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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!

Elephant-Goldfish Model (EGM)

https://github.com/google/elephant-goldfish-model
1•qainsights•14s ago•1 comments

Ask HN: Has a Software Engineering Career Lost a Lot of Respect?

1•karakoram•36s ago•0 comments

A neat trick I found for reusing physical memory

https://sebsite.pw/w/20260728-cow.html
1•ibobev•43s ago•0 comments

Day 2000 Doesn't Care How Fast You Shipped

https://www.syntasso.io/post/day-2000-doesn-t-care-how-fast-you-shipped
1•danielbryantuk•49s ago•0 comments

Ptrc: A pure integer framework for 100% deterministic generative art

https://github.com/GKW369/p-adic-takt-resonance-cosmology
1•GKW369-156•1m ago•0 comments

Image Blocks

https://glfmn.io/devlog/2026-10-23/
1•ibobev•3m ago•0 comments

Malaria Parasite Caught in the Act of Breaking and Entering

https://www.quantamagazine.org/malaria-parasite-caught-in-the-act-of-breaking-and-entering-20261023/
1•ibobev•3m ago•0 comments

Show HN: The Only Weather App You'll Ever Need

https://weatherhubapp.com/
1•15cats7•4m ago•1 comments

Benchmarking Multimodal Agents for Robot Use Across Diverse Tasks, Embodiments

https://arxiv.org/abs/2610.10409
1•devy•5m ago•0 comments

Choosing Addiction Treatment in New Jersey: What Families Should Know in 2026

https://www.northjersey.com/story/special/contributor-content/2026/10/05/choosing-addiction-treat...
2•rollinghillsnj•6m ago•0 comments

A Golden Age of Science Brought to You by the WH (Tyler Cowen Interview)

https://www.nytimes.com/2026/10/22/opinion/interesting-times-tyler-cowen-michael-kratsios.html
2•atlasunshrugged•7m ago•0 comments

Unstructured's New Models Outparse GPT-6, Claude and Gemini

https://unstructured.io/blog/unstructured-transform-faster-more-accurate-for-your-hardest-documents
1•lmarol12•7m ago•0 comments

Why a world without friction is a world without progress

https://aeon.co/essays/why-a-world-without-friction-is-a-world-without-progress
2•ersinesen•9m ago•1 comments

Dagger 1.0 Beta

https://dagger.io/blog/dagger-10-beta/
3•shykes•9m ago•0 comments

LLM Multi-Agent Systems Are Vulnerable to Herding and Runaway Cascades

https://arxiv.org/abs/2610.30769
1•ersinesen•11m ago•0 comments

Preliminary report on H5N1 highly pathogenic avian influenza in Utah mink

https://virological.org/t/preliminary-report-on-h5n1-highly-pathogenic-avian-influenza-in-utah-mi...
2•Guid_NewGuid•11m ago•0 comments

Show HN: Ts-polyglot – Call C/C++ or Rust functions directly from TypeScript

https://ts-polyglot.dev
1•emykhailenko•13m ago•0 comments

We gave an AI $100k to trade on leverage. Here's what it did

https://twitter.com/DeployFinance/status/2113642187074195945
1•bsv_gtd•14m ago•0 comments

Reforming English Spelling

https://blog.oup.com/2026/10/reforming-english-spelling/
1•jruohonen•17m ago•0 comments

We found 20 users within the first 10 minutes of launching using our own site

https://heardly.io/
1•samuelalubin•17m ago•0 comments

Ask HN: How do you get AI loops to converge?

2•outlore•17m ago•1 comments

Ruby RegEx could lead to RCE

https://www.ruby-lang.org/en/news/2026/10/23/regexp-fixes-for-gitlab-cves/
2•arlattimore•18m ago•0 comments

Cloudflare Is Having Issues

https://www.cloudflarestatus.com/incidents/sufgcbe8rrwt
5•palmeida•19m ago•0 comments

Agents fail like engineers, so I review them like engineers

https://blog.greenflagged.dev/posts/agents-fail-like-engineers/
5•Azkar•20m ago•0 comments

Show HN: Tagwall, a 1M-pixel canvas on 6 blockchains with no owner

https://tagwall.io
1•tagwall•20m ago•0 comments

Show HN: Anyone else frustrated with mermaid diagrams?

https://github.com/uberblick-ai/ablauf
1•bk-one•21m ago•0 comments

Show HN: A small audit script and config notes for the new PHP CVEs

https://github.com/mc493/php2shell-enterprise-hardening-cve-2026-109618-109619
1•mc493•22m ago•0 comments

Local AI Is Not as Private as You Think [video]

https://www.youtube.com/watch?v=3mx84MRj8lY
1•onemoresoop•23m ago•0 comments

XHToken/Spark-X2.6-4B

https://huggingface.co/XHToken/Spark-X2.6-4B
3•gmays•24m ago•0 comments

Moreutils: The utilities package every Unix/Linux/Mac OS developer should know

https://rentes.github.io/unix/utilities/2015/07/27/moreutils-package/
2•jcbhmr•26m ago•0 comments