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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!

UUIDs, ULIDs and Sqids: A Practical Deep Dive

https://wendelladriel.com/blog/uuids-ulids-and-sqids-a-practical-deep-dive
1•shaunpud•46s ago•0 comments

Strata – An app that talks me out of dying outdoors

https://strata.highloop.co/
1•cloocher•2m ago•0 comments

The healing power of watching the boys of 'Jackass' do stupid things

https://www.yahoo.com/entertainment/general/article/the-healing-power-of-watching-the-boys-of-jac...
1•herbertl•4m ago•0 comments

Show HN: Tarot.free – Free Tarot Readings

https://tarot.free/
1•nadermx•6m ago•0 comments

The Hard Parts of Real-Time Voice Agent Audio

1•gokuljs•6m ago•0 comments

Binvariants: Register-Level Invaraint-Guided Fuzzing for Binaries

https://github.com/FuturesLab/Binvariants
1•matt_d•9m ago•0 comments

Env.style: Deployment environment disambiguation via favicon

https://www.env.style/
1•handfuloflight•11m ago•0 comments

Cewsco – the AI that keeps up with you

https://cewsco.com/
1•kalkalka•14m ago•1 comments

Show HN: Dedtxt is a quiet, cross-platform plain-text editor

https://dedtxt.app/
1•chrisportka•14m ago•0 comments

Moody Bible Institute breach leaves 2.3M accounts needing salvation

https://www.theregister.com/security/2026/07/06/moody-bible-institute-breach-leaves-23m-accounts-...
2•Bender•16m ago•0 comments

Brit supermarket giant triples down on facial recog to nab shoplifters

https://www.theregister.com/security/2026/07/06/brit-supermarket-giant-triples-down-on-facial-rec...
2•Bender•17m ago•0 comments

GitHub cuts short offer to burn repos on CD after mockery ensues

https://www.theregister.com/devops/2026/07/06/github-cuts-short-offer-to-burn-repos-on-cd-after-m...
1•Bender•17m ago•1 comments

PuzzleMoE: Efficient Compression of Large Mixture-of-Experts Models

https://supercomputing-system-ai-lab.github.io/projects/puzzlemoe/
1•matt_d•17m ago•0 comments

Jackrong LLM Fine-Tuning Guide

https://github.com/R6410418/Jackrong-llm-finetuning-guide
1•verdverm•19m ago•0 comments

Claude Sonnet 5: Anthropic's Most Agentic AI Model Arrives at a Reduced Price (2026)

https://lucasaguiar.xyz/en/posts/claude-sonnet-5-2026/
2•isfttr•20m ago•0 comments

How to sequence your own DNA at home

https://bradleywoolf.com/links-1/sequencing-my-own-dna-at-home
2•bilsbie•21m ago•0 comments

Supporting Ordering in Schema.org

https://blog.schema.org/2026/06/17/supporting-ordering-in-schema-org/
1•tingletech•22m ago•0 comments

Fixed-Point Theorems and the Ethics of Transparency (2025)

https://arxiv.org/abs/2509.06055
1•measurablefunc•24m ago•0 comments

Apple's agent security skills updated for Xcode 27 beta 3

https://mastodon.social/@PeteGoldsmith/116875450861776782
1•theraven•25m ago•0 comments

Show HN: GeoLens – a self-hosted catalog and map builder for spatial data

https://getgeolens.com/
1•ishiland•28m ago•0 comments

Video: Rio Rancho police arrest man accused of destroying Flock cameras

https://www.krqe.com/news/crime/video-rio-rancho-police-arrest-man-accused-of-destroying-license-...
1•evo_9•32m ago•1 comments

Show HN: Capsule – E2E encrypted file sharing

https://withcapsule.dev/
1•seanathan•34m ago•0 comments

Small AI Models Gain Traction In places with unreliable networks

https://spectrum.ieee.org/small-language-models-ai-pharmaceuticals
2•sscaryterry•35m ago•0 comments

Show HN: InstantVideos.org – short documentaries in ~30 seconds

https://instantvideos.org/
1•pw•36m ago•1 comments

Wikipedia Is Battling for the Soul of the Internet

https://www.nytimes.com/2026/07/05/business/media/wikipedia-ai-elon-musk.html
3•cdrnsf•37m ago•0 comments

Merlin the duck, a Mexico City streetside regular turned World Cup mascot

https://www.sfgate.com/sports/article/meet-merlin-the-duck-a-mexico-city-streetside-22306478.php
1•gnabgib•44m ago•0 comments

Samsar: Model-Composable 1-Shot Generative Video Harness and Software Factory

https://github.com/samsarone/samsar
1•proy24•49m ago•1 comments

Procedural Trick Before Recess Pushes EU Towards Capitulation on "Chat Control"

https://www.patrick-breyer.de/en/procedural-trick-before-summer-recess-pushes-eu-parliament-towar...
2•iamnothere•51m ago•0 comments

Show HN: LLM Thought Visualization

https://github.com/ninjahawk/Subtext
1•ninjahawk1•1h ago•0 comments

NSA and IETF: Fairness

https://blog.cr.yp.to/20260706-fairness.html
2•WatchDog•1h ago•0 comments