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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!

Archive-It – Built at Archive.org

https://archive-it.org/
1•gurjeet•2m ago•0 comments

Show HN: Camera Lets You See Sound in Complete Darkness [video]

https://www.youtube.com/watch?v=1zeHfH5TzWY
1•Regina0727•6m ago•0 comments

Grid-Forming vs. Grid-Following Inverters

https://www.batterydesign.net/grid-forming-vs-grid-following-inverters/
1•leonidasrup•6m ago•0 comments

UC Berkeley Law Artificial Intelligence Policy

https://www.law.berkeley.edu/academics/registrar/academic-rules/artificial-intelligence-policy/
1•fbrusch•8m ago•0 comments

The World Cup Is a Petri Dish

https://www.bloomberg.com/news/articles/2026-05-28/how-companies-are-tracking-disease-threats-dur...
1•petethomas•8m ago•0 comments

Show HN: BetterCallClaude – Open Source AI Legal Agents for Italy

https://bettercallclaude.it/
1•ReDeiPirati•11m ago•0 comments

Emacs Bra Size Calculator

https://pulusound.fi/blog/emacs-bra-size-calculator/
1•grumblepeet•14m ago•0 comments

MTerm

https://github.com/d0x2a/mTerm
1•vad_n__•15m ago•0 comments

WP23

https://wordpress.org/news/2026/05/wp23/
1•OuterVale•18m ago•0 comments

I Found the US Nuclear Detection System in Space [video]

https://www.youtube.com/watch?v=DjLnIb41DuQ
2•noazark•20m ago•0 comments

Mini-SWE-agent scores up to 74% on SWE-bench in 100 lines of Python code

https://mini-swe-agent.com/latest/
1•fittingopposite•22m ago•0 comments

A Comprehensive Analysis of the Open-Weight Frontier (May 2026)

https://deepresearch.ninja/2026/05/Qwen3.6-27B/35B-A3B-vs-Gemma-4-vs-DeepSeek-V4-A-Comprehensive-...
1•jackalxyz•30m ago•0 comments

PeerDrop – Direct file transfer. No cloud

https://peerdrop.app/
1•janandonly•30m ago•0 comments

Perfect randomness realized for the first time

https://phys.org/news/2026-05-randomness.html
2•arunc•31m ago•0 comments

The world's carmakers are struggling to compete with China

https://www.bbc.com/news/articles/c4g8vg72z43o
1•nairteashop•34m ago•1 comments

NovaGPU – An open-source GPU architecture written in Verilog

https://github.com/nova-studios-hw/novagpu-ts1t
3•novastudios-hw•34m ago•0 comments

Ask HN: How Much a Difference Does an LLM's Corpus Make?

1•giardini•35m ago•0 comments

Ask HN: Why not have an EU browser?

2•osigurdson•35m ago•3 comments

Oilfield units: a measurement system so cursed it made me change career [video]

https://www.youtube.com/watch?v=sdWEGzWFcCc
1•dgellow•37m ago•0 comments

Clojure → YAMLScript transpiler: using LLMs for normalization, SCI for execution

https://github.com/whitecell-dev/cljys
1•MaykonMan•38m ago•0 comments

Unemployment Simulator 2018

https://store.steampowered.com/app/3252360/Unemployment_Simulator_2018/
2•MrBuddyCasino•39m ago•0 comments

DOJ charges Google staffer over Polymarket trades netting $1.2M

https://text.npr.org/nx-s1-5836659
1•hvb2•39m ago•0 comments

Show HN: Product Trailers – The TV Channel for Product Hunt Launches

https://producttrailers.xyz
2•kentich•40m ago•0 comments

SpaceX: Did Elon Musk Just Rig the Stock Market? [video]

https://www.youtube.com/watch?v=sYA-z0Y8WRQ
6•mgh2•45m ago•0 comments

Show HN: Pre-computed market context for agents

https://tickerdb.com/
1•wolfman1•49m ago•0 comments

Sigbovik 2026 Proceedings [pdf]

https://sigbovik.org/2026/proceedings.pdf
4•boodleboodle•55m ago•0 comments

JAL to launch Moon payload service, aims to preserve heritage

https://english.kyodonews.net/articles/-/76763
2•anigbrowl•55m ago•0 comments

Amdahl's law for AI agents

https://electric.ax/blog/2026/02/19/amdahls-law-for-ai-agents
1•pramodbiligiri•57m ago•0 comments

Class CrunchLabs

https://www.classcrunchlabs.org/
3•mgarciaisaia•1h ago•0 comments

Parallelizing Arbitrary Python Code by Running 1M Python Interpreters on a GPU

https://github.com/jndean/gpusnek
1•jffry•1h ago•0 comments