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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!

Show HN: Building a SQL analyst agent from scratch

https://raminmousavi.dev/blog/building-a-sql-analyst-agent
1•ramin2nt2•5m ago•0 comments

Ubuntu 26.10 could drop btrfs, ZFS and LUKS support from GRUB

https://www.omgubuntu.co.uk/2026/03/ubuntu-grub-secure-boot-luks-changes
1•mariuz•6m ago•0 comments

BSI (Germany) defines when a cloud is sovereign

https://www.heise.de/en/news/BSI-defines-when-a-cloud-is-truly-sovereign-11272828.html
1•pros•7m ago•0 comments

Queen

https://medium.com/the-hitmagist/queen-2a8c2d9da9f5
2•bryanrasmussen•8m ago•0 comments

An attempt at explaining bipolar disorder and psychosis

https://osf.io/preprints/psyarxiv/w28g9_v1
2•anon1253•11m ago•0 comments

Quarkdown – Markdown with Superpowers

https://quarkdown.com/
1•amai•17m ago•0 comments

Show HN: Defeating AI by making knowledge accessible to Humans

https://github.com/tnelsond/peakslab
1•tnelsond4•17m ago•0 comments

China Blocks Meta's $2B Acquisition of AI Firm Manus

https://www.bloomberg.com/news/articles/2026-04-27/china-blocks-meta-s-2-billion-acquisition-of-a...
3•limoce•18m ago•0 comments

China blocks Meta's $2B purchase of AI startup Manus

https://finance.yahoo.com/sectors/technology/articles/china-blocks-foreign-acquisition-ai-0825482...
2•jmsflknr•18m ago•0 comments

Notes on Serial Experiments Lain

https://jordanmatthiass.net/essays/serial_experiments_lain
1•lilytweed•18m ago•0 comments

Open Source Mintlify Alternative

https://doccupine.com
1•luangjokaj•18m ago•1 comments

Open CoDesign: Open-source, local-first alternative to Claude Design and v0

https://firethering.com/open-codesign-ai-design-tool-open-source/
1•steveharing1•22m ago•0 comments

Tell HN: Ebay.com Is Down

2•NKosmatos•23m ago•1 comments

Enhancing Server Availability and Security Through Failure-Oblivious Computing [pdf]

https://people.csail.mit.edu/rinard/paper/osdi04.pdf
1•pabs3•33m ago•0 comments

The "Connectivome Theory": A New Model to Understand Autism Spectrum Disorders

https://pmc.ncbi.nlm.nih.gov/articles/PMC8892379/
1•AndrewDucker•33m ago•0 comments

Recursive Acronym

https://en.wikipedia.org/wiki/Recursive_acronym
1•Quizzical4230•36m ago•0 comments

Soulful Sites

https://app.paradigmai.com/sheets/76210606-6ce4-4ccc-a005-fb1cf6984a45
1•sauravmaheshkar•37m ago•0 comments

LLMs are not a higher level of abstraction

https://www.lelanthran.com/chap15/content.html
2•lelanthran•38m ago•3 comments

Ask HN: RedHat for Personal Use

2•bozdemir•39m ago•2 comments

The Truth About China's Green Energy Industry [video]

https://www.youtube.com/watch?v=Ff0AYRWrnGY
1•mpweiher•40m ago•0 comments

"Grandma, get on": Ukrainian robot carried 77-year-old from grey zone near Lyman

https://euromaidanpress.com/2026/04/25/grandma-get-on-ukrainian-robot-carried-77-year-old-from-gr...
1•eternalreturn•41m ago•0 comments

Claude Code Opus-4-7 VS Codex GPT-5-5

1•rashidae•41m ago•0 comments

MobED: Mobile Eccentric Droid – A robotic platform from Hyundai (2022) [video]

https://www.youtube.com/watch?v=uQqXbXpmkc0
1•num42•41m ago•1 comments

Ask HN: Paid ambient/background noise for focus?

2•deaux•45m ago•1 comments

A Website, Hosted on an ESP32

https://helloesp.com/
1•agilek•45m ago•1 comments

Show HN: AI voice screens for hiring managers to save time

https://worksignal.com/demo
1•cdnsteve•47m ago•0 comments

Show HN: AI agents that learn from their own failures each week

https://www.deployinfra.ai/
1•dkarigi•47m ago•0 comments

French teen who licked vending machine straw faces years in jail in Singapore

https://www.bbc.com/news/articles/cjw8w849g6go
5•jb1991•51m ago•1 comments

Was sind und was sollen die unendlichdimensionalen Supermannigfaltigkeiten

https://mathoverflow.net/questions/510716/was-sind-und-was-sollen-die-unendlichdimensionalen-supe...
1•jjgreen•51m ago•0 comments

Mapping the dreamworld: inside Le Guin's unseen cartographies of myth and mind

https://www.designboom.com/art/mapping-the-dreamworld-inside-ursula-k-le-guins-unseen-cartographi...
1•bryanrasmussen•54m ago•0 comments