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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•11mo 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!

Pentagon strikes deals with 7 Big Tech companies after shunning Anthropic

https://www.cnn.com/2026/05/01/tech/pentagon-ai-anthropic
1•yurivish•2m ago•0 comments

Software as a Favour (SaaF)

https://www.alistaircroll.com/updates/back-to-doing-other-things/
2•conner_bw•5m ago•0 comments

Ask HN: Macbook or Linux Laptop for devs and heavy users?

1•kwimajs•5m ago•0 comments

US–Indian space mission maps extreme subsidence in Mexico City

https://phys.org/news/2026-04-usindian-space-mission-extreme-subsidence.html
2•leopoldj•7m ago•0 comments

Ir3 drones swarms ready to fuck you up

https://gitlab.com/btpfromsosua/ir3-drone-fusion
1•machardmachard•8m ago•0 comments

Washington has a new Anthropic problem

https://www.axios.com/2026/05/01/washington-new-anthropic-problem
1•Brajeshwar•9m ago•0 comments

Contributor Poker and Zig's AI Ban

https://kristoff.it/blog/contributor-poker-and-ai/
2•birdculture•9m ago•0 comments

10K Norm Hardy Prize for Usable Security, Seeking Practitioners

https://foresight.org/prizes/norm-hardy-prize/
1•AssistFI•10m ago•0 comments

A visit to Bletchley Park (2023)

https://theleo.zone/posts/a-visit-to-bletchley-park/
1•wonger_•11m ago•0 comments

How do copywriters study a market

https://www.nair.sh/guides-and-opinions/marketing-under-pressure/how-do-copywriters-study-a-market
1•nilirl•15m ago•0 comments

Our evaluation of OpenAI's GPT-5.5 cyber capabilities

https://www.aisi.gov.uk/blog/our-evaluation-of-openais-gpt-5-5-cyber-capabilities
1•samfriedman•16m ago•0 comments

Show HN: I have created newsletter interactive tools in one place

https://newsletrix.com/tools/
3•beledev•16m ago•0 comments

The AI church with no Christ

https://talkweb.eu/openweb/4528/
1•bogomil•17m ago•3 comments

Netflix goes vertical with its new mobile app

https://www.fastcompany.com/91534522/netflix-goes-vertical-with-its-new-mobile-app
1•andsoitis•17m ago•0 comments

Australia's Richest Person Gifts Jet to Far-Right Party Head

https://www.bloomberg.com/news/articles/2026-04-29/richest-australian-gina-rinehart-gifts-plane-t...
1•robtherobber•17m ago•0 comments

'Me Fail English? That's Unpossible': Studying Literature with 'The Simpsons'

https://archive.nytimes.com/learning.blogs.nytimes.com/2009/10/22/me-fail-english-thats-unpossibl...
1•latexr•17m ago•0 comments

Claude AI Agent Confesses to Wiping a Company's Database and All Backups

https://hothardware.com/news/claude-confesses-to-wiping-entire-database-in-seconds
2•ColinWright•18m ago•0 comments

Semantic Layer: The Defintive Guide (History, Purpose, Types)

https://www.dremio.com/blog/semantic-layer-the-definitive-guide/
1•alexmerced•19m ago•0 comments

NanoBrain – A Markdown+Git "second brain" for Claude Code

https://nanobrain.app/
2•siddixit•23m ago•0 comments

The Secret to Success Is 'Monotasking'

https://www.theatlantic.com/health/2026/05/monotasking-inside-the-box-excerpt-david-epstein/687015/
2•fortran77•24m ago•1 comments

NanoBrain – A Markdown+Git "second brain" for Claude Code

https://github.com/siddsdixit/nanobrain
2•siddixit•24m ago•0 comments

Where the sun is overhead, and the monuments built to mark it

https://pilgrimapp.org/sunpath/
1•momentmaker•25m ago•0 comments

Social Media is now Parasocial Media

https://journals.sagepub.com/doi/10.1177/20563051261437487
1•bookofjoe•27m ago•0 comments

Top AI Companies Agree to Pentagon Deals for Classified Work

https://www.wsj.com/tech/ai/top-ai-companies-agree-to-pentagon-deals-for-classified-work-9c621e78
3•ChartMaster22•28m ago•1 comments

Gh-relay:share a readonly browser view of your private repo via a temporary URL

https://github.com/soub4i/gh-relay
1•soubai•30m ago•0 comments

Show HN: Secure-by-default Ollama Docker image with built-in auth, only 70MB

https://github.com/hwdsl2/docker-ollama
1•hwdsl2•31m ago•0 comments

Microtonal Sid Music? Angine de Poitrine Bassline in C64 Basic [video]

https://www.youtube.com/watch?v=5bZKlIbSB_c
1•ingve•31m ago•0 comments

Bye Spotify, Hello MP3s

https://minimal.bearblog.dev/bye-spotify-hello-mp3s/
2•pastel5•31m ago•0 comments

Pentagon Makes Deals with A.I. Companies to Expand Classified Work

https://www.nytimes.com/2026/05/01/us/politics/pentagon-ai-companies-deals.html
1•doener•31m ago•1 comments

Claude hacked my ("rotary") phone

https://ktoya.me/claude-for-hardware/
1•ktoyame•35m ago•0 comments