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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!

Toyota joins hydrogen truck alliance push

https://www.foxnews.com/tech/toyota-joins-hydrogen-truck-alliance-push
2•RickJWagner•3m ago•0 comments

Gobo

https://languagehat.com/gobo/
2•jruohonen•6m ago•0 comments

Our response to the Axios developer tool compromise

https://openai.com/index/axios-developer-tool-compromise/
2•campuscodi•8m ago•0 comments

Training LLMs to Predict World Events

https://thinkingmachines.ai/news/training-llms-to-predict-world-events/
2•EvgeniyZh•9m ago•0 comments

Show HN: Spuddy.sh – Describe your API in terminal get a hosted API with state

https://spuddy.sh
2•boyneyy123•10m ago•0 comments

Cyclone Ditwah

https://en.wikipedia.org/wiki/Cyclone_Ditwah
2•teleforce•15m ago•0 comments

Why It's So Hard to Fix an Electric Bike

https://www.wired.com/story/why-is-it-so-hard-to-fix-an-electric-bike/
3•dangle1•15m ago•1 comments

Show HN: PDF-Proof – Make Claude show where it found each value in a PDF

https://github.com/metedata/pdf-proof
2•young_mete•15m ago•0 comments

Gemma4

https://avenchat.com
2•yalvhe2009•17m ago•0 comments

Nvidia's moat is not what it used to be

4•florianleibert•18m ago•1 comments

Sol-RL: FP4 Explore, BF16 Train

https://nvlabs.github.io/Sana/Sol-RL/
2•gmays•19m ago•0 comments

Remove iOS Contact Posters

https://www.dadummdada.com/content/2026/006-ios-contact-posters/
2•Bowes-Lyon•20m ago•0 comments

SuperCmd – Open-source launcher for macOS with Raycast-compatible extensions

https://github.com/SuperCmdLabs/SuperCmd
2•mvac•20m ago•0 comments

India hits 150 GW solar milestone

https://www.pv-magazine.com/2026/04/10/india-hits-150-gw-solar-milestone/
1•rustoo•20m ago•0 comments

Music hardware company Elektron acquired by investment company Bonnier Capital

https://www.musicradar.com/music-tech/this-is-the-beginning-of-an-ambitious-journey-elektron-acqu...
3•jedimastert•21m ago•0 comments

Show HN: Turn 3 letters into a cube with different projections (inspired by GEB)

https://geb.gjlmotea.com/
1•gjlmotea•21m ago•0 comments

Agentic Specification Engineering

https://medium.com/@paul.bernard_80815/agentic-specification-engineering-agile-was-never-supposed...
1•paulbernard•22m ago•1 comments

A Breaking Bad grand strategy browser game – pure JavaScript, no frameworks

https://breakingbadgame.com
1•YoungCrack•23m ago•2 comments

Test your CV against any job description – free, open-source, AI-powered

https://github.com/simonesan-afk/CV-Praetorian-Guard
1•simonenespolo•26m ago•0 comments

Tesla Disables the FSD Used Illegally in over 100k Cars

https://www.autoevolution.com/news/no-more-hacking-tesla-disables-the-fsd-used-illegally-in-over-...
1•campuscodi•27m ago•1 comments

Historical Java (2014)

https://www.sweharris.org/post/2014-02-28-java/
1•jruohonen•29m ago•0 comments

Building the first AI Red Team OS – mythosai.cloud – early access open

https://mythosai.cloud/
1•cashbackoz•31m ago•0 comments

Private Equity Captured the Ambulance Market

https://www.thebignewsletter.com/p/code-red-why-your-city-cant-affordor
3•connor11528•31m ago•2 comments

A private collection of 10k Chicago show tapes finds a public home

https://chicagoreader.com/music/gossip-wolf/aadam-jacobs-collection-internet-archive-concert-reco...
1•taubek•32m ago•0 comments

Show HN: Millions of websites crawled for LLMs to rebuild the pricing pages

https://pricepage.lol/
2•kilroy123•34m ago•1 comments

Scuttlebutt Genesis

https://handbook.scuttlebutt.nz/stories/scuttlebutt-genesis
1•jruohonen•37m ago•0 comments

Suno, AI Music, and the Bad Future [video]

https://www.youtube.com/watch?v=U8dcFhF0Dlk
2•ptrhvns•37m ago•0 comments

Eternity in six hours: Intergalactic spreading of intelligent life (2013)

https://www.researchgate.net/publication/256935390_Eternity_in_six_hours_Intergalactic_spreading_...
3•wallflower•38m ago•0 comments

Guidelines for Submitting Unicode Emoji Proposals

https://unicode.org/emoji/proposals.html
1•wallflower•39m ago•0 comments

SQL-First PostgreSQL Migrations Without the Magic

https://medium.com/@mailbox.sq7/sql-first-postgresql-migrations-without-the-magic-dd2f383dee2a
3•alzhi7•42m ago•0 comments