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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!

Interpreting Pangram

https://lucumr.pocoo.org/2026/9/14/interpreting-pangram/
1•notracks•1m ago•0 comments

Tuning a Local Coding Agent: Oh My Pi and Qwen3.8-27B on Two RTX 3090s

https://doug.sh/posts/tuning-a-local-coding-agent-oh-my-pi/
1•dougcalobrisi•1m ago•0 comments

25 Years of Mass Surveillance Is Enough [Auth: Cindy Cohn; Bruce Schneier]

https://www.lawfaremedia.org/article/25-years-of-mass-surveillance-is-enough
1•mdp2021•2m ago•0 comments

Show HN: ScaleUp City Simulator

https://city.scaleupcto.com/
1•robotrobot•2m ago•0 comments

GDScript: The Good, Bad, and Ugly Parts

https://azhdarchid.com/gdscript-good-bad-ugly/
1•haeseong•2m ago•0 comments

The Misery of Mechanistic Interpretability: A Formal Perspective

https://arxiv.org/abs/2609.15533
1•sbulaev•3m ago•0 comments

Sievepad: Write and debug Sieve scripts in the browser

https://sievepad.com/
1•StalwartLabs•3m ago•1 comments

Migrata – declarative Postgres migrations using plain SQL as the source of truth

https://migrata.io/blog/meet-migrata
2•ndortega•5m ago•1 comments

Linux Doctor – read-only health checks that explain what's wrong

https://github.com/zShaD0w7x/linux-doctor
2•7sh1d0w7x•6m ago•0 comments

The Complete Guide to Codex

https://flaviocopes.com/codex/
2•ibobev•7m ago•0 comments

Show HN: Public Browser – a Chrome MCP server with ~40% fewer tool calls

https://github.com/Silbercue/public-browser
1•silbercue•7m ago•0 comments

We timed 65 DynamoDB PITR restores. You can't predict the 66th

https://www.thisandthat.chat/blog/how-long-a-dynamodb-restore-takes/
1•jreynar•7m ago•0 comments

AntFlow AI: Spec-Driven Agentic Development

https://geekyants.com/antflow-ai
1•Harish_0089•7m ago•0 comments

I fixed my DevOps mistakes with AI

https://flaviocopes.com/devops-mistakes-ai/
2•ibobev•7m ago•0 comments

Comparing Values with CSS Progress()

https://blog.master.dev/comparing-values-with-css-progress/
1•ibobev•8m ago•0 comments

OpenAI buys smartphone camera maker Glass Imaging for $300M

https://techcrunch.com/2026/09/14/openai-buys-smartphone-camera-maker-glass-imaging-for-300-milli...
3•myth_drannon•9m ago•0 comments

Computer, Call Jordan

https://calljordanmygrandsonjordan.com/
1•carlos-menezes•9m ago•0 comments

An Antifragile (Barbell) Education [pdf]

https://www.fooledbyrandomness.com/education.pdf
1•upxx•9m ago•0 comments

Suchir Balaji's Homepage

https://suchir.net/
3•Bluestein•10m ago•0 comments

Show HN: Whodis – Domain investigation suite (WHOIS, DNS, stack)

https://github.com/Alex9001/whodis
1•vedmed•10m ago•0 comments

Number of 100 year olds in Japan top 100k for first time

https://www.japantimes.co.jp/news/2026/09/15/japan/japan-centenarians-top-100000/
1•haunter•12m ago•1 comments

DeepSeek v4.1 Flash (518GB, 4-bit) on a 128GB MacBook: 2.7x prefill, 17 tok/s

https://github.com/argonautlabsai/argodrive
1•Argonautlabs•13m ago•0 comments

Data dive: The revolving door between Whitehall and big tech

https://www.computerweekly.com/news/366650387/Data-dive-The-revolving-door-between-Whitehall-and-...
1•beardyw•13m ago•0 comments

Fremont – hardware city interactive map

https://redskyforge.com/fremont/
1•davedx•14m ago•0 comments

GNU Coreutils 9.12 Released with Performance Optimizations

https://www.phoronix.com/news/GNU-Coreutils-9.12
1•joshcsimmons•14m ago•0 comments

1Password's AI patching benchmark is misleading

https://blog.trailofbits.com/2026/09/15/1passwords-ai-patching-benchmark-is-misleading/
1•darkamaul•16m ago•0 comments

CrofAI Is an OpenRouter Wrapper

https://kendell.dev/blog/crofaifalse/
1•alexandra_au•20m ago•1 comments

OpenAI Buys Startup Developing Smartphone Camera

https://www.wsj.com/tech/openai-buys-startup-developing-smartphone-camera-63590370
3•bookofjoe•21m ago•1 comments

Prompting tricks for using Claude Opus 5

https://www.hydrogen18.com/blog/prompting-tricks-for-claude-opus-5.html
1•sidewndr46•22m ago•1 comments

The new Go JSON API: twice as fast, or 1.5x slower?

https://lemire.me/blog/2026/08/
1•bucket2015•23m ago•0 comments