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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!

A Deep Dive into LDS Optimizations on AMD Instinct MI450 GPUs

https://rocm.blogs.amd.com/software-tools-optimization/mi450-lds-optimization/README.html
1•matt_d•2m ago•0 comments

Combinatorial Implosion

https://royalicing.com/2026/combinatorial-implosion
1•burntcaramel•3m ago•0 comments

Google Antigravity introduces Boost deep reasoning (/boost)

https://antigravity.google/docs/boost/
1•simonpure•5m ago•0 comments

Anthropic signs $35B cloud deal with Nvidia-backed Lambda, source says

https://www.thestar.com.my/tech/tech-news/2026/09/01/anthropic-signs-35-billion-cloud-deal-with-n...
1•geoffbp•6m ago•0 comments

Duane Davis guilty in murder of Tupac Shakur

https://abcnews.com/US/jury-begins-deliberating-trial-murder-tupac-shakur/story?id=136099547
1•colinprince•10m ago•1 comments

Expansion at China's 'Area 51'

https://www.twz.com/news-features/chinas-area-51-is-undergoing-a-massive-expansion
1•Gaishan•10m ago•0 comments

California Lawmakers Pass Plug-In Solar Bill

https://www.nytimes.com/2026/08/27/business/energy-environment/california-legislature-plugin-sola...
5•lxm•14m ago•1 comments

Is MCP Good Yet?

https://ismcpgoodyet.com
1•handfuloflight•15m ago•0 comments

I was sick of $99 directory scams, so I built a fair 10-min rotation launchpad

https://spotmy.app/
1•ricotouring•15m ago•0 comments

Not Becoming a Cyborg

https://nolanlawson.com/2026/08/31/on-not-becoming-a-cyborg/
1•Refreeze5224•16m ago•0 comments

PokeVS – Guess the taller Pokémon, battle stats

https://poke-vs.com
1•AdamRichic•16m ago•0 comments

Retiring from the Project (Vv221)

https://lists.debian.org/debian-devel/2026/08/msg00318.html
1•OsrsNeedsf2P•18m ago•1 comments

Fastpotify

https://fastpotify.rocks/
2•nreece•19m ago•0 comments

GTA 6's Relationship Mechanic Is 'Cheating' on Your Real-Life Partner and Break

https://www.ign.com/articles/gta-6s-relationship-mechanic-is-cheating-on-your-real-life-partner-a...
1•FannyJoeStyles•19m ago•0 comments

Astronomers detect fastest known star in Milky Way

https://www.theguardian.com/science/2026/aug/19/astronomers-detect-fastest-known-star-in-milky-wa...
1•gmays•20m ago•0 comments

Ask HN: Why does HN hide the best comments and promote the worst?

1•RepResetNow•20m ago•1 comments

Tailcat: Tailscale Without Tailscale, by Tailscale

https://tailscale.com/blog/tailcat
2•ricochet11•23m ago•0 comments

FTC, States Sue Amazon over Secret Ad Surcharge Scheme

https://www.ftc.gov/news-events/news/press-releases/2026/08/ftc-states-sue-amazon-over-secret-ad-...
2•js2•27m ago•0 comments

Why Cargo's Yank Warning Became the Attack

https://medium.com/@chinmayshringi4/why-cargos-yank-warning-became-the-attack-74ec06042e8a
1•syumei•27m ago•0 comments

Ex-Crips leader found guilty in 1996 murder of rapper Tupac Shakur

https://www.bbc.com/news/articles/c24j5192j7jo
35•1659447091•31m ago•10 comments

China's CXMT Begins Production of Its HBM3E Memory

https://www.reuters.com/world/asia-pacific/chinas-cxmt-makes-breakthrough-advanced-memory-chips-i...
1•yogthos•33m ago•0 comments

Show HN: A Curated Library of Hero Sections from Fast-Growing Startups

https://www.herotxt.page/
1•lynn_xx•35m ago•0 comments

How My Students Think About AI

https://www.lesswrong.com/posts/ySXuvJcqRindQwAk7/how-my-students-think-about-ai
4•pella•35m ago•0 comments

Tell HN: Remember to Change Your Filters

2•surprisetalk•36m ago•1 comments

Mortal AGI via ICA/PCA Rep-Grids Replacing Currency with Local Infrastructure

http://ingridx.dynu.net/Substack/Mortal-AGI.html
1•jimekus•39m ago•0 comments

Logic and the 2-Simplicial Transformer (2019)

https://arxiv.org/abs/1909.00668
1•wslh•42m ago•0 comments

RotaryCell: Making an unmodified rotary phone work over LTE with an ESP32-S3

https://github.com/fregacmols/RotaryCell
3•jombib•42m ago•1 comments

A composer published a paper on theoretical physics

https://retractionwatch.com/2026/08/05/a-composer-published-a-paper-on-theoretical-physics-his-la...
2•thunderbong•43m ago•0 comments

Why Google Stores Billions of Lines of Code in a Single Repository (2016)

https://dl.acm.org/doi/fullHtml/10.1145/2854146
1•diwash007•46m ago•1 comments

Curl Performance Tests

https://curl.se/perf/
2•theanonymousone•49m ago•0 comments