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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!

California roadside icon Pea Soup Andersen's, closed for years, to be demolished

https://www.sfgate.com/centralcoast/article/pea-soup-andersens-demolition-22342288.php
1•MilnerRoute•1m ago•0 comments

Tabstack by Mozilla

https://tabstack.ai
1•handfuloflight•3m ago•0 comments

What's New on World Emoji Day 2026

https://blog.emojipedia.org/whats-new-on-world-emoji-day-2026/
1•doublepg23•9m ago•0 comments

Mac gaming is finally getting the overpowered upgrade it deserves

https://www.macworld.com/article/3189951/apples-latest-game-porting-toolkit-beta-changed-how-i-th...
2•kristianp•13m ago•0 comments

Postlia – a social media scheduler that flags AI-sounding posts

https://postlia.com
1•EraySaygin•14m ago•0 comments

Same Crash. Twice the Funerals

https://www.talkingwreckless.com/p/same-crash-twice-the-funerals
1•haltingproblem•16m ago•0 comments

Mess with DNS

https://messwithdns.net/
1•gurjeet•18m ago•1 comments

Over 10k people shared what they love about GPT-5.6

https://welcome-to-codex.openai.chatgpt.site/
1•pretext•19m ago•0 comments

Ask HN: Claude Code for Ordinary User

1•oriettaxx•21m ago•0 comments

How Does Pangram Work?

https://pangram.substack.com/p/how-does-pangram-work
1•pretext•26m ago•0 comments

Pre-auth SQL injection in WordPress Core

https://github.com/47Cid/wp2shell-lab
1•sid47•26m ago•0 comments

Show HN: DeskMakeover – Restyle every Windows desktop icon in one click

https://dm.xiaominglab.com/
1•yangjinming•31m ago•0 comments

US Considers Creating Finra-Like Watchdog to Vet Top AI Models

https://www.bloomberg.com/news/articles/2026-07-17/us-considers-creating-finra-like-watchdog-to-v...
2•htrp•31m ago•0 comments

Show HN: IKEA Complexity Index

https://ikea.greg.technology/
4•gregsadetsky•34m ago•0 comments

PenEcho: An Open-Source Canvas with AI

https://github.com/erickong/penecho
2•mkw5053•34m ago•1 comments

Claude, with feedback from ChatGPT, writes a history of AI

https://docs.google.com/document/d/1SuekouRgA8NrQMOJdmpfowesV4-qTQxmhOe54aTYyw8/edit?tab=t.0
2•the-mitr•38m ago•0 comments

Tell HN: Codex may have reached 10M active users; usage limits reset again

4•linzhangrun•44m ago•0 comments

Certificate Expiry for Hacker News.com

https://news.ycombinator.com/
4•aarjaneiro•44m ago•1 comments

Kimi K3 vs. Meta: Muse Spark 1.1

https://runtimewire.com/article/head-to-head-kimi-k3-vs-meta-muse-spark-1-1
2•ryanmerket•50m ago•1 comments

Japan now has human refrigerators inspired by Japanese vending machines

https://soranews24.com/2026/07/18/japan-now-has-human-refrigerators-aims-to-help-save-lives-in-su...
5•rawgabbit•55m ago•3 comments

The Server Is a Sync Relay Now: Architecting Around Client-Owned State

https://tiarebalbi.com/en/blog/local-first-server-sync-relay-architecture
2•yruzin•1h ago•0 comments

Show HN: NS6 – Find your perfect domain

https://www.ns6.com/
2•nadermx•1h ago•2 comments

ASCII Art

https://github.com/doctorfree/Asciiville
2•audreyfei•1h ago•0 comments

Regressive JPEGs

https://maurycyz.com/projects/bad_jpeg/
3•vitaut•1h ago•0 comments

Erik J. Larson, The Myth of Artificial Intelligence (2021) [pdf]

https://dn721508.ca.archive.org/0/items/the-myth-of-artificial-intelligence/TheMythofArtificialIn...
1•1vuio0pswjnm7•1h ago•4 comments

Apitegromab for lean mass preservation during tirzepatide-induced weight loss

https://www.nature.com/articles/s41591-026-04440-4
1•nateb2022•1h ago•0 comments

Reading Between Dots: Decoding Hidden Computation Across Filler Tokens (ICML'26)

https://arxiv.org/abs/2607.03502
1•vismit2000•1h ago•0 comments

Tokyo Technarch Izakaya Night: Jensen like postwar industry captain

https://www.youtube.com/watch?v=X7ffSOzcYBc
3•oliculipolicula•1h ago•0 comments

Angie – Drop-In Replacement for Nginx

https://github.com/webserver-llc/angie
1•lwhsiao•1h ago•1 comments

TypePiao-Practice sheet music reading like typing, with instant feedback

https://typepiano.org
2•WenboS•1h ago•0 comments