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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!

Red-Teaming the Agentic Red-Team

https://arxiv.org/abs/2606.24496
1•infwhispers•2m ago•0 comments

Apache Kafka's log compaction corrupts data

https://www.redpanda.com/blog/kafka-log-compaction-bug-fix-streaming
1•tanelpoder•3m ago•0 comments

Richard Scolyer, Cancer Expert Who 'Became His Own Subject,' Dies at 59

https://www.nytimes.com/2026/06/26/science/richard-scolyer-dead.html
2•speckx•3m ago•0 comments

An Interactive Map on a Microcontroller

https://geastack.com/blog-maps-on-a-microcontroller
1•arbayi•6m ago•0 comments

Hypersonic.js

https://github.com/hypersonic-js/hypersonic-js
1•joaquim_d•8m ago•1 comments

Quantum Snake Oil Is Flooding the News Cycle

https://postquantum.com/quantum-computing/quantum-snake-oil-flood-2026/
1•javhu•9m ago•0 comments

Netflix requires every user profile to be tied to unique email address

https://arstechnica.com/gadgets/2026/06/netflix-now-requires-every-user-profile-to-be-tied-to-uni...
2•p_stuart82•11m ago•0 comments

JSON-LD and fluree for human and agents interactions [video]

https://www.youtube.com/watch?v=VKGrqc8-e94
1•kdoubleday•12m ago•0 comments

Hush, let an AI agent use your secrets without ever seeing them

https://github.com/royashbrook/hush
2•royashbrook•15m ago•1 comments

Micron sets high memory prices for 5 years

https://www.heise.de/en/news/Micron-sets-high-memory-prices-for-5-years-11344834.html
1•logickkk1•17m ago•1 comments

Partially Observable Stochastic Games for Cyber Deception [pdf]

https://www.gamesec-conf.org/2020/GameSec_Proceeding_2020/Paper%202.4.pdf
2•jruohonen•17m ago•0 comments

20 Year time-lapse video of stars orbiting a supermassive black hole

https://www.youtube.com/watch?v=TF8THY5spmo
1•revicon•18m ago•1 comments

Hot and stuck in Paris and London: homes not built for heat

https://www.reuters.com/business/environment/hot-stuck-paris-london-homes-not-built-heat-2026-06-26/
1•rawgabbit•18m ago•2 comments

Framesmith 1.7 – a quality gate that tells an AI agent when a UI is done

https://github.com/vicmaster/framesmith
1•vicvelazquez•20m ago•0 comments

Finding Community Events in SF Easily

https://alexroginski.com/stuff_to_do/
1•alexroginski•20m ago•0 comments

Ask HN: What's a pirate's favorite programming language?

2•dieselgate•22m ago•2 comments

Erdős problem #870 solved with ChatGPT-5.5-Pro and Lean

https://twitter.com/DavidTurturean/status/2070531663461756950
2•asparagui•22m ago•0 comments

A personal meta harness for work on the go

https://herd.gehirn.ai/
2•nickguyai•24m ago•2 comments

Open AI SDR – An Open Source Version of the Artisans Ava BDR

https://opencomputer.dev/blog/open-ava-bdr-agent/
1•iacguy•24m ago•0 comments

Using GitHub Actions to Build Linux Kernels – 萌え豚's Blog

https://moebuta.org/posts/using-github-actions-to-build-linux-kernels/
3•abdelhousni•25m ago•0 comments

Reviewing the Experience of Italy in the 1970s

https://mondediplo.com/1998/09/11negri
1•jruohonen•26m ago•0 comments

Cairn – self-hosted health OS that connects labs, training and meals

https://github.com/zilet/cairn
1•miloszikic•27m ago•0 comments

Baguette: Headless iOS Simulator control via private SimulatorKit APIs

https://github.com/tddworks/baguette
1•loa_observer•27m ago•0 comments

MySQL's New Governance Model: Two steps forward and one step backwards

https://villagesql.com/blog/mysql-governance/
2•deesix•29m ago•2 comments

The Industry Mourns the Loss of Bruce Clay – The Father of SEO

https://www.seroundtable.com/bruce-clay-rip-41581.html
2•speckx•30m ago•0 comments

New split layout framework for nearly all Apple platforms (macOS, iOS, etc.)

https://twitter.com/mitchellh/status/2070273858154987537
1•simonebrunozzi•34m ago•0 comments

Rejecting Emails on AS Level

https://blog.vasi.li/june-spam-wave/
1•vsviridov•35m ago•1 comments

Tachio – Free esports API covering 13 games

https://tachiosports.com
1•domktt•36m ago•0 comments

YayText

https://yaytext.com/
1•visviva•39m ago•0 comments

Show HN: Mantis, A self-hosted LLM gateway

https://github.com/mantis-llm-gateway
2•rizsyed1•40m ago•0 comments