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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•7mo 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!

Notes on Agentic Programming

https://blog.valentin.sh/llm-coding/
1•foobuzzHN•4m ago•0 comments

NextPath Mag: How did the industry get into this mess?

https://robbygrodin.substack.com/p/how-did-the-industry-get-into-this
1•code_pig•7m ago•0 comments

FBI Response to Minnesota Fraud Allegations

https://www.axios.com/2025/12/29/nick-shirley-minnesota-fraud-vance-fbi-somali
3•Geonode•8m ago•0 comments

Tesla's 4680 battery supply chain collapses as partner writes down deal by 99%

https://electrek.co/2025/12/29/tesla-4680-battery-supply-chain-collapses-partner-writes-down-dea/
12•coloneltcb•9m ago•0 comments

China wants to ban making yourself into an AI to keep aged relatives company

https://www.theregister.com/2025/12/29/asia_tech_news_roundup/
2•Bender•10m ago•0 comments

Bad Wi-Fi at home? Try my 10 go-to ways to fix your internet this weekend

https://www.zdnet.com/home-and-office/networking/bad-wifi-10-fixes-for-better-internet/
1•CrankyBear•12m ago•0 comments

'NCIS' Actress Katrina Law Accuses Her Ex of Using AI to Impersonate Her

https://www.sanluisobispo.com/entertainment/us-weekly/article314033495.html
1•Bender•12m ago•0 comments

Oliver Byrne's "The Elements of Euclid", First Six Books [pdf]

https://proyectodescartes.org/revista/Numeros/Revista_3_2022/docs/byrne_context.pdf
4•ogogmad•14m ago•3 comments

Bloom Filters

https://arpitbhayani.me/blogs/bloom-filters/
1•bisgautam•14m ago•0 comments

Show HN: MCP-Reddit – Reddit scraper for Claude, no API keys needed

https://pypi.org/project/mcp-reddit/
1•namanajmera•15m ago•1 comments

China drafts strictest rules to end AI-encouraged suicide, violence

https://arstechnica.com/tech-policy/2025/12/china-drafts-worlds-strictest-rules-to-end-ai-encoura...
1•Bender•17m ago•0 comments

Ask HN: In the real world we pay for everything so why not software?

1•asim•20m ago•1 comments

The Enshittifinancial Crisis

https://www.wheresyoured.at/the-enshittifinancial-crisis/
5•spking•21m ago•1 comments

Show HN: Neko.js, a recreation of the first virtual pet

https://louisabraham.github.io/nekojs/
1•Labo333•22m ago•0 comments

About Architecting and running modern IT Infrastructure in Trains [video]

https://media.ccc.de/v/denog17-78243-you-can-t-just-model-a-train-in-netbox-about-architecting-an...
1•doener•22m ago•0 comments

The Lure of a Rising Asian Metropolis? No Traffic

https://www.nytimes.com/2025/12/28/world/asia/indonesia-nusantara-future-capital.html
1•paulpauper•22m ago•1 comments

EVPN Flex Cross Connect – L2 P2P VPNs can be agile as well [video]

https://media.ccc.de/v/denog17-75209-evpn-flex-cross-connect-l2-p2p-vpns-can-be-agile-as-well
1•doener•23m ago•0 comments

Medical Breakthroughs from 2025

https://www.scientificdiscovery.dev/p/medical-breakthroughs-in-2025
2•paulpauper•23m ago•0 comments

Exposing a $10B Debt Industry [video]

https://www.youtube.com/watch?v=hBNWInRS6hM
2•paulpauper•23m ago•0 comments

The Impact of the Digital Market Act on Free Software [video]

https://media.ccc.de/v/2025-11-15-free-software-and-platform-regulation
2•doener•23m ago•0 comments

Show HN: Gemini has a "Concrete Bias" against minimalist software (Basecamp vs

https://www.genrankengine.com/blog/concrete-bias-in-llms/
2•arunkumars91•25m ago•1 comments

Show HN: Mini tool helped me to get a dream dev job (can help you too)

1•ilyasseisov•27m ago•0 comments

Static News - A static archive of Hacker News right in your browser

https://57a1da90.static-news-dtg.pages.dev/
2•keepamovin•28m ago•1 comments

Got fired today because of AI. It's coming, whether AI is slop or not

https://old.reddit.com/r/webdev/comments/1py8ruu/got_fired_today_because_of_ai_its_coming_whether/
3•speckx•28m ago•0 comments

Show HN: UpDown – Simple website uptime monitoring

https://updown.fly.dev/
1•ejncman•29m ago•0 comments

Factory farming in Africa: development banks like it, but it's bad for climate

https://theconversation.com/factory-farming-in-africa-development-banks-see-it-as-a-good-idea-but...
2•PaulHoule•29m ago•1 comments

Propose, Solve, Verify: Self-Play Through Formal Verification

https://arxiv.org/abs/2512.18160
1•imakwana•31m ago•0 comments

Show HN: A solar system simulation in the browser

https://luna.watermelonson.com/
2•watermelonson•31m ago•0 comments

Parked Domain Girl

https://bookofjoe2.blogspot.com/?m=1
1•bookofjoe•32m ago•0 comments

Compiled Python Performance Comparison

https://dl.acm.org/doi/10.1145/3756681.3756972
1•igouy•32m ago•0 comments