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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!

It's not The Incentives–it's you

https://talyarkoni.org/blog/2018/10/02/no-its-not-the-incentives-its-you/
1•yurivish•7m ago•0 comments

Valheim 1.0 Has Arrived

https://www.valheimgame.com/news/valheim-1-0-has-arrived-/
1•MehrdadKhnzd•13m ago•0 comments

All grown-ups were once children… but only few of them remember it

https://mathstodon.xyz/@tao/117244102901892965
1•yurivish•13m ago•0 comments

Opensend: Self-hosted transactional email, newsletters, and campaigns with SES

https://github.com/R44VC0RP/opensend
1•handfuloflight•14m ago•0 comments

Show HN: Claude Project Downloader

https://chromewebstore.google.com/detail/claude-project-downloader/ghbdnpphggjonapjkehkmhpnmhcngbbg
1•qwikhost•19m ago•0 comments

Trump promises $5k dividend in convention speech, but only if Republicans win

https://www.npr.org/2026/09/09/nx-s1-5961045/republican-midterm-convention-dallas-trump-vance
4•KingOfMyRoom•22m ago•2 comments

The Network Always Beats the Castle

https://sundaylettersfromsam.substack.com/p/the-network-always-beats-the-castle
1•benwen•27m ago•1 comments

Anthropic Just Threatened to Kill Billions of People. This Is Not Okay

https://calnewport.com/anthropic-just-threatened-to-kill-billions-of-people-this-is-not-okay/
5•alexfortin•32m ago•1 comments

The AI policy window is open. We need to act

https://openai.com/index/ai-policy-window/
1•johntb86•33m ago•1 comments

Rebuilding an AI-made browser game with Astra 6

https://arcane-orb-workshop.pages.dev/
2•Spazztik•36m ago•0 comments

CLI for converting JSON logs to human-readable format

https://github.com/poonesnerfect/jlf
1•ankitg12•43m ago•0 comments

Sergey Brin is cooking up Google's AI destiny

https://www.businessinsider.com/sergey-brin-google-gemini-ai-microkitchen-2026-9
2•theanonymousone•44m ago•0 comments

Reverse engineering my e-scooter and rewriting the firmware in Rust

https://bensimms.moe/reverse-engineering-scooter/
2•vinhnx•46m ago•0 comments

Scammers demand ransoms from Instagram users over fake copyright claims

https://www.bbc.com/news/articles/cjw54ww73qjo
2•josephcsible•47m ago•0 comments

The "rnull" Rust block driver

https://lwn.net/Articles/1090378/
1•pykello•47m ago•0 comments

Switching Password Managers in 2026

https://rmondello.com/2026/09/07/switching-password-managers-2026/
1•vinhnx•49m ago•0 comments

A Decade of Rustls

https://rustls.dev/blog/2026-09-08-a-decade-of-rustls/
1•vinhnx•51m ago•0 comments

Garnet: A Next-Generation Cache-Store for Accelerating Applications and Services [pdf]

https://www.vldb.org/pvldb/vol19/p224-chandramouli.pdf
1•k_138z•51m ago•1 comments

Show HN: Oz – a Vim-style terminal editor written in Zig

https://github.com/niT-Tin/oz
3•niT-Tin•52m ago•0 comments

CUDA Rust: Two Tracks for Writing GPU Kernels

https://developer.nvidia.com/blog/introducing-cuda-rust-two-tracks-for-writing-gpu-kernels/
4•xiaoyu2006•52m ago•0 comments

NASA's New Experimental Jet Promises Supersonic Flight Without the Sonic Booms

https://nautil.us/nasas-new-experimental-jet-promises-supersonic-flight-without-the-sonic-booms-1...
2•dustfinger•53m ago•0 comments

Trump promises $5k payout to U.S. adults if Republicans win election

https://www.reuters.com/world/us/trump-promises-5000-payout-us-adults-if-republicans-win-election...
9•nateb2022•54m ago•2 comments

Fnmatch-ng: POSIX fnmatch in one Zig file, 20,794/20,794 vs. musl, zero heap

https://github.com/logicpl4gue/fnmatch-ng
1•logicpl4gue•55m ago•0 comments

The Story of VS Code [video]

https://www.youtube.com/watch?v=kHL3XzjpT5w
1•soheilpro•1h ago•0 comments

The Politics of Superintelligence (2025)

https://www.noemamag.com/the-politics-of-superintelligence/
2•the-mitr•1h ago•0 comments

Copying explains the collective behavior of AI agents in the wild

https://arxiv.org/abs/2609.09150
2•sbulaev•1h ago•0 comments

Suddenly I'm a Go Developer

https://www.infoworld.com/article/4219382/suddenly-im-a-go-developer.html
6•theanonymousone•1h ago•0 comments

Early Islam and the Birth of Capitalism

https://islamiceconomicsproject.com/early-islam-and-the-birth-of-capitalism/
2•teleforce•1h ago•0 comments

Andrew Tulloch has left Meta and joined Anthropic

https://twitter.com/ArfurGrok/status/2097862553552740846
1•bobrenjc93•1h ago•0 comments

The Prophet Mohammed's surprising life as a businessman [video]

https://www.youtube.com/watch?v=NkRHPEueW7Q
2•teleforce•1h ago•0 comments