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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!

Abandoning Scientific Linux Was a Mistake

https://blog.melashri.net/posts/scientific-linux-mistake/
1•elashri•1m ago•0 comments

I used to get paid to hang out with famous people

https://www.blackbirdspyplane.com/p/i-used-to-get-paid-to-hang-out-with-famous-people
1•pr337h4m•4m ago•0 comments

Ju Ju Tsu A book about jj / jujutstu

https://arialdo.codeberg.page/ju-ju-tsu/
1•fanf2•5m ago•0 comments

Data Privacy: Handling Data minimisation as a reactive strategy

https://scrutora.com/blog/data-minimisation-from-the-code-up
1•vimaldwivedi86•6m ago•0 comments

A garden and photovoltaic panels on the roof of the house [video]

https://www.youtube.com/watch?v=QPRrpcEwZV0
1•moltean•9m ago•0 comments

"What is still exciting in tech?"

https://merveilles.town/@neauoire/117315783660903484
1•gum_wobble•9m ago•0 comments

ShinyHunters claims FBI hack: 'This is NOT financially motivated'

https://www.theregister.com/security/2026/09/22/shinyhunters-claims-fbi-hack-this-is-not-financia...
2•joebuckwilliams•10m ago•0 comments

Heimdall – interactive code maps for your codebase

https://heimdallmap.com
1•pedrovgs•12m ago•1 comments

One thing I can beat Jev at: ROT13

https://arsh.zip/posts/jev-games/
1•arshxyz•14m ago•1 comments

PyTorch Implementation of Asymptotic Non-Closure Loss (ANC)

https://github.com/chris-anc/ANC-Loss-Tensor
1•anc_architect•14m ago•0 comments

Show HN: Lineselect – Interactive Line Picker

https://urbanogilson.github.io/lineselect/
1•urbanogilson•14m ago•0 comments

Using Llama-cpp-Python grammars to generate JSON

https://til.simonwillison.net/llms/llama-cpp-python-grammars
1•Bluestein•15m ago•0 comments

Show HN: Company-as-Code –> Spec and Validator

https://github.com/Pirol-ai/company-as-code
2•grischajacobs•17m ago•0 comments

Ask HN: How do GitHub Copilot and Anthropic Claude compare in cost?

2•erwindegroot•18m ago•1 comments

Jev Projects Listing Site

https://jevable.com/
1•Bluestein•19m ago•0 comments

Turn Phone into PC Speaker

2•kinle•20m ago•0 comments

Android 17 enables certificate transparency, and breaks custom CAs

https://httptoolkit.com/blog/android-17-certificate-transparency/
2•pimterry•21m ago•0 comments

Meta's New Muse AI Agent Read My Private Messages. I Never Asked It To

https://www.inc.com/jason-aten/metas-new-muse-ai-agent-read-my-private-messages-i-never-asked-it-...
1•LikelySupernova•24m ago•0 comments

WayVR – Open-source VR desktop overlay for Linux

https://digitalescapetools.com/tools/wayvr.html
1•xabd•25m ago•0 comments

Show HN: Moto – a native habit tracker for iPhone with a lifetime purchase

https://motohabit.com/
1•voising•25m ago•0 comments

Show HN: ReWeaver AI DriftDetector – score a GitHub repo's production readiness

https://drift.reweaver.ai/
1•gojongo•26m ago•0 comments

PEP 845 – Leading-Dot Value Patterns

https://peps.python.org/pep-0845/
1•orf•29m ago•0 comments

Hyprcrd – native Wayland host for Chrome remote desktop

https://github.com/jxoesneon/hyprcrd
1•jxoesneon•32m ago•0 comments

IdP Registration API

https://github.com/w3c-fedid/idp-registration/
2•erlend_sh•36m ago•0 comments

Shut up and calculate: Jev's new AI primitives for coders

https://www.theregister.com/devops/2026/09/23/shut-up-and-calculate-jevs-new-ai-primitives-for-co...
1•beardyw•37m ago•0 comments

Show HN: Gwae – infinite-scroll terminal multiplexer for AI agent fleets

https://github.com/hongnoul/gwae
1•hongnoul•38m ago•0 comments

Show HN: Structured Promptmaker

https://www.gptpromptmaker.com/
2•sanathbhat•43m ago•0 comments

Porting a clearing-house money market to a smart contract

1•citizensinan•46m ago•0 comments

Arcentry is back – create beautiful 3D infrastructure diagrams

https://arcentry.com/?src=hn
2•wolframhempel•47m ago•0 comments

Listening to loud music on a Singapore bus? It'll cost you

https://www.cnn.com/2026/09/22/travel/singapore-bus-rules-music-intl-hnk
2•edward•48m ago•2 comments