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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!

The Death of Richard Dawkins

https://steve-yegge.medium.com/the-death-of-richard-dawkins-f5d6e8f43d07
1•lawrenceyan•2m ago•0 comments

Show HN: Beats, a web-based drum machine

https://beats.lasagna.pizza
2•kinduff•4m ago•0 comments

Don't Lie

https://notes.philippdubach.com/0007
2•7777777phil•6m ago•0 comments

Police Invested Millions in Shadowy Phone-Tracking Software Won't Say How Used

https://www.texasobserver.org/texas-police-invest-tangles-sheriff-surveillance/
4•nobody9999•9m ago•2 comments

Agents Should Write Code, Not JSON

https://blog.sshh.io/p/building-multi-agent-systems-part-c0c
1•sshh12•9m ago•1 comments

The way I run standup meetings (2024)

https://marcgg.com/blog/2024/11/20/standup/
1•BerislavLopac•10m ago•0 comments

I vibecoded my way into the #1 position on the Highload.fun leaderboard

https://josusanmartin.com/blog/2026/01/18/the-game-has-changed-vibecoded-highload.html
1•josu•10m ago•0 comments

Simulating the Ladybug Clock Puzzle

https://austinhenley.com/blog/ladybugclock.html
1•ibobev•11m ago•0 comments

Writing an LLM from scratch, part 31 – the models are now on Hugging Face

https://www.gilesthomas.com/2026/01/llm-from-scratch-31-models-on-hugging-face
1•ibobev•11m ago•0 comments

I created a game engine for Django?

https://en.andros.dev/blog/6e9e4485/i-created-a-game-engine-for-django/
1•ibobev•12m ago•0 comments

ISS SOS: The plan to leave a doomed space station – quickly

https://www.bbc.com/future/article/20260115-how-do-you-evacuate-a-space-station
1•breve•15m ago•0 comments

Switch Join: PostgreSQL that adapts on the fly

https://alenarybakina.substack.com/p/switch-join-postgresql-that-adapts
1•tanelpoder•16m ago•0 comments

The Advanced Matrix Factorization Jungle

https://igorcarron.github.io/welcome-to-the-matrix-factorization-jungle/
2•jjgreen•17m ago•0 comments

Apple parental controls have more holes than Swiss cheese

https://twitter.com/MichaelErmer_/status/2012515535326527740
4•michaelermer•18m ago•0 comments

Thoughts and Observations Regarding Apple Creator Studio

https://daringfireball.net/2026/01/thoughts_and_observations_regarding_apple_creator_studio
3•k2enemy•20m ago•0 comments

Stirling Cycle Machine Analysis

https://ohioopen.library.ohio.edu/opentextbooks/9/
4•akshatjiwan•28m ago•0 comments

The AI Trap That Is Quietly Wiping Out Investors

https://substack.com/inbox/post/184956334
3•rafaepta•31m ago•1 comments

Show HN: Dock – Slack minus the bloat, tax, and 90-day memory loss

https://getdock.io/
2•yadavrh•31m ago•1 comments

The Future of AI Development Isn't a New IDE

https://docs.overcut.ai/blog/the-real-future-of-ai-development
1•yuvalhazaz•35m ago•0 comments

Show HN: HakHok

https://hakhok.replit.app/
1•sharjeel•35m ago•0 comments

The Agentic Software Development Lifecycle

https://docs.overcut.ai/blog/the-agentic-software-development-lifecycle
1•yuvalhazaz•35m ago•0 comments

Show HN: Stop manually syncing rules between Claude, Cursor, and Codex

https://github.com/nanxiaobei/ai-global
1•nanxiaobei•36m ago•0 comments

Which countries are adopting AI the fastest?

https://www.economist.com/graphic-detail/2026/01/12/which-countries-are-adopting-ai-the-fastest
2•gmays•37m ago•1 comments

Boston, NYC, Washington DC Guide

https://lopespm.com/notes/2026/01/18/nyc_boston_dc.html
1•lopespm•39m ago•0 comments

Show HN: VPNBypass – macOS menu bar app to route domains around your VPN

1•geiser•41m ago•0 comments

Bridging Bitchat and MeshCore

https://juraj.bednar.io/en/blog-en/2026/01/18/bridging-bitchat-and-meshcore-resilient-communicati...
1•hyzyla•41m ago•0 comments

psmux: Terminal multiplexer for Windows – tmux alternative

https://github.com/marlocarlo/psmux
1•curioussquirrel•42m ago•0 comments

Childhood Neighbors Influence Occupation Choice [pdf]

https://www.econ.queensu.ca/sites/econ.queensu.ca/files/neighbors_occupations_AHPW_aug1_2025.pdf
4•7777777phil•44m ago•3 comments

Ask HN: Predictions for New GTLDs in 2026?

1•cyode•45m ago•0 comments

An Introduction to Orthic

https://mutsumino.neocities.org/scripts/orthic
1•helterskelter•48m ago•0 comments