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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•8mo 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!

Providing 99.999% of Availability for Unmatched Server Uptime

https://www.penguinsolutions.com/en-us/products/stratus-ftserver
1•doener•1m ago•0 comments

Landholder vs. Stockholder

https://aeon.co/essays/why-hume-is-better-at-explaining-modern-capitalism-than-marx
1•bryanrasmussen•3m ago•0 comments

We can't send mail farther than 500 miles (2002)

https://web.mit.edu/jemorris/humor/500-miles
2•giancarlostoro•7m ago•2 comments

ESR on LLM Coding

https://twitter.com/esrtweet/status/2016713740658344301
1•tiahura•7m ago•0 comments

FOSDEM 2012 Schedule Chart

https://rgbcu.be/dump/fosdem/2012
1•RGBCube•8m ago•0 comments

AI Prompt to Write in Minimalist Style of Ernest Hemingway

https://tools.eq4c.com/ai-prompts/ai-prompt-to-write-in-minimalist-style-of-ernest-hemingway/
1•eq4c•8m ago•0 comments

Show HN: The Unix compress algorithm with approximate matches

1•keepamovin•9m ago•0 comments

Stratus VOS

https://en.wikipedia.org/wiki/Stratus_VOS
1•doener•10m ago•0 comments

Was serving GPT-5 profitable?

https://twitter.com/i/status/2016652644560097377
1•gradus_ad•15m ago•0 comments

Breaking the Spell of Vibe Coding

https://www.fast.ai/posts/2026-01-28-dark-flow/
2•gmays•16m ago•0 comments

The reason cancer immunotherapy often fails

https://www.sciencedaily.com/releases/2026/01/260128075323.htm
2•Jimmc414•18m ago•0 comments

Explore Cartoon Characters

https://acartooncharacters.com/
1•jokera•19m ago•0 comments

Putting Gemini to Work in Chrome

https://blog.google/products-and-platforms/products/chrome/gemini-3-auto-browse/
2•diwank•21m ago•0 comments

37signals Isn't Smarter Than You, but They Are Different

https://www.nateberkopec.com/blog/37signals-is-not-smarter-than-you/
1•doppp•22m ago•0 comments

Wasmer 7.0

https://github.com/wasmerio/wasmer/releases/tag/v7.0.0
2•shscs911•23m ago•0 comments

I built a tool that turns brain dumps into Mermaid.js flowcharts

https://chaosclarity.app/
1•marwanghazi•31m ago•0 comments

Clawdbot's Peter Steinberger Makes First Public Appearance Since Launch

https://www.youtube.com/watch?v=qyjTpzIAEkA
1•doppp•32m ago•0 comments

[dupe] Tesla Kills Models S and X

https://gizmodo.com/tesla-kills-models-s-and-x-2000715273
1•andsoitis•35m ago•2 comments

Another Bay Area resident dies from toxic wild mushrooms

https://www.kron4.com/news/bay-area/another-bay-area-resident-dies-from-toxic-wild-mushrooms/
1•tokyobreakfast•35m ago•0 comments

FOSDEM 2026 Schedule Chart

https://rgbcu.be/dump/fosdem/2026/
2•RGBCube•36m ago•0 comments

[dupe] Tesla scraps Model S and Model X to build robots

https://www.cnn.com/2026/01/28/business/tesla-q4-2025-earnings
1•andsoitis•37m ago•2 comments

A Decoder-Based Framework for 3D-Printable Object Synthesis

https://arxiv.org/abs/2601.08015
1•PaulHoule•42m ago•0 comments

Climate TRACE: Independent Greenhouse Gas Emissions Tracking

https://climatetrace.org
1•csmantle•44m ago•0 comments

A clawdbot-like open-source project that connect my telegram only in 3 mins

https://twitter.com/WailiVery/status/2016707397155508393
1•waili•44m ago•0 comments

Agentic Vision in Gemini 3 Flash

https://blog.google/innovation-and-ai/technology/developers-tools/agentic-vision-gemini-3-flash/
1•geoffbp•46m ago•0 comments

Tesla FSD Hits 1.1M Users as Subscription Model Takes Over, 120 Eflops Compute

https://gearmusk.com/2026/01/29/tesla-fsd-hits-1-1m-users/
2•takumi123•47m ago•0 comments

PowerInfer: Fast LLM Inference on a Consumer-Grade GPU

https://github.com/Tiiny-AI/PowerInfer
1•oldfuture•51m ago•0 comments

Politics and the English Language, January 2026 edition

https://daringfireball.net/2026/01/politics_and_the_english_language_january_2026_edition
1•maxutility•52m ago•0 comments

Palestinian journalist Bisan Owda with 1.4M followers reports TikTok ban

https://www.aljazeera.com/news/2026/1/29/palestinian-journalist-bisan-owda-with-1-4m-followers-re...
8•siavosh•53m ago•0 comments

Show HN: AI tool to that reaches top in machine-learning competition

https://github.com/pentoai/ml-ralph
1•leopiney•54m ago•0 comments