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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!

Show HN: Putt.day a daily mini golf game

https://putt.day/
1•ellg•11s ago•0 comments

Three Colors

https://adamazzam.com/2026/three-colors
1•mathgenius•2m ago•0 comments

Why Does AI Love Writing About Lighthouse Keepers?

https://www.unite.ai/why-does-ai-love-writing-about-lighthouse-keepers/
1•foliveira•3m ago•0 comments

Nix Flakes and Their Guix Equivalents

https://coopi.neocities.org/posts/nix-flakes-vs-guix#guix-purity-by-design_6eece251b1ca
1•birdculture•4m ago•0 comments

A breakthrough in electron microscopy delivers sharper images of body's proteins

https://news.berkeley.edu/2026/06/11/a-breakthrough-in-electron-microscopy-delivers-sharper-image...
2•hhs•6m ago•0 comments

BlackRock private credit fund honours less than 40% of redemption requests

https://www.ft.com/content/65adec62-3505-4d01-8aa6-a609aa7cfdcc
1•tcp_handshaker•6m ago•0 comments

Hop.Earth – Google Maps and Need for Speed – Drive Anywhere on Earth in Browser

https://hop.earth
1•touchpadder•8m ago•1 comments

Nobody knows who invented the famous California roll

https://www.japanesegreenteain.com/blogs/green-tea-and-health/yama-sushi-marketplace
1•crescit_eundo•13m ago•1 comments

DNI Gabbard Reveals Evidence of U.S. Taxpayer-Funded Global Biolab Program

https://www.dni.gov/index.php/newsroom/press-releases/press-releases-2026/4163-pr-10-26
2•bookofjoe•14m ago•1 comments

Warner Bros $111B Sale to Paramount Approved by US Justice Department

https://www.bbc.com/news/articles/cjwgled9jxwo
1•mcapodici•18m ago•0 comments

Where Did Git Find My Email Address?

https://kgolubic.com/posts/where-did-git-find-my-email-address/
1•kgolubic•19m ago•0 comments

I'm 15 and built a self improvement app

https://apps.apple.com/us/app/levl-self-improvement/id6777136507
1•henrygatlin•20m ago•3 comments

LLMs Pre-Commodify Ideas

https://summerlightning.substack.com/p/llms-pre-commodify-ideas
2•jger15•27m ago•0 comments

U.S. Frequency Allocation Chart

https://fccid.io/frequency-allocations-chart
3•lgats•29m ago•0 comments

Show HN: Kardashev Labs – live US grid data (LMP, curtailment, queues, demand)

https://www.kardashevlabs.org/
1•AShoeToast•33m ago•0 comments

Shell could walk away from offshore wind in $1B+ sell-off

https://electrek.co/2026/06/12/shell-could-walk-away-from-offshore-wind-in-1-billion-sell-off/
3•Bender•34m ago•0 comments

FISA Authority Expires Amid Intelligence Nominee Fight

https://legis1.com/news/fisa-section-702-expires-authority-amid
3•root-parent•36m ago•0 comments

Wine 11.11 Released with Wayland Improvements

https://www.phoronix.com/news/Wine-11.11-Released
2•Bender•36m ago•0 comments

Using Agents to Commentate over Football

https://twitter.com/neevash/status/2065556015731626213
2•Nash0x7e2•39m ago•0 comments

AI Will Save Prediction Markets

https://twitter.com/0xjaniak/status/2058907417161646186
2•gmays•39m ago•0 comments

Twenty One Zero-Days in FFmpeg

https://depthfirst.com/research/21-zero-days-in-ffmpeg
8•redbell•42m ago•2 comments

Dicom/stl slicer for cat scans

https://github.com/tgys/stl-slicer
1•autocatt•44m ago•0 comments

Ask HN: Phishing from 646-257-4500

3•latchkey•44m ago•0 comments

Renault: Electric motors with no rare earths

https://www.renaultgroup.com/en/magazine/energy-and-powertrains/all-about-electric-motors-with-no...
6•bestouff•48m ago•0 comments

Ask HN: Are you using Spec Driven Development?

2•xpn•49m ago•2 comments

Show HN: ASCII Royale

https://github.com/chad/ascii-royale
1•chadfowler•52m ago•0 comments

By Necessity: The Return of the Engineer

https://carette.xyz/posts/the_return_of_the_engineer/
4•LucidLynx•53m ago•0 comments

Trojaned OpenSSH (In 2002)

http://miod.online.fr/software/openbsd/stories/trojan.html
2•birdculture•57m ago•0 comments

Life Biosciences: First Patient in Phase 1 Trial for Optic Neuropathies

https://www.lifebiosciences.com/life-biosciences-announces-first-patient-dosed-in-phase-1-trial-o...
1•Gaishan•57m ago•0 comments

Good Careers at Bad Companies

https://sharedphysics.com/good-careers-at-bad-companies/
1•bobbiechen•57m ago•0 comments