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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!

HamsterOS – Mean Hamster Software

https://www.meanhamster.com/products/hamsteros
1•colinprince•53s ago•0 comments

I Built a Voice API So My Mother Could Book a Taxi in Lomé(Togo)

https://kuma.compeel.com/
1•catdieng•1m ago•0 comments

Basha256.sh – Pure Bash 3.2 implementation of sha256

https://gist.github.com/ozkatz/dc7606ea68138b75999cbb1b271072a6
1•ozkatz•1m ago•0 comments

Apple iPhone 18 Pro supplier list, parts and photos exposed in Tata data leak

https://www.reuters.com/business/media-telecom/apple-iphone-18-pro-supplier-list-parts-photos-exp...
1•neilfrndes•2m ago•0 comments

Next Bcachefs Release Aims to Include Rust Code in the Kernel Module

https://www.phoronix.com/news/Bcachefs-1.38.7-Rust-Kernel
1•voxadam•2m ago•0 comments

Gemini's personalized AI image generation is now free for US users

https://techcrunch.com/2026/06/29/geminis-personalized-ai-image-generation-is-now-free-for-u-s-us...
1•haritha1313•3m ago•0 comments

Show HN: OpenSfM v1.0

https://github.com/OpenSfM/OpenSfM
1•AlgerianSam•6m ago•0 comments

Show HN: An Institutional Terminal for Retail Investors

https://marketterminal.com/chart
1•adamfontan•7m ago•0 comments

Ask HN: What's SOTA for AI Voice Narration

1•JimsonYang•9m ago•0 comments

Open-source AI agent workflow for auditing Solidity smart contracts

https://github.com/chain-shield/ai-agent-audit
1•chainshieldai•9m ago•0 comments

PlayStation Is Deleting 551 Movies from Customers' Accounts

https://www.gadgetreview.com/playstation-is-deleting-551-movies-from-customers-accounts
1•haritha-j•10m ago•1 comments

Zeus – a local AI agent orchestrator with web and phone UI (open source)

https://github.com/shreyasks094/Zeus
1•blackhawk094•11m ago•0 comments

What counts as cooking? In defense of the store-bought sauce

https://iza.ac/posts/2026/06/what-counts-as-cooking/
2•infinitewalk•12m ago•0 comments

Pure Terminal Text Editor

https://github.com/roblillack/pure
1•skogstokig•13m ago•0 comments

We Caught a North Korean Operative in a Hiring Pipeline

https://www.alex.com/blog/hiring-pipeline-fraud-detection
1•jenthoven•14m ago•0 comments

Rampart: 14.7MB model for privacy by redacting personal information

https://ndstudio.gov/posts/say-hello-to-rampart
2•cahaya•16m ago•1 comments

What Breaks a Cell's Ribs Can Make It Stronger

https://www.quantamagazine.org/what-breaks-a-cells-ribs-can-make-it-stronger-20260629/
1•jnord•16m ago•0 comments

South Korea to spend $1T on more memory chip production and humanoid robots

https://arstechnica.com/ai/2026/06/south-korea-to-spend-1t-on-more-memory-chip-production-and-hum...
4•jnord•18m ago•0 comments

Utility boss warns US faces blackouts due to power supply shortfall

https://www.ft.com/content/14d2e591-7cd5-4456-904f-1b7fdc5cbc1a
2•petethomas•18m ago•0 comments

Show HN: Fault-tolerant 4-neighbor hardware mesh with auto-rerouting

https://github.com/PJHkorea/consciousness-auto-rotation-artificial-neural-bypass/blob/main/fluxme...
1•PJHkorea•19m ago•0 comments

Uncapping the U.S. House is achievable and impactful

https://cmarmitage.substack.com/p/a-wildly-undervalued-tool-for-restoring
1•JumpCrisscross•20m ago•0 comments

Scientists find molecular-level evidence for two structures in liquid water

https://phys.org/news/2026-06-scientists-molecular-evidence-liquid.html
3•wglb•21m ago•1 comments

One Man's Delusion Is Another Man's Dream

http://guerrillademocracy.blogspot.com/2026/06/one-mans-delusion-is-another-mans-dream.html
1•GDNews503AD•23m ago•1 comments

The Artificial Neuron on a Silicon Chip

https://spectrum.ieee.org/artificial-neurons-on-silicon-chips
2•jnord•23m ago•0 comments

Ask HN: Best PR Review Experience?

1•prats226•24m ago•0 comments

GLM5.2 vs. Opus 4.8

https://www.youtube.com/watch?v=M4YEk4qVNOE
1•pvergadia•24m ago•1 comments

The composable AI thesis

https://openenvelope.org/writing/composable-ai-thesis/
1•ashconway•27m ago•0 comments

Mathematical finance, formally verified in Lean 4

https://github.com/raphaelrrcoelho/formal-mathfin
1•raphaelrrcoelho•29m ago•0 comments

There's a Reason Women Aren't Swooning over AI Like Men Are

https://thenoosphere.substack.com/p/theres-a-reason-women-arent-swooning
2•Anon84•29m ago•1 comments

US offers $10M for info on group behind Signal and WhatsApp hacking

https://arstechnica.com/information-technology/2026/06/us-offers-10-million-for-info-on-group-beh...
3•Gaishan•29m ago•0 comments