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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!

Color-space: open color spaces collection with one API

https://color-space.io/
1•made_by_dy•56s ago•0 comments

Watching a language model think before it speaks

https://blog.nathanlangley.dev/posts/subtext.html
1•ninjahawk1•4m ago•0 comments

IGGT4D: Streaming 4D Instance-Grounded Geometry Transformer

https://iggt4d.github.io/
1•ilreb•6m ago•0 comments

A.I. Drones Are Coming. We Are Not Ready

https://www.nytimes.com/2026/07/20/opinion/ai-drones-modern-warfare.html
1•lxm•10m ago•0 comments

Apply Tracker, Free AI CV, Cover Letter and Job Tracker

https://www.apply-tracker.com/en
1•mirnumbing•10m ago•0 comments

Findborg – an ad-free find engine with community, AI, and real web results

https://www.findborg.com/
1•findborg•11m ago•0 comments

FilmWorld: Agentic Novel-to-Film Generation

https://filmworld-ai.github.io/
1•ilreb•11m ago•0 comments

If AI writes everything, why should anyone trust you?

https://www.adgully.com/post/18212/if-ai-writes-everything-why-should-anyone-trust-you
2•sbulaev•16m ago•0 comments

Nvidia increases the price of Jetson modules and devkits by up to 101%

https://www.cnx-software.com/2026/07/22/nvidia-increases-the-price-of-jetson-modules-and-devkits-...
2•mikece•17m ago•0 comments

Why Create Next Palantir?

https://nimish.ch/next-palantir
3•nimish_chauhan•17m ago•0 comments

A simple API for offering your coding agent a smoke break

https://smoke-break.pineapplefreefall.com
1•cr4shed•17m ago•0 comments

Zynthoro – AI-native ERP for SMEs, replace 15 tools, built solo

https://zynthoro.ai/
1•Zynthoro•19m ago•0 comments

Better Than Free: How to Differentiate in the Age of AI

https://tim.blog/2026/07/17/better-than-free/
1•lxm•19m ago•0 comments

Moravec's Paradox

https://en.wikipedia.org/wiki/Moravec%27s_paradox
1•m-hodges•19m ago•0 comments

Human, All Too Human: Martin Heidegger (1999) [video]

https://archive.org/details/youtube-gQ09a5LJFqo
1•petethomas•19m ago•0 comments

Coding agents cannot remove complexity

https://12gramsofcarbon.com/p/agentics-coding-agents-cannot-remove
1•theahura•22m ago•0 comments

Show HN: Roblox Gakuran Guide and Wiki

https://gakuranguide.wiki/
1•cksmct•25m ago•0 comments

Tangleflow: Converts GitHub Actions workflows to tangled workflows and back

https://github.com/43081j/tangleflow
1•wertyk•29m ago•0 comments

Aurora DSQL: Scalable, Multi-Region OLTP

https://brooker.co.za/blog/2026/07/19/dsql-paper.html
2•mariuz•31m ago•0 comments

1 month and 60 models later

https://www.supcpu.com/research/1-month-and-60-models-later/
3•romellogoodman•31m ago•0 comments

Galloping Galaxies (1985-1986)

https://archive.org/details/s-01-e-01-part-one_20260604
2•petethomas•32m ago•0 comments

A Controlled Study of Attention-Only Transformers

https://arxiv.org/abs/2607.18363
1•E-Reverance•33m ago•1 comments

The first six ideas in machine learning

https://stochastic.blog/the-first-six-ideas-in-machine-learning/
1•Anon84•33m ago•0 comments

Never Enough

https://dark.ronacher.eu/2026/7/21/never-enough/
1•reasonableklout•33m ago•0 comments

Show HN: My Attempt of Ricing macOS

https://github.com/kushvinth/dotfiles
1•Kushvinth•34m ago•0 comments

Air Force conducts live-fire test for Collaborative Combat Aircraft program

https://www.acc.af.mil/News/Article-Display/Article/4547699/air-force-conducts-live-fire-test-for...
2•lxm•36m ago•0 comments

Nanbeige4.2-3B

https://huggingface.co/Nanbeige/Nanbeige4.2-3B
4•drgore•36m ago•0 comments

What's under your feet in New York City

https://www.youtube.com/watch?v=Iclf_JnPkKw
2•sheri•39m ago•0 comments

Ask HN: Why AI labs publish different benchmarks?

2•mzubairtahir•45m ago•0 comments

Salience Induction Against Multi-Hop RAG Agents: Threat and Defense

https://arxiv.org/abs/2607.17535
2•sbulaev•51m ago•0 comments