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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!

The human eye may hold the fix for self-driving cars

https://newatlas.com/technology/eye-inspired-photomemristor-self-driving-cars/
1•breve•26s ago•0 comments

I wrote a free book about Scripture, AI, and language

https://wordnamefire.com/
1•seomister7•35s ago•0 comments

Pollen tried to remove my article and Google is assisting

https://blog.pragmaticengineer.com/pollen-tried-to-remove-my-article-about-callum-negus-fancey-an...
1•lolinder•8m ago•0 comments

Attention is all we have

https://davidbessis.substack.com/p/attention-is-all-we-have
1•gmays•8m ago•0 comments

Exposed DB, Exposed Credentials, Exposed KEV Exposures, Subdomain Takeover

1•gladiator291288•13m ago•0 comments

Annotation and the Malleability of Software

https://azlen.me/stories/annotation-story/
1•handfuloflight•14m ago•0 comments

Study highlights CERN's socio-economic contributions as a global research hub

https://home.cern/new-study-highlights-cerns-socio-economic-contributions-as-a-global-research-hub/
1•visha1v•17m ago•0 comments

A plane crashed into tallest skyscraper in Beijing.Hours later,all news scrubbed

https://www.cnn.com/2026/06/27/china/beijing-plane-crash-citic-tower-censorship-china-intl-hnk
1•Markoff•17m ago•2 comments

You can export/import passkeys now, but only on iOS

https://danfabulich.medium.com/you-can-export-import-passkeys-now-but-only-on-ios-3b90cddf5fe6
1•dfabulich•18m ago•0 comments

Virtual AI police chief introduced in Osaka amid rising imposter scams

https://mainichi.jp/english/articles/20260627/p2g/00m/0na/029000c
1•rawgabbit•26m ago•0 comments

Make Reality Answer [pdf]

https://hari.computer/book.pdf
4•markovblanket•34m ago•3 comments

Working around dragons with the Lemote Yeeloong laptop and OpenBSD

http://oldvcr.blogspot.com/2026/06/working-around-dragons-with-lemote.html
3•classichasclass•37m ago•0 comments

Alzheimers: The undiscovered country from whose bourn no traveler returns (2007)

https://www.rogerebert.com/reviews/away-from-her
2•walterbell•37m ago•0 comments

AI Realtime Commentator for the World Cup

https://twitter.com/zicohacks/status/2070401037018788301
4•aurenvale•42m ago•0 comments

The Unglamorous Side of Rust Web Development

https://blog.jetbrains.com/rust/2026/06/25/rust-web-development-2026/
5•vilasa•47m ago•1 comments

Ketogenic diets slow melanoma growth in vivo

https://link.springer.com/article/10.1186/s40170-022-00288-7
3•koolba•48m ago•2 comments

Improved LLM as a Judge Techniques

https://arxiv.org/abs/2606.27226
2•haritha1313•54m ago•0 comments

GSD – Open-source, local-first task manager built on the Eisenhower matrix

https://gsdtaskmanager.com/
2•vscarpenter•1h ago•0 comments

We can't retrain our way out of AI's economic disruption

https://mollykinder2.substack.com/p/we-cant-retrain-our-way-out-of-ais
2•keeda•1h ago•0 comments

Ford hired AI and sacked humans. It backfired badly

https://www.the-independent.com/tech/ford-ai-automation-human-workers-b3003787.html
30•speckx•1h ago•6 comments

Monlite – documents, vectors, cache, and job queue in one SQLite file

https://github.com/qataruts/monlite
3•emadjumaah•1h ago•0 comments

Bypass Protocol: The NDC Architecture Middleware Trap

https://www.youtube.com/watch?v=d4yvhpcXAzU
2•tgold8888•1h ago•0 comments

Show HN: Git-temp – scratchpad folder for AI agents; doesn't clutter Git status

https://github.com/sebmellen/git-temp
3•sebmellen•1h ago•0 comments

Deburr Edge Cases Skill: Make coding agents systematize their local code

https://github.com/imbue-ai/rust-bucket/blob/main/.agents/skills/deburr-edge-cases/SKILL.md
2•nvader•1h ago•0 comments

Yap – free offline voice dictation for Mac/Windows/Linux (Wispr Flow alt)

https://github.com/AkuchiS/yap
3•AkuchiS•1h ago•0 comments

Powerful Anthropic model, Fable 5, on track to return soon

https://www.axios.com/2026/06/27/anthropic-fable-5-return-soon
3•chris_overseas•1h ago•0 comments

An argument with Om about Wired spawned this newsletter. RIP brother

https://crazystupidtech.com/2026/06/27/how-an-argument-with-om-spawned-this-newsletter-rip-brother/
2•rmason•1h ago•0 comments

Marfa Public Radio Puts You to Sleep

https://www.marfapublicradio.org/podcast/marfa-public-radio-puts-you-to-sleep
71•reaperducer•1h ago•11 comments

A Man Who Invented a Surgery to Cure Himself

https://medium.com/swlh/doug-lindsay-the-man-who-cure-himself-12d40d3f643e
3•raynchad•1h ago•0 comments

Direct observation of the superallowed α-decay of 104Te

https://www.nature.com/articles/s41586-026-10581-w
2•thunderbong•1h ago•0 comments