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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!

Multiple Runtimes, Reducing Your Claude Code Bill, and Your Doctors Database

https://reactnativerewind.com/issues/multiple-runtimes-reducing-your-claude-code-bill-and-your-do...
1•lukebrandon•22s ago•0 comments

An Interview with Jen Schreiber (2025)

https://ciamweekly.substack.com/p/an-interview-with-jen-schreiber
1•mooreds•38s ago•0 comments

Show HN: StrangeClaw – a self-hosted agent running inside a Firecracker microVM

https://github.com/itsthestranger/strangeClaw
1•pstrange•1m ago•0 comments

Tell HN: Stack Overflow seems down

1•tom1337•1m ago•0 comments

My Journey in Open-Source Library Development

https://olegdubovoi.com/publications/my-journey-in-open-source-library-development/
1•empiree•1m ago•0 comments

Summary of recent buggy Kindle updates since Nov 2025: dictionary, fonts, manga

1•seam_carver•3m ago•0 comments

Reusing code can be a sunk cost fallacy in the LLM era

https://www.nvegater.com/blog/build-specific
1•nvegater•3m ago•0 comments

The Last Evolution, by John W Campbell Jr. (1932)

https://www.gutenberg.org/files/27462/27462-h/27462-h.htm
2•cf100clunk•3m ago•0 comments

Show HN: Building a Resume ontology and tooling for LLMs CV management

https://github.com/kelu124/Resume_RDF_update/tree/main
1•kelu124•4m ago•0 comments

Show HN: Rscrypto 0.4 treats constant-time as a release gate

https://github.com/loadingalias/rscrypto/releases/tag/v0.4.0
1•LoadingALIAS•4m ago•0 comments

Fable will NOT help if it thinks your ML research/ML engineering is interesting

https://twitter.com/SemiAnalysis_/status/2064482714149896431
1•malshe•5m ago•1 comments

Beyond Platforms and Protocols

https://upstream.force11.org/beyond-platforms-and-protocols/
1•jruohonen•6m ago•0 comments

Execution Feedback Matters More Than Pipeline Topology in 1-3B Code Generation

https://arxiv.org/abs/2604.21950
1•PaulHoule•6m ago•0 comments

Elon Musk accused of fuelling unrest after Belfast knife attack

https://dpa-international.com/politics/urn:newsml:dpa.com:20090101:260610-930-200483/
3•cdrnsf•6m ago•0 comments

Show HN: Chip's Challenge (1992), rebuilt for the web

https://claudes-challenge.vercel.app
1•kenblum•7m ago•0 comments

The .at domain registry is threatening to send debt collectors (2013)

https://old.reddit.com/r/sysadmin/comments/1bnjus/the_austrian_at_domain_registry_is_threatening_to/
1•lambertsimnel•8m ago•0 comments

.NET 11 Preview 5 is now available

https://devblogs.microsoft.com/dotnet/dotnet-11-preview-5/
1•philonoist•9m ago•0 comments

The Design of Display Processors (1968) [pdf]

http://cva.stanford.edu/classes/cs99s/papers/myer-sutherland-design-of-display-processors.pdf
1•rbanffy•10m ago•0 comments

Ask HN: The next evolutionary step in LLM usage?

2•tomaytotomato•12m ago•0 comments

Ask HN: Should the term "cognitive surrender" apply to writers who publish slop?

2•mpalmer•13m ago•0 comments

Show HN: HelixDB – A Graph Database built on Object-storage

https://github.com/HelixDB/helix-db/tree/main
1•GeorgeCurtis•13m ago•0 comments

Barry Diller says MGM's physical assets are more valuable in AI age

https://www.ft.com/content/121bd067-294f-4c01-bd51-8360b7a420a6
1•mikhael•14m ago•0 comments

Show HN: See what your AIs know about you that the others don't

https://www.memkeeper.eu/
2•tomtom1977•16m ago•1 comments

Foil

https://en.wikipedia.org/wiki/Foil_(narrative)
1•tosh•17m ago•0 comments

Anthropic releases 'safe' version of Claude Mythos AI model to public

https://www.theguardian.com/technology/2026/jun/09/anthropic-claude-mythos-ai-model
1•Brajeshwar•18m ago•1 comments

Everything Is Recorded Now

https://www.a16z.news/p/everything-is-recorded-now
1•7777777phil•19m ago•0 comments

China's BYD aims to be biggest car firm within five years

https://www.theguardian.com/business/2026/jun/10/china-byd-car-firm-ev-maker-toyota
7•toomuchtodo•21m ago•0 comments

Siri AI Is a Malware Vector

https://loufranco.com/blog/siri-ai-is-a-malware-vector
1•speckx•22m ago•0 comments

Show HN: Knobkit – fast ai webapps; fully in-browser or on a stateless server

https://knobkit.dev/
1•alainbrown•23m ago•0 comments

Linearizability and State-Machine Replication: Is It a Match?

https://arxiv.org/abs/2407.01720
1•Aydarbek•24m ago•0 comments