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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!

The MustCreate Pattern for Go Tests

https://mtlynch.io/notes/go-must-create-pattern/
1•mtlynch•1m ago•0 comments

Harness adapters: Safe RL for efficient agentic development

https://huggingface.co/blog/harness-hub/harness-adapters
1•victormustar•1m ago•0 comments

Musk's Starlink Mobile plans to challenge AT&T, Verizon, T-Mobile

https://www.bloomberg.com/news/articles/2026-11-05/how-musk-s-starlink-can-challenge-at-t-verizon...
1•dvaplima•3m ago•0 comments

A sandbox to test how purchasing agents handle failed purchases

https://chargeback.cloudbotanist.ai/
1•mashavsl•4m ago•0 comments

LifeVal

https://openai.com/index/lifeval/
1•gmays•4m ago•0 comments

Public schools nationwide are facing a massive drop in student enrollment

https://www.npr.org/2026/11/06/nx-s1-5971283/public-school-enrollment-ice-deportation-birthrate
2•geox•4m ago•0 comments

Show HN: Upvoted – Up First but with HN stories

https://upvoted.dev/
1•cpan22•4m ago•0 comments

The Price of Personalization

https://bigbold.bearblog.dev/the-price-of-personalization/
2•afishinmymind•7m ago•0 comments

Half of Show HN posts are a bare link. Ones with 500 characters got 2x replies

https://ownfeed.dev/guides/show-hn-analysis-37622-posts
2•shun_dev•8m ago•1 comments

The Tesla Cybertruck Is Dead

https://www.thedrive.com/news/the-tesla-cybertruck-is-dead
3•speckx•8m ago•0 comments

Only today free language learning App with AI

https://apps.apple.com/fr/app/habla-learn-spanish-fast/id6783860670
1•brmmuhoil•9m ago•0 comments

Tesla to pull the plug on Cybertruck after years of poor sales

https://www.reuters.com/business/autos-transportation/tesla-wind-down-cybertruck-production-texas...
3•randycupertino•9m ago•1 comments

Turning the HEIC decoder into a SHA-256 computer

https://www.irisc2.com/blog/heic-hashquine
1•luispa•13m ago•0 comments

Canada's Deepest Cave Goes Deeper as Explorers Map New Passages

https://fernie.com/blog/canadas-deepest-cave-goes-deeper-as-explorers-map-new-passages/
1•cf100clunk•13m ago•0 comments

Ozempic-style drugs now in trials for heart failure, addiction and even aging

https://maccus.fr/en/ozempic-drugs-trials-beyond-diabetes/
1•randycupertino•14m ago•0 comments

Upgrading NetBSD from 11.0 to 11.1

https://www.dwarmstrong.org/netbsd-upgrade/
2•jaypatelani•16m ago•0 comments

Sony revives the original Walkman headphones, adds USB-C

https://arstechnica.com/gadgets/2026/11/sony-adds-usb-c-to-its-70s-era-mdr-3-walkman-headphones/
1•rawgabbit•16m ago•0 comments

Supercharging XLA-Based Inference: Announcing the Launch of XLA Serving Engine

https://opensource.googleblog.com/2026/11/supercharging-xla-inference-xla-serving-engine.html
1•fortran77•17m ago•0 comments

The Day a Test Deleted My Home Directory

https://lucianolupo.com/notes/The%20Day%20a%20Test%20Deleted%20My%20Home%20Directory
1•fortran77•18m ago•0 comments

GPTBot hit my SSO login page 594,101 times

https://www.shuffle-on.com/blog/ai-crawlers-read-my-site
1•lisneanucristia•18m ago•0 comments

Show HN: R/place for Git – Open-source Git server sustaining 567 pushes/s

https://reasonmachines.com/blog/aspen
1•svemyh•18m ago•0 comments

Limit what agents learn about private repos with enclaves

https://githubnext.com/posts/enclaves/
2•gmays•21m ago•0 comments

Show HN: DrawDock – Annotate Windows apps from an Android tablet

https://github.com/MikeCer/DrawDock
3•MikeCer•22m ago•0 comments

100% GPU Utilization, 39% of Rated FP16

https://medium.com/@AhmadBabaei/100-gpu-utilization-39-of-rated-fp16-ce97ba1b88f0
2•birdculture•22m ago•0 comments

I Spent $1000 Making LLMs Play Competitive Pokémon

https://blog.doubleword.ai/llms-play-pokemon
5•kkm•22m ago•1 comments

Quantity vs. Quality in Pottery is a lie

https://www.lesswrong.com/posts/LrAqM4bGmAoA79rP3/quantity-vs-quality-in-pottery-is-a-lie
3•luskira•27m ago•0 comments

Bitcoin++ privacy hackathon winner: BlackIce, distributed frost silent payments

https://btcpp.dev/seoul/hackathon/projects/33249dbf-181b-4cc6-9074-1a742f71cb60
2•not_nifty•28m ago•1 comments

Ask HN: What fun things to do with an iPhone 11?

2•wanderingpixel•29m ago•1 comments

Show HN: Current – Change control for AI agents (Elixir)

https://github.com/santosh79/current
2•santosh_ycomb•29m ago•0 comments

Don't Write Bugs

https://www.teamten.com/lawrence/programming/dont-write-bugs
2•ColinWright•30m ago•1 comments