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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!

Straussian Memes: A Lens on Techniques for Mass Persuasion

https://www.lesswrong.com/posts/CAwnnKoFdcQucq4hG/straussian-memes-a-lens-on-techniques-for-mass-...
1•kp1197•1m ago•0 comments

PNGine: A WebGPU shader portability engine

https://hugodaniel.com/posts/introducing-pngine/
1•ibobev•1m ago•0 comments

What I Read in 2025

https://srajagopalan.substack.com/p/what-i-read-in-2025
1•neehao•2m ago•0 comments

Cognitive Diagnosis Framework for Evaluating Financial Large Language Models

https://arxiv.org/abs/2508.13491
1•gmays•2m ago•0 comments

Show HN: I'm student building best AI slide designer

https://smallailab.vercel.app/
2•ihsanf•2m ago•0 comments

Rick Rubin taught me to be a better engineer

https://bytesizedchunks.net/blog/20260101/
1•mrdosija•2m ago•0 comments

Show HN: Hero section I've created for my landing page

https://typethink.ai
1•Yash16•8m ago•0 comments

"AI is just a tool," but is it really?

https://andyjarosz.substack.com/p/ai-is-just-a-tool-but-is-it-really
1•andyfilms1•9m ago•0 comments

BBR congestion control algorithm version 04

https://datatracker.ietf.org/doc/html/draft-ietf-ccwg-bbr-04
1•throwawaybutwhy•9m ago•0 comments

Why I'm Leaving Harvard

https://www.compactmag.com/article/why-im-leaving-harvard/
6•CGMthrowaway•10m ago•0 comments

Ask HN: In-person/hybrid vs. remote work: which is better for a startup?

1•bbsc•11m ago•1 comments

A Booze Ban Since the '50s Is Being Lifted in Saudi Arabia

https://www.wsj.com/world/middle-east/saudi-arabia-alcohol-ban-laws-d6f961de
2•JumpCrisscross•13m ago•0 comments

Cycling Game (Mini Neural Net Demo)

https://www.doc.ic.ac.uk/~ajd/Cycling/
3•ungreased0675•15m ago•1 comments

From Embodied AI Jailbreak to Remote Takeover of Humanoid Robots [video]

https://media.ccc.de/v/39c3-skynet-starter-kit-from-embodied-ai-jailbreak-to-remote-takeover-of-h...
1•addisaden•15m ago•0 comments

The Year the Newsletter Business Reached a Fever Pitch

https://www.wsj.com/business/media/the-year-the-newsletter-business-reached-a-fever-pitch-54a2a69e
1•JumpCrisscross•16m ago•0 comments

All Videos from 39C3: Power Cycles

https://www.youtube.com/playlist?list=PL_IxoDz1Nq2ajswL6wmP1qxyh-Iqon5oz
1•gjvc•16m ago•0 comments

Iranian Protesters Killed as Unrest Turns Violent on Fifth Day

https://www.wsj.com/world/middle-east/iranian-protesters-killed-as-unrest-turns-violent-on-fifth-...
2•JumpCrisscross•16m ago•0 comments

Silicon 'postage stamp' implant instantly emails your thoughts to AI

https://newatlas.com/medical-devices/silicon-implant-emails-thoughts-ai/
1•breve•23m ago•0 comments

List of Former Footlights Members

https://en.wikipedia.org/wiki/List_of_former_Footlights_members
1•zeristor•25m ago•1 comments

Visualization of influenza A virus entry into cells using virus-view AFM

https://www.pnas.org/doi/10.1073/pnas.2500660122
2•PaulHoule•30m ago•0 comments

(Nature) Economic inequality does not equate to poor well-being or mental health

https://twitter.com/nature/status/2006455318247604723
1•outrun86•30m ago•2 comments

Show HN: Tasker – An open-source desktop agent for browser and OS automation

https://automatewithtasker.com/
8•schnetzlerjoe•32m ago•1 comments

Neovim plugin to view Claude Code changes

https://github.com/johnernaut/claude-files.nvim
1•johnernaut•33m ago•1 comments

Show HN: Gfcli: A tool to search and install Google Fonts via terminal

https://github.com/tinsever/google-font-cli
1•tin7•34m ago•0 comments

Mock LLM APIs locally with real-world streaming physics

https://vidai.uk/platform/mock/
1•nagug•34m ago•1 comments

How have founders been successful at finding quality beta testers?

1•Megafeeder•36m ago•1 comments

The Year America's Economic Edge Evaporated

https://www.bloomberg.com/opinion/articles/2026-01-01/us-stock-market-and-gdp-lost-its-edge-in-2025
3•xqcgrek2•37m ago•1 comments

What an open lab can build with TPUs, Jax, and a little persistence

https://opensource.googleblog.com/2025/12/training-marin-32b-what-an-open-lab-can-build-with-tpus...
1•reqo•38m ago•0 comments

Why high-cardinality labels stress metrics databases

https://last9.io/blog/why-high-cardinality-metrics-break/
1•nishantmodak•38m ago•1 comments

Fixing My System76 Laptop in 20 Minutes or Less

https://danielmangum.com/posts/fix-system76-laptop-20-min/
1•hasheddan•39m ago•0 comments