknowspeter•6m ago•0 comments

Counting ArXiv Delays

https://fi-le.net/arxiv/
1•fi-le•11m ago•0 comments

China recovers Long March 10B rocket

https://www.bilibili.com/video/BV1n6NL6fEP9
2•ycui7•14m ago•1 comments

OpenAI and Google sell AI models to blacklisted China groups

https://www.ft.com/content/5d6aafa1-5d47-4585-aa95-6ec06a6cd20f
1•JumpCrisscross•14m ago•0 comments

China recovers reusable rocket used in the maiden launch of Long March 10B

https://www.scmp.com/news/china/science/article/3360069/china-recovers-long-march-10b-reusable-ro...
3•yms_hi•16m ago•0 comments

Think you can win on prediction markets? Here's why you're more likely to lose

https://www.cbc.ca/news/business/prediction-market-skilled-traders-9.7258090
2•1vuio0pswjnm7•18m ago•0 comments

I wrote about how we used Conway's Law to fix legacy architecture

https://one2n.io/blog/fixing-legacy-architectures-with-conways-law
1•chinmay185•22m ago•1 comments

"Worthless Idiot, Donkey Head": Parodies of Pedantry on the Renaissance Stage

https://publicdomainreview.org/essay/parodies-of-pedantry/
1•lermontov•25m ago•0 comments

Formally Verifying AI-Generated GPU Kernels

https://gimletlabs.ai/blog/formally-verifying-ai-generated-kernels
2•matt_d•25m ago•0 comments

Why is music so much easier for AI than code?

1•htlemur_bobby•26m ago•1 comments

Florida's OpenAI lawsuit moves to federal court, gets assigned to Aileen Cannon

https://www.politico.com/news/2026/07/08/floridas-openai-lawsuit-federal-court-aileen-cannon-0099...
1•1vuio0pswjnm7•35m ago•0 comments

Controlling the Human Body via EMS

https://github.com/danielkaijzer/Human-Operator
1•kaonwarb•36m ago•0 comments

Ask HN: MCP Native Tools?

2•edifil•37m ago•2 comments

NEO's Hands – An API to the Physical World

https://www.1x.tech/discover/neos-hands
2•dsr12•38m ago•0 comments

Sheaf theory: from deep geometry to deep learning (2025)

https://arxiv.org/abs/2502.15476
1•measurablefunc•40m ago•0 comments

Clamshell style cyberdeck built around the Raspberry Pi Compute Module 5

https://github.com/sb-ocr/cmdeck
1•tortilla•42m ago•0 comments

OpenAI unveils long-awaited "super app" as rivalry with Anthropic intensifies

https://www.reuters.com/business/openai-launches-chatgpt-work-2026-07-09/
1•adithyaharish•46m ago•0 comments

Migrating Code by Proof: From F# to Python

https://www.logosresearch.ai/news/migrating-code-by-proof/
1•peterkelly•47m ago•0 comments

Paranoid LLMs

https://whyjay.vercel.app/thoughts/paranoid-llms/
1•juggy69•47m ago•0 comments

Show HN: R3 – A Local Code Review Tool for You and Your AI Agent

https://github.com/hyperlogue/r3
1•rickye26•50m ago•0 comments

What Happened to Commodore? Why the Amiga Disappeared

https://www.youtube.com/watch?v=IXitMm7aeV8
2•cable2600•51m ago•0 comments

Earliest example of right-handedness found in Australian fossils

https://www.cnn.com/2026/07/09/science/earliest-animal-right-handedness-spriggina-floundersi
1•Tomte•52m ago•0 comments

Data Science Weekly – Issue 659

https://datascienceweekly.substack.com/p/data-science-weekly-issue-659
1•sebg•57m ago•0 comments

Brave Bat Roadmap 4.0

https://brave.com/blog/bat-roadmap-4-0/
1•twapi•1h ago•0 comments

The most, and least, liveable cities in 2026

https://www.economist.com/graphic-detail/2026/07/06/the-worlds-most-and-least-liveable-cities-in-...
2•andsoitis•1h ago•1 comments

Can you run every line of code in Super Mario Bros.?

https://www.youtube.com/watch?v=o0gOALTvkcc
1•badc0ffee•1h ago•0 comments