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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!

Hatching in 1PDG (2019)

https://www.patreon.com/watawatabou/posts/hatching-in-1pdg-31716880
1•andsoitis•1m ago•0 comments

Hyperblam – make music using Web Audio API only

https://hyperblam.how/
1•8bitsrule•2m ago•0 comments

Real Hack History Collection

https://archive.org/details/realhackinghistory
1•toomuchtodo•9m ago•1 comments

Want to own a real T. rex?

https://www.npr.org/2026/07/12/nx-s1-5890988/t-rex-gus-dinosaur-auction-sothebys-millions
1•defrost•9m ago•0 comments

Vibecoder Quin69 realizes programming is a real job [video]

https://old.reddit.com/r/LivestreamFail/comments/1uss5x8/vibecoder_quin69_realizes_programming_is...
2•ivewonyoung•11m ago•0 comments

Show HN: A 10-chapter synthesizer course in a single HTML file

https://grahampaasch.itch.io/oscillaedu
2•gpaasch•11m ago•0 comments

Show HN: Clark – AI assistant with own computer

https://www.clarkchat.com/
1•stan_kirdey•18m ago•0 comments

Show HN: Topsoil – a notch dashboard for coding agents, music, and files

https://topsoil-two.vercel.app/
1•davey2wavey•18m ago•0 comments

Found Better Pagerduty Alternative

https://github.com/FluidifyAI/Regen
2•furyman•22m ago•0 comments

I tracked down an animal abuser using OSINT [video]

https://www.youtube.com/watch?v=nzytWZPyuEw
1•Bender•24m ago•0 comments

Major forest fire only 50km from Paris

https://www.reddit.com/r/paris/s/8wXGehfCCY
1•Arodex•24m ago•0 comments

Separating Logic and Language

https://news.mit.edu/2026/separating-logic-and-language-0708
1•alexwwang•27m ago•0 comments

The Work of Helping A.I. Destroy Work

https://www.nytimes.com/2026/07/10/business/ai-white-collar-jobs.html
1•pseudolus•29m ago•1 comments

Closing a three-year-old issue using Rust arenas

https://giacomocavalieri.me/writing/gleam-rust-arenas
1•ryantsuji•41m ago•0 comments

The great (fire)wall: the technical details behind how China's internet works

https://kylejeong.com/blog/great-firewall
2•Kylejeong21•41m ago•0 comments

Embedcache – Cut embedding API costs by caching redundant requests

https://github.com/Ajay6601/embedcache
1•Ajay3043•42m ago•0 comments

Show HN: Whop Downloader – Bulk save videos from Whop in one click

https://chromewebstore.google.com/detail/whop-downloader/lfnmkoipepgcllbonheeogljjgcjhjaa
1•qwikhost•42m ago•0 comments

Llambda.lisp

http://funcall.blogspot.com/2026/07/llambdalisp.html
2•lemonberry•43m ago•0 comments

Gameboy is back ( no signup)

https://gb.omniiii.com/
3•djxjxjcjcjc•45m ago•0 comments

MacKenzie Scott's Giving, in Quality-Adjusted Life Years (QALYs)

https://maxghenis.com/mackenzie-scott-qaly/
18•383toast•53m ago•3 comments

Performant C/CUDA inference engine for Qwen 3.6 35B on RTX 5090 / Blackwell

https://github.com/ambud/q36
2•ambuds•58m ago•0 comments

Claude Code Usage Global Leaderboard

https://www.claudeusage.com
2•bazarkua•58m ago•0 comments

Apple's "Thermonuclear" Response to OpenAI's Threat

https://www.wsj.com/tech/ai/apples-thermonuclear-response-to-the-openai-threat-8d51c814
5•mful•1h ago•1 comments

Tacit Knowledge

https://en.wikipedia.org/wiki/Tacit_knowledge
11•chistev•1h ago•1 comments

Show HN: Let your coding agent iterate by seeing the browser

https://github.com/puffinsoft/peek-cli
5•G3819•1h ago•0 comments

Quintile – keyboard N×M grid tiling for macOS

https://github.com/stefanopineda/quintile
2•stefanopineda•1h ago•0 comments

Universal Learning of Nonlinear Dynamics

https://arxiv.org/abs/2508.11990
2•E-Reverance•1h ago•0 comments

Collections: How to Polis, 101, Part I: Component Parts

https://acoup.blog/2023/03/10/collections-how-to-polis-101-part-i-component-parts/
2•vinnyglennon•1h ago•0 comments

Matthew Effect

https://en.wikipedia.org/wiki/Matthew_effect
8•chistev•1h ago•0 comments

Nuts News

https://news.nuts.services/
4•kordlessagain•1h ago•0 comments