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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•8mo 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!

Build with Gemini 3 Flash, frontier intelligence that scales with you

https://blog.google/innovation-and-ai/technology/developers-tools/build-with-gemini-3-flash/
1•nnx•57s ago•0 comments

Chess engine, pt. 6: Neural-net evaluation

https://www.dogeystamp.com/chess6/
1•luu•5m ago•0 comments

The Signalflow concepts to learn, for easier charts, alerts

https://martincapodici.com/2026/01/24/the-signalflow-concepts-to-learn-for-easier-charts-alerts-a...
1•mcapodici•8m ago•0 comments

On Programming with Agents

https://zed.dev/blog/on-programming-with-agents
1•saurabh•10m ago•0 comments

Show HN: Orbit – Track "zombie loops" and cost-per-feature in AI agents

https://withorbit.io
1•harshit19932703•12m ago•0 comments

Nix Scripts

https://github.com/QuackHack-McBlindy/dotfiles
1•quackhack•14m ago•0 comments

Data Center Debate, with Philip Johnston (CEO of Starcloud) [video]

https://www.youtube.com/watch?v=0wBFNVEOlnU
1•T-A•15m ago•0 comments

Pigouvian Tax

https://en.wikipedia.org/wiki/Pigouvian_tax
1•nomilk•17m ago•0 comments

What's so special about the find of a Roman panther?

https://www.bbc.co.uk/news/articles/c17zp8pl0pjo
1•zeristor•24m ago•0 comments

A possible future architecture for decoupled GUIs

1•powerwordtree•27m ago•0 comments

Proptest: Property-based testing for Rust (inspired by Hypothesis)

https://github.com/proptest-rs/proptest
1•ThierryBuilds•27m ago•0 comments

A reference layout for Modular Monoliths in TypeScript

https://gist.github.com/ewaldbenes/a7879a187cedb47ed9744ad2929e5d79
1•ebenes•33m ago•0 comments

A self-hosted collaborative viewer for pathology slides (Rust and WebGL2)

https://github.com/PABannier/PathCollab
2•el_pa_b•35m ago•0 comments

NIST is rethinking its role in analyzing software vulnerabilities

https://www.cybersecuritydive.com/news/nist-cve-vulnerability-analysis-nvd-review/810300/
2•milkglass•35m ago•0 comments

On the Tragedy of "The Lost Physics Soul" and the Leap to Structure

https://old.reddit.com/r/prequantumcomputing/comments/1qip5xr/on_the_tragedy_of_the_lost_physics_...
1•bkaminsky•37m ago•0 comments

ast-grep: A CLI tool for code structural search, lint and rewriting

https://github.com/ast-grep/ast-grep
1•aragonite•38m ago•0 comments

Creating a Multi-Agent Tool

https://openagents.org/blog/posts/2026-01-10-walkthrough-creating-a-multi-agent-tool-with
1•snasan•38m ago•1 comments

Show HN: Gmn – A lightweight Gemini CLI in Go (68x faster startup)

https://github.com/tomohiro-owada/gmn
1•abalol•38m ago•0 comments

Garnet: High-performance Redis alternative from Microsoft

https://microsoft.github.io/garnet/
1•wiradikusuma•39m ago•0 comments

Making changing assumptions explicit during development

1•Tobiahao•42m ago•1 comments

I use AI DevKit to develop AI DevKit features

https://codeaholicguy.com/2026/01/24/i-use-ai-devkit-to-develop-ai-devkit-features/
1•hoangnnguyen•42m ago•0 comments

India offloads US bonds, piles up gold in pivot away from dollar assets

https://www.hindustantimes.com/business/india-offloads-us-bonds-piles-up-gold-in-pivot-away-from-...
2•koolhead17•47m ago•0 comments

Not Moaning about AI

https://gilest.org/notes/2026/not-moaning-ai/
1•mindracer•55m ago•0 comments

How Debt Bankrupted the British Empire, and Why America Is Walking the Same Path

https://nitishastra.substack.com/p/how-debt-bankrupted-the-british-empire
3•thisislife2•59m ago•0 comments

Couple Receive $200k Settlement After 'Pungent' Indian Food Complaint

https://www.nytimes.com/2026/01/23/us/palak-paneer-indian-food-racism-settlement.html
1•vinni2•1h ago•0 comments

Modetc: Move your dotfiles from kernel space

https://maxwell.eurofusion.eu/git/rnhmjoj/modetc
2•todsacerdoti•1h ago•0 comments

Gold and Silver Signal the End of American Financial Dominance

https://www.jezebel.com/gold-and-silver-signal-the-end-of-american-financial-dominance
1•thomassmith65•1h ago•1 comments

A 2026 calendar of City of London ceremonies

https://www.ianvisits.co.uk/articles/a-2026-calendar-of-city-of-london-ceremonies-87010/
1•zeristor•1h ago•0 comments

Shared Claude – A website controlled by the public

https://sharedclaude.com/
1•reasonableklout•1h ago•0 comments

The rice of Chinese Memory [video]

https://www.youtube.com/watch?v=qzfhhAfxK-A
1•the4anoni•1h ago•0 comments