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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!

Show HN: A self-organizing digital Zettelkasten for research

https://github.com/ulyssestenn/funes
1•bethanyhunt•1m ago•0 comments

Sharon Osbourne to release AI avatar of late husband Ozzy Osbourne

https://www.kxan.com/news/national-news/sharon-osbourne-to-release-ai-avatar-of-late-husband-ozzy...
1•ohjeez•1m ago•0 comments

The AI Efficiency Plateau

https://newsletter.getdx.com/p/the-ai-efficiency-plateau
1•azhenley•1m ago•0 comments

Bible MCP

https://bible.grod.es
1•grodes•2m ago•0 comments

The Decline of the Family Computer

https://brainbaking.com/post/2026/05/the-decline-of-the-family-computer/
2•Brajeshwar•3m ago•0 comments

F-35 versus Gripen E: A deep deep dive

https://hushkit.net/2025/03/14/f-35-versus-gripen-e-a-deep-deep-dive/
1•root-parent•4m ago•0 comments

Building OpenCode with Dax Raad [video]

https://www.youtube.com/watch?v=1VqKUrxR2C8
1•kesor•5m ago•0 comments

The Internet Has a Front Door – The Edge Is Now Intelligent

https://www.akamai.com/blog/cloud/internet-front-door-edge-now-intelligent
1•triplechill•6m ago•0 comments

Canada to order military plane fleet from Sweden in shift from US suppliers

https://www.theguardian.com/world/2026/may/27/canada-sweden-saab-globaleye-aircraft
1•tosh•7m ago•0 comments

Show HN: GAH, programatically add Git hunks

https://github.com/ThatXliner/gah
2•thatxliner•8m ago•0 comments

Sonic: Open-source platform to run logic over any network data

https://github.com/manassesbinga/sonic
1•numero6•9m ago•0 comments

Slick Lorem Ipsum Generator

https://lipsum-lorem.com
2•hackerbeat•10m ago•0 comments

grpyc: Fast gRPC replacement for Python, built in Rust

https://grpyc.com
1•tgma•10m ago•0 comments

A new register allocator for ZJIT

https://railsatscale.com/2026-05-27-a-new-register-allocator-for-zjit/
2•tenderlove•10m ago•0 comments

Our New Sustainability Startup

https://uksrs.org.uk/
1•rainmakrr•13m ago•0 comments

Show HN: 10k+ Funny Quotes

https://funnyquotes.lol/
1•hackerbeat•13m ago•0 comments

Training a 22MB prompt injection classifier that runs inline in a Lambda

https://www.stackone.com/blog/training-22mb-prompt-injection-classifier/
2•Hiskias•13m ago•1 comments

Show HN: When your agent LLM judge become your enemy

https://dmitriibuchilin.substack.com/p/we-hardened-an-llm-agent-each-defense
1•DmitriyBuchilin•13m ago•0 comments

WarpSpeed Approaches Speed of Light on Blackwell

https://www.doubleai.com/research/warpspeed-approaches-speed-of-light-on-blackwell
1•laginimaineb•13m ago•0 comments

Mutant Spider doesn't steal passwords. It resets MFA and steals the token

https://venturebeat.com/security/attack-dominating-financial-services-resets-mfa-steals-token
1•geephroh•14m ago•0 comments

Citadeld – Replay any CI failure locally from a single artifact file

2•hknzerodark1•14m ago•0 comments

May I recommend thinking of Emacs as your Fortress of Solitude

https://martinsos.com/posts/may-recommend-emacs-home-base
1•birdculture•16m ago•0 comments

Enlicitide lowers LDL by 60% with little side effect

https://apnews.com/article/cholesterol-merck-enlicitide-ldl-statin-pcsk9-f7383ce62b2e406841fbe630...
2•highfrequency•16m ago•0 comments

Recruit cracked engineers using GitHub

https://research.powerset.co/posts/recruit-cracked-engineers-using-github
3•meta87•16m ago•0 comments

What Did the Hudson River School Painters See?

https://www.nytimes.com/2026/05/25/travel/hudson-valley-painting-thomas-cole-frederic-church.html
1•prismatic•18m ago•0 comments

Show HN: Hm – a task runner with a Python DSL, growing into a CI/CD system

https://github.com/harmont-dev/harmont-cli
2•suis_siva•19m ago•0 comments

Webb reveals black hole that formed before its galaxy

https://esawebb.org/news/weic2609/?lang
1•alkyon•19m ago•0 comments

Spotify boss defends move to AI music, saying it is better than 'slop'

https://www.theguardian.com/technology/2026/may/26/spotify-ai-remix-tool-protects-artists-slop
1•Brajeshwar•19m ago•0 comments

Pied Piper Pitching YC: Simpsons Style

https://v2.deepmyst.com/v/f1FQektQ2Dm9Vlj1Ee6p3w
1•bahaAbunojaim•21m ago•0 comments

I think Anthropic and OpenAI have found product-market fit

https://simonwillison.net/2026/May/27/product-market-fit/
3•simonw•21m ago•0 comments