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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!

1•anitroves•2s ago

Grokipedia HackerNoon Entry

https://grokipedia.com/page/hackernoon
1•smooke•2m ago•0 comments

As AI costs rise, there is little evidence of major utility

https://www.gamesindustry.biz/as-ai-costs-rise-theres-little-evidence-of-major-utility-in-game-de...
1•dude250711•3m ago•0 comments

Why carbon capture and storage won't fix our climate crisis

https://projects.propublica.org/why-carbon-capture-cant-solve-climate-change/
2•world2vec•4m ago•0 comments

Pollen (CEO Negus-Fancey, CTO Wright) tried to remove article, and Google helped

https://blog.pragmaticengineer.com/pollen-tried-to-remove-my-article-about-callum-negus-fancey-an...
2•taubek•5m ago•0 comments

A Modern Inmarsat Decoder

https://github.com/SarahRoseLives/InmarScope
1•SarahRoseLives•8m ago•0 comments

A practical guide to defending your agent memory from attacks

https://medium.com/@vektormemory/a-practical-guide-to-defending-your-agent-memory-attacks-33b91c3...
1•vektormemory•10m ago•0 comments

Inside Consultants' Messy Shift from Hourly Billing

https://www.wsj.com/cfo-journal/inside-consultants-messy-shift-from-hourly-billing-7bd9b802
2•thm•12m ago•0 comments

Show HN: App to support reading foreign language books (on paper)

https://lexiglo.app
1•nikhaldi•14m ago•0 comments

Clever chemistry turns antibiotic-resistant bacteria's own defences against them

https://www.chemistryworld.com/news/clever-chemistry-turns-antibiotic-resistant-bacterias-own-def...
1•visha1v•15m ago•0 comments

The series of tubes filled with enormous amounts of mail, beneath our feet

https://buttondown.com/blog/pneumatic-email
1•maguay•15m ago•0 comments

Sustaining a Shared Reality: How Past Technology Waves Have Impacted Strategy

https://whitneyzim.medium.com/sustaining-a-shared-reality-how-past-technology-waves-have-impacted...
1•BerislavLopac•16m ago•0 comments

Is dbase dead? Customers cannot activate nor contact support

https://delphinightmares.substack.com/p/is-dbase-dead
1•deeaceofbase•17m ago•1 comments

Communicating the Value of Publicly Funded Science

https://cacm.acm.org/opinion/communicating-the-value-of-publicly-funded-science/
1•visha1v•18m ago•0 comments

The Hitchhiker's Guide to Agentic AI: From Foundations to Systems

https://arxiv.org/abs/2606.24937
1•tamnd•19m ago•0 comments

New European Search Engine

https://www.qmay.eu
1•Qmay_Dev•19m ago•0 comments

Anthropic CEO: Open-Source AI is getting dangerous

https://xcancel.com/coinbureau/status/2071330294452666695
4•therein•22m ago•2 comments

Berkshire Hathaway – It's essentially a pre-diversified empire

https://en.wikipedia.org/wiki/Berkshire_Hathaway
1•modinfo•26m ago•0 comments

Show HN: Sidequest is a better /btw for Pi

https://github.com/peterp/pi-sidequest
1•pistoriusp•27m ago•0 comments

LLM-free, layout-aware PDF chunker in pure Rust

https://github.com/matthiasnordwig/pdf-struct-chunker
1•MatthiasNordwig•27m ago•0 comments

Ukraine's newest strike weapon, Balloons

https://www.defensenews.com/global/europe/2026/06/25/ukraines-newest-strike-weapon-drifts-into-ru...
1•garyclarke27•28m ago•0 comments

SpecManager – a full agile team for founders, as a Claude Code plugin

https://github.com/joanseg/specmanager
1•joansg•34m ago•0 comments

Understanding Android's Project Treble, Project Mainline, APK Signature Schemes

https://medium.com/@Max_Sir/understanding-androids-project-treble-project-mainline-and-apk-signat...
1•thunderbong•34m ago•0 comments

Why did this journal retract two 1940s papers by Max Planck?

https://arstechnica.com/science/2026/06/why-did-this-journal-retract-two-1940s-papers-by-max-planck/
78•DR_MING•35m ago•0 comments

Life After Oligarchy

https://www.commonweal.scot/articles/magazine-zrell
1•robtherobber•36m ago•1 comments

War at the Final Frontier

https://medium.com/@firstfromreverse/war-at-the-final-frontier-2f9af096a297
1•WishingWisp•37m ago•0 comments

N8n Docker Compose stack with secrets, TLS, and a 16-check validator

https://github.com/empostigo/n8n-compose-field-guide
1•44_88•40m ago•1 comments

OctoPerf MCP – drive load tests from any LLM (OAuth 2.1, no API key)

https://api.octoperf.com/doc/mcp/
1•Jellly•40m ago•0 comments

Computer Networking: A Top Down Approach (9th Ed): Online Video Presentations

https://gaia.cs.umass.edu/kurose_ross/lectures.php
4•teleforce•45m ago•0 comments

Create sandboxed rich-text telegram agents with a single config file

https://github.com/montyanderson/007
2•montyanderson•49m ago•0 comments