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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•11mo 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!

Trump expected to sign executive order urging more research psychedelic ibogaine

https://www.cnn.com/2026/04/16/health/ibogaine-psychedelic-trump-executive-order
1•Bender•2m ago•0 comments

NASA's Artemis II News Conference with Moon Astronauts [video]

https://www.youtube.com/watch?v=_43Ei9eQVww
1•BiraIgnacio•2m ago•0 comments

Hospital Held Woman for Months Against Her Will. SCOTUS to decide if she can sue

https://reason.com/2026/04/10/a-maryland-hospital-held-a-woman-for-months-against-her-will-the-su...
1•SilverElfin•3m ago•0 comments

Justice Dept. Appealing Surveillance Court Ruling Amid Congressional Impasse

https://www.nytimes.com/2026/04/16/us/politics/fisa-ruling-appeal.html
2•Cider9986•5m ago•0 comments

Relaxation of US day-trading rules opens door to YOLO trading, higher risk

https://www.reuters.com/legal/government/relaxation-us-day-trading-rules-opens-door-yolo-trading-...
3•petethomas•6m ago•1 comments

SpaceX Moves Up Vesting Schedule for Employee Shares Before IPO

https://www.bloomberg.com/news/articles/2026-04-16/spacex-moves-up-vesting-schedule-for-employee-...
1•petethomas•8m ago•0 comments

Zig 0.16.0: I/O as an Interface

https://ziglang.org/download/0.16.0/release-notes.html#IO-as-an-Interface
1•bpierre•11m ago•0 comments

France reports over 40 cryptocurrency kidnappings so far this year

https://www.lemonde.fr/en/police-and-justice/article/2026/04/16/france-reports-over-40-cryptocurr...
2•geox•12m ago•0 comments

Wii Homebrew Channel – WiiBrew

https://wiibrew.org/wiki/Homebrew_Channel
1•evo_9•13m ago•0 comments

Brave Origin

https://support.brave.app/hc/en-us/articles/38561489788173-What-is-Brave-Origin
1•nreece•13m ago•1 comments

Administration Planning to Blow Off FISA Court's Ordered Section 702 Fixes

https://www.techdirt.com/2026/04/15/administration-apparently-planning-to-blow-off-fisa-courts-or...
1•Cider9986•16m ago•0 comments

Connect maker devices to Claude Code and Cowork

https://github.com/anthropics/claude-desktop-buddy
1•felixrieseberg•17m ago•0 comments

Comfy.Guide

https://comfy.guide/
3•jethronethro•18m ago•0 comments

QSOlog – Offline-first PWA logbook for amateur radio operators

https://nuetzliches.github.io/qso-log/
1•nutz-bob•30m ago•0 comments

I Hate AI

6•jwpapi•33m ago•5 comments

100M commits to GitHub without using Git push

https://github.com/Wuerfelhusten/commitment
1•Wuerfelhusten•37m ago•1 comments

A type of bike theft in San Francisco

https://shub.club/writings/2026/april/a-type-of-bike-theft/
3•forthwall•46m ago•0 comments

Hospital at centre of child HIV outbreak caught reusing syringes in Pakistan

https://www.bbc.com/news/articles/clyrd818gd2o
19•flykespice•46m ago•1 comments

Breaking from Your Parents [video]

https://www.youtube.com/watch?v=VhpF9jC3a18
1•Aerbil313•47m ago•0 comments

I automated my local barbershop's chaos with code

https://ravoor.com/ar
5•megoxv•49m ago•0 comments

Stop New York's Attack on 3D Printing

https://www.eff.org/deeplinks/2026/04/stop-new-yorks-attack-3d-printing
3•iamnothere•50m ago•0 comments

Unwritten – 3-minute AI short film, Top at Soulscape 2026

https://www.youtube.com/watch?v=rzdvt-qOysI
1•gltanaka•52m ago•0 comments

Show HN: VCoding – A 5 MB native Windows IDE with no dynamic dependencies

1•Tonyjw2002•55m ago•0 comments

Planning and Monitoring Indoor Vertical Green Living Walls with Remote Sensing

https://onlinelibrary.wiley.com/doi/10.1155/ina/5782002
2•PaulHoule•56m ago•0 comments

George Orwell Predicted the Rise of "AI Slop" in Nineteen Eighty-Four (1949)

https://www.openculture.com/2026/04/how-george-orwell-predicted-the-rise-of-ai-slop.html
18•doener•57m ago•8 comments

Show HN: LLMs don't hallucinate because they're bad at math, it's the format

https://github.com/yvonboulianne/laeka-rational
2•yvonboulianne•58m ago•0 comments

Ne, the Nice Editor

https://github.com/vigna/ne
2•Lyngbakr•59m ago•0 comments

Everything we like is a psyop

https://techcrunch.com/2026/04/16/everything-we-like-is-a-psyop/
8•evo_9•1h ago•0 comments

North Korea targets macOS users in latest heist

https://www.theregister.com/2026/04/16/north_korea_social_engineering_macos/
2•Bender•1h ago•0 comments

Google Chrome lacks fingerprinting protection

https://www.theregister.com/2026/04/16/google_chrome_lacks_browser_fingerprinting/
3•Bender•1h ago•2 comments