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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•7mo 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: Open-source CSPM, DSPM, CIEM, and vulnerability management

https://github.com/clay-good/mantissa-stance
1•hireclay•59s ago•0 comments

Terry Tao: "LLMs are simpler than you think"

https://www.youtube.com/watch?v=ukpCHo5v-Gc
1•Ianjit•2m ago•0 comments

Show HN: Office2PDF - Official SDKs for Node.js (Python/Go/Java Coming)

https://github.com/politehq/office2pdf-sdks
1•alexpham14•9m ago•0 comments

Why your brain needs everyday rituals

https://bigthink.com/smart-skills/why-your-brain-needs-everyday-rituals/
1•thunderbong•9m ago•0 comments

Logistic Regression, the Sigmoid, and Log Loss

https://mateolafalce.github.io/2026/Logistic%20Regression%2C%20the%20Sigmoid%2C%20and%20Log%20Los...
1•lafalce•11m ago•0 comments

ChromeOS Flex resurrects a >12 year old laptop

https://konaraddi.com/writing/2026/2026-01-01-chromeos-flex/
1•konaraddi•18m ago•0 comments

Marathon OS: A gesture-based mobile shell and Linux system inspired by BB10

https://marathonos.xyz/
1•PaulHoule•30m ago•0 comments

Show HN: TCP chat server written in C# and .NET 9, used in the terminal

https://github.com/Sieep-Coding/simple-chat-csharp
2•sieep•32m ago•0 comments

The Kimwolf Botnet Is Stalking Your Local Network

https://krebsonsecurity.com/2026/01/the-kimwolf-botnet-is-stalking-your-local-network/
5•SamValYlieRcHE2•33m ago•0 comments

Panda Diplomacy

https://en.wikipedia.org/wiki/Panda_diplomacy
3•sieep•35m ago•0 comments

Schwarzman, OpenAI's Brockman Boost $102M Trump War Chest

https://finance.yahoo.com/news/schwarzman-openai-brockman-boost-102-151056084.html
5•dougb5•36m ago•0 comments

RubyEvents.org 2025 Wrapped – a look back at the Ruby community's year

https://www.rubyevents.org/wrapped
1•marcoroth•36m ago•0 comments

"I taught an octopus piano" [video]

https://www.youtube.com/shorts/rXM6_AiisB4
1•trelane•37m ago•1 comments

Tech Startups Are Handing Out Free Nicotine Pouches to Boost Productivity

https://www.wsj.com/tech/tech-startups-are-handing-out-free-nicotine-pouches-to-boost-productivit...
3•mattas•44m ago•2 comments

Ask HN: Transition Out of SWE and Regret It

2•t4367•45m ago•0 comments

2026 Delights and Not-So-Delightfuls

https://jakesimonds.leaflet.pub/3mbi4mcd3uk2v
1•jakesimonds•1h ago•0 comments

Einstein Probe detects an X-ray flare from nearby star

https://phys.org/news/2025-12-einstein-probe-ray-flare-nearby.html
3•wglb•1h ago•1 comments

Could OpenAI make a move on Pinterest?

https://seekingalpha.com/news/4536354-could-openai-make-a-move-on-pinterest
1•randycupertino•1h ago•1 comments

Dotnet Source Build Fails in 2026 Due To Date Overflow

https://github.com/dotnet/dotnet/issues/4037
2•csmantle•1h ago•0 comments

Year end sees record borrowing from Fed's standing repo operation

https://www.reuters.com/business/finance/banks-tap-record-liquidity-new-york-feds-standing-repo-f...
4•JumpCrisscross•1h ago•0 comments

A Basic Just-In-Time Compiler (2015)

https://nullprogram.com/blog/2015/03/19/
14•ibobev•1h ago•0 comments

Proving Liveness with TLA

https://roscidus.com/blog/blog/2026/01/01/tla-liveness/
9•ibobev•1h ago•0 comments

Apple Vision Pro production reportedly axed, marketing cut by more than 95%

https://www.pcguide.com/news/apple-vision-pro-production-reportedly-axed-despite-newer-m5-model-m...
12•ivewonyoung•1h ago•5 comments

Representing Hierarchies

https://gpfault.net/posts/first-child-next-sibling.html
2•ibobev•1h ago•0 comments

Fanimal Antitrust Lawsuit Against Ticketmaster Claims Startup Was Forced Out

https://www.ticketnews.com/2026/01/fanimal-files-antitrust-lawsuit-against-ticketmaster-claims-st...
2•hnburnsy•1h ago•0 comments

Show HN: I used AI to recreate a $4000 piece of audio hardware as a plugin

5•johnwheeler•1h ago•0 comments

2025: The Year SwiftUI Died

https://blog.jacobstechtavern.com/p/the-year-swiftui-died
2•alwillis•1h ago•0 comments

Uxn/Varvara ecosystem is a personal computing stack

https://100r.co/site/uxn.html
3•doener•1h ago•1 comments

Blaze: A Dec VT420 (and More) Emulator

https://mmastrac.github.io/blaze/
6•doener•1h ago•1 comments

Show HN: Share Claude Code and Codex CLI Transcripts

https://agentexports.com/
1•nicoritschel•1h ago•0 comments