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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!

Anton Poulter

https://adamapples.blogspot.com/2026/09/anton-poulter.html
1•Tomte•37s ago•0 comments

SNL Weekend Update: Anthropic CEO Dario Amodei on A.I.'S Threat to Humanity [video]

https://www.youtube.com/watch?v=-Nvne3LzBls
1•CharlesW•1m ago•0 comments

Ember-1

https://fireworks.ai/blog/ember-1
1•gmays•1m ago•0 comments

Gut Feelings (2007) [pdf]

https://hadinur.net/wp-content/uploads/2018/05/gerd-gigerenzer-gut-feelings_-the-intelligence-of-...
1•joebig•4m ago•0 comments

How Jev works: calibrated decision models

https://victordibia.com/explainers/jev/
1•azhenley•5m ago•0 comments

Sinai: By This Way Only

https://worldhistory.substack.com/p/sinai-by-this-way-only
1•gdillard•5m ago•0 comments

Calling the AI bluff: Adding "Do not guess" cut made-up fields from 71% to 20%

https://earnanhonestdollar.com/bench
3•FKJ•8m ago•0 comments

Then They Came for the Ostriches

https://harpers.org/archive/2026/10/then-they-came-for-the-ostriches-jb-mackinnon-paranoia-and-po...
3•Thevet•11m ago•0 comments

macOS 27: ifconfig command no longer prints hardware MAC address

1•luckman212•11m ago•0 comments

Show HN: Gat – Version large files with Git, without an LFS server

https://github.com/getgat-dev/gat
2•davnn•12m ago•0 comments

Elon Musk Film Hit with Censorship

https://www.thedailybeast.com/obsessed/damning-elon-musk-film-hit-with-shocking-censorship/
3•embedding-shape•16m ago•0 comments

Show HN: EthosLM - Turn a sentence into a Minecraft city

https://github.com/chaitbuilds/EthosLM
1•chaitbuildz•17m ago•0 comments

Show HN: Jobless Joke Language (JJL), a Brainf***-inspired esoteric language

https://github.com/ghetea-patrick/jjl
1•patrick-ghetea•18m ago•0 comments

Show HN: Claude on a 2007 Nokia 6300 (Java ME app, TLS 1.0, private CA)

https://github.com/emir/claude-s40
1•emir•19m ago•0 comments

MiMo-v2.6-Flash: on intelligence/price Pareto frontier

https://artificialanalysis.ai/models/mimo-v2-6-flash
2•AnodicElegy•19m ago•1 comments

Dynep: Real-time GPU spot market across 31 cloud providers

https://data.dynep.com
1•nurturely•23m ago•0 comments

Flock seeks to have security researchers' map of Flock cameras taken down

https://www.tomshardware.com/tech-industry/cyber-security/flock-seeks-to-have-security-researcher...
3•sbulaev•25m ago•0 comments

Hello Hnu

1•Mohamed_Amineio•27m ago•1 comments

Against Political Realism

https://xd1.dev/2024/07/against-political-realism
2•gchamonlive•27m ago•1 comments

The accidental history of 3000, 8080, and other port numbers

https://smarmelling.com/posts/the-accidental-history-of-3000-8080-and-other-port-numbers.html
2•smarmelling•28m ago•0 comments

ReBirth RB-338

https://en.wikipedia.org/wiki/ReBirth_RB-338
1•gregsadetsky•29m ago•0 comments

AI in hospital billing adds nearly $1B in extra costs

https://www.bcbs.com/about-us/association-news/bcbsa-analysis-ai-coding-tools-affects-healthcare-...
2•neehao•30m ago•1 comments

Halo: An open-source, self-modifiable, agentic operating system

https://gethalo.dev/
1•tanishqkanc•31m ago•0 comments

Appeals Court Lets The Pentagon Designate Anthropic a Supply-Chain Risk

https://www.wired.com/story/appeals-court-lets-the-pentagon-designate-anthropic-a-supply-chain-risk/
1•joozio•31m ago•0 comments

Life Forge – Autonomous Flight Simulator for AI Agents

https://github.com/zariffromlatif/life-forge
1•mdzariflatif•32m ago•0 comments

Joby Completes First-Ever Autonomous Flight Across the United States

https://www.jobyaviation.com/news/joby-completes-first-ever-fully-autonomous-flight-across-the-un...
1•sssilver•32m ago•0 comments

Joplin

https://joplinapp.org
1•Tomte•33m ago•0 comments

I was impressed by Jev, please explain why I shouldn't be

3•effisfor•33m ago•4 comments

I made a website that automatically tracks API specs

https://trackapi.uk
2•iolorhys•37m ago•0 comments

For states seeking to rein in license plate cameras, New Hampshire is a model

https://newhampshirebulletin.com/2026/09/24/as-states-seek-to-rein-in-flock-license-plate-cameras...
1•chmaynard•40m ago•0 comments