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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!

Gen Z homeowners: More in their 20s are managing to buy despite the odds

https://text.npr.org/nx-s1-5791499
1•1659447091•46s ago•0 comments

Why 'Smart' Products Have Started to Look Like the Dumb Choice

https://www.nytimes.com/2026/05/14/magazine/dumb-phones-tvs-retronym-smart-tech.html
1•0in•1m ago•0 comments

Theron – a council of 31 specialist LLMs on one foundation

https://tryvext.com/landing
1•alayton•3m ago•0 comments

Craigslist Charitable Fund

https://www.craigslistfund.org
1•Yctg•9m ago•0 comments

JGuard v0.4.0 – Capability-based security for the JVM (post-SecurityManager)

https://github.com/jguard-io/jguard
1•nknize•10m ago•0 comments

Quantum Computing Expert Explains One Concept in 5 Levels of Difficulty [video]

https://www.youtube.com/watch?v=OWJCfOvochA
1•gmays•11m ago•0 comments

Apple TV 12% market share, reaping benefits of stale content

https://appleinsider.com/articles/26/04/20/apple-tv-reaping-the-benefits-of-stale-content-on-bigg...
1•mgh2•13m ago•0 comments

NCEES discontinuing PE Software Engineering exam (2019)

https://ncees.org/ncees-discontinuing-pe-software-engineering-exam/
1•consumer451•21m ago•0 comments

AI for the Real World: A Conversation with Yann LeCun

https://twitter.com/AnneliesGamble/status/2054219457451733382
2•gmays•21m ago•0 comments

The Evolution of Team Appwrite

https://appwrite.io/blog/post/the-evolution-of-team-appwrite
1•gauravmeena95•22m ago•0 comments

Production Is a Compiler Input

https://aicoding.leaflet.pub/3mjx4erlboc2l
1•ankitg12•25m ago•0 comments

Two computers, one monitor, zero fiddling – Alex Plescan

https://alexplescan.com/posts/2025/08/16/kvm/
1•ankitg12•28m ago•0 comments

New Issue Tracker

https://lightningtrack.io/login
1•garyeterry•29m ago•0 comments

Terence Tao: My recollections on the early history of compressed sensing

https://mathstodon.xyz/@tao/114967650999562435
4•johnbarron•43m ago•2 comments

Used to manage a collection of AI workflows for a single vertical domain – Wasup

https://github.com/EdwardJoke/Wasup
1•EdwardXie•45m ago•1 comments

The IndieWeb Is Wonderfully Dionysian

https://brennan.day/the-indieweb-is-wonderfully-dionysian/
2•gm678•45m ago•0 comments

Fix pathological performance in trait solver

https://github.com/rust-lang/rust/pull/155355
2•Jyaif•54m ago•0 comments

Pinote – A lightweight floating Markdown scratchpad app

https://github.com/ImFeH2/pinote
2•indigodaddy•55m ago•0 comments

I built a machine that can make you rich with math [video]

https://www.youtube.com/watch?v=2UM4j1_xEs0
1•tzvc•56m ago•1 comments

Senior NIAID Official Indicted for Concealing Records During Covid Pandemic

https://www.justice.gov/opa/pr/former-senior-niaid-official-indicted-concealing-federal-records-d...
6•Jimmc414•57m ago•2 comments

YC startup Luel appears to have copied Kled

https://twitter.com/avipat_/status/2055384102409253056
3•tjek•1h ago•1 comments

Show HN: Nexa-Gauge – LLM eval framework, now with self-hosted model support

https://github.com/harnexa/nexa-gauge
1•Sardhendu•1h ago•0 comments

Ask HN: What happened to ssh-audit.com?

2•Bender•1h ago•0 comments

Show HN: Plan-Graph based code generation with LLMs

https://github.com/agrin96/VibegraphGenerator
1•ag_rin•1h ago•0 comments

Kinetic typography: the what, why, and how

https://www.linearity.io/blog/kinetic-typography/
1•argee•1h ago•0 comments

Symposia AI

https://www.trysymposiaai.com/landing
2•CarlosEdu•1h ago•1 comments

Solving CartPole in 8 Weights

https://cartpole.neocities.org/
4•georgehotz•1h ago•0 comments

Magical Realism: "Northern Exposure" 25 Years Later (2015)

https://www.rogerebert.com/streaming/magical-realism-nothern-exposure-25-years-later
2•walterbell•1h ago•0 comments

Show HN: Wyndup – share a live countdown with your podcast guest

https://wyndup.net
1•ardwino•1h ago•0 comments

Elastic Cloud on Kubernetes, simplified: zone awareness, restarts, and mTLS

https://www.elastic.co/search-labs/blog/elasticsearch-kubernetes-zone-awareness-restarts-mtls
2•eigenBasis•1h ago•0 comments