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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!

An End-to-End Machine Learning Pipeline on Time-Series Data

https://medium.com/@DolphinDB_Inc/from-raw-data-to-trained-models-an-ml-journey-b588fb81a086
1•CrazyTomato•1m ago•0 comments

Show HN: I built 184 free browser tools – PDF, image, dev, AI tasks, no upload

https://brevio.pro
1•ruimbarreira•2m ago•0 comments

Tokenization's Next Big Conundrum: What Do Buyers Get?

https://www.bloomberg.com/news/newsletters/2026-06-16/tokenization-s-next-big-conundrum-what-do-b...
1•petethomas•2m ago•0 comments

How to reduce your API LLM bill

https://github.com/salimassili62-afk/ai-costguard
1•salim2006•3m ago•0 comments

Companies question cost of AI as tokenmaxxing spending adds up

https://www.cbc.ca/news/business/ai-spending-ending-tokenmaxxing-tokenomics-9.7237680
1•uladzislau•9m ago•0 comments

Fast and Secure Cloud Delivery in Regulated Industries

https://blog.faridnsh.ninja/fast-and-secure-cloud-delivery-in-regulated-industries
1•alFReD-NSH•10m ago•0 comments

Ask HN: What has been bothering you lately?

1•julienreszka•11m ago•0 comments

Sci-Bot

https://sci-bot.ru/
2•charlieirish•14m ago•0 comments

The Joy of Tech: A Different Path for Products, People, & AI

https://blog.dfeldman.co/the-joy-of-tech-a-different-path-for-products-people-ai-df122b28764e
1•schvenk•19m ago•0 comments

Which AI agent spent the money on your OpenAI/Anthropic bill

https://github.com/Nu11P01nt3r3xc3pt10n/spaturzu-sdks
1•nu11P01nt3r•20m ago•0 comments

Show HN: High-Res Neural Cellular Automata

https://cells2pixels.github.io/
4•esychology•22m ago•0 comments

We Thought It Was a Compute Bottleneck. It Was a Design Decision

https://zhenthinks.substack.com/p/we-thought-it-was-a-compute-bottleneck
1•zhenthinks•25m ago•0 comments

Simulating a Solar Panel and Battery in Home Assistant Before Buying One

https://virtuallytd.com/posts/solar-simulation-home-assistant/
2•virtuallytd•25m ago•1 comments

YC Application Review Skill

https://github.com/morajabi/yc-partner
1•morajabi•27m ago•1 comments

Show HN: Open-source 3D Cell Models Pipeline

https://www.lorea.app/3d-library
2•herbstgewinn•28m ago•0 comments

Composable building blocks for full-stack AWS apps

https://github.com/aws-devtools-labs/aws-blocks
1•ferhatelmas•29m ago•0 comments

People want robots in warehouses and factories not hospitals or schools

https://hexagon.com/company/newsroom/press-releases/2026/people-want-robots-in-warehouses-and-fac...
3•JeanKage•30m ago•0 comments

Amazon Almost Killed Best Buy. Then, Best Buy Did Something Brilliant (2019)

https://www.inc.com/justin-bariso/amazon-almost-killed-best-buy-then-best-buy-did-something-compl...
1•downbad_•30m ago•0 comments

The Death of the Chatbot

https://wisdomofcrowds.live/p/the-death-of-the-chatbot
1•HR01•33m ago•0 comments

Qwen and Fable: An open-weights agentic coding model. 35B Mixture-of-Experts

https://huggingface.co/lordx64/Qwable-v1
1•thunderbong•35m ago•0 comments

SwiftOS – an OS in Embedded Swift that serves its own website

https://github.com/asaptf/swift-os
2•asaptf•35m ago•0 comments

Build of freestanding extensions for PHP is now available

https://codeberg.org/determin1st/php-sm-test
1•freestanding•36m ago•0 comments

Pentagon used Elon Musk's Grok AI to fire 2k missiles at Iran, official says

https://www.independent.co.uk/news/world/americas/us-politics/elon-musk-grok-ai-iran-missiles-pen...
3•cbg0•37m ago•0 comments

Oracle's OpenJDK Bans Generative AI Contributions, Oracle's GraalVM Allows Them

https://www.infoq.com/news/2026/06/oracle-genai-policies/
1•rowbin•38m ago•0 comments

GLM-5.2 is the new leading open weights model on Artificial Analysis

https://artificialanalysis.ai/articles/glm-5-2-is-the-new-leading-open-weights-model-on-the-artif...
3•himata4113•39m ago•0 comments

Distributed AI on AWS

https://www.day1training.com/
2•gjmveloso•40m ago•0 comments

R.O.B.

https://en.wikipedia.org/wiki/R.O.B.
1•tosh•44m ago•0 comments

Anthropic's latest feud with the Trump admin may help it, sales data suggests

https://techcrunch.com/2026/06/16/anthropics-latest-feud-with-the-trump-admin-may-actually-help-i...
1•frb•46m ago•0 comments

Show HN: Cerberus – PromQL/LogQL/TraceQL Query APIs Backed by ClickHouse

https://github.com/tsouza/cerberus
3•tcostasouza•47m ago•0 comments

GLM-5.2: Built for Long-Horizon Tasks

https://huggingface.co/blog/zai-org/glm-52-blog
1•victormustar•47m ago•0 comments