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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!

Hitachi Ltd, Part II – By Bradford Morgan White

https://www.abortretry.fail/p/hitachi-ltd-part-ii
1•rbanffy•2m ago•0 comments

Fuck|Thank You

https://pawelgrzybek.com/fuck-thank-you/
1•speckx•3m ago•0 comments

Show HN: I applied Lyapunov stability theory to detect when LLM agents spiral

https://github.com/vishal-dehurdle/state-harness
1•visha1v•4m ago•0 comments

Authorization via Gmail and Apple ID Banned in Russia

1•levleontiev•4m ago•0 comments

Advanced AI Safety Addendum

https://cloud.google.com/terms/advanced-ai-safety-addendum
1•hmokiguess•6m ago•0 comments

2 Kinds of People

https://2kindsofpeople.tumblr.com/
2•smartmic•6m ago•0 comments

Ultrafast machine learning on FPGAs via Kolmogorov-Arnold Networks

https://aarushgupta.io/posts/kan-fpga/
2•ag2718•9m ago•0 comments

Ask HN: What do you use for throwaway email inboxes in CI pipelines?

2•devdoc83•14m ago•0 comments

Famed historian Gordon S. Wood struck, killed in East Providence

https://www.wpri.com/news/local-news/providence/famed-historian-gordon-s-wood-struck-killed-in-ea...
1•speckx•17m ago•0 comments

The problem with generative AI (it's a dream machine)

https://metayeti.net/blog/the-problem-with-generative-ai
3•metayeti•17m ago•0 comments

Stack Overflow for Agents

https://agents.stackoverflow.com/
3•onatm•19m ago•1 comments

Why Does It Take Years to Get a Patriot Missile from Factory to Front Line?

https://www.wsj.com/world/why-does-it-take-years-to-get-a-patriot-missile-from-factory-to-front-l...
1•JumpCrisscross•19m ago•0 comments

Are these enhanced AI images on NYT?

https://www.nytimes.com/2026/06/09/us/tradwife-ballerina-farm-utah.html
1•boringg•19m ago•2 comments

Geblang 1.15 – the ergonomic, statically typed language

https://github.com/dwgebler/geblang
1•dwgebler•20m ago•0 comments

Apple's Siri-AI, or more shouting into the void about "private" agents

https://blog.cryptographyengineering.com/2026/06/09/apples-siri-ai-or-more-shouting-into-the-void...
2•cdrnsf•20m ago•0 comments

May I recommend thinking of Emacs as your Fortress of Solitude

https://martinsos.com/posts/may-recommend-emacs-home-base
1•lr0•21m ago•0 comments

Need honest feedback on non-launched idea

1•truehannan•22m ago•1 comments

Implementing Monads with Async Zig

https://platypro.net/blog/2026-04-25_monad/
1•carlsverre•23m ago•0 comments

The Wrong Apocalypse [pdf]

https://ionanalytics.com/wp-content/uploads/2026/02/The_Wrong_Apocalypse.pdf
1•monkeydust•24m ago•0 comments

FDA Expands Sunscreen Options for the First Time in 20 Years to Add Bemotrizinol

https://www.fda.gov/news-events/press-announcements/fda-expands-sunscreen-options-first-time-20-y...
3•OutOfHere•24m ago•2 comments

Meta ordered by EU to allow rival AI chatbots back on WhatsApp for free

https://www.reuters.com/world/eu-regulators-order-meta-allow-rival-ai-chatbots-free-access-whatsa...
6•onemoresoop•26m ago•1 comments

Identification of hot spring Obelisk-like RNA replicons

https://www.nature.com/articles/s41467-026-71096-6
2•PaulHoule•26m ago•0 comments

AWS: Randomness instead of hierarchy in the data center

https://www.heise.de/en/news/AWS-Randomness-instead-of-hierarchy-in-the-data-center-11326091.html
1•wodniok•27m ago•1 comments

YouTuber Punishes Himself by Writing a First Person Shooter in COBOL

https://gizmodo.com/masochistic-youtuber-punishes-himself-by-writing-a-first-person-shooter-entir...
4•speckx•27m ago•0 comments

Trump says Iran downed Apache helicopter, US must react

https://www.reuters.com/world/middle-east/trump-says-us-helicopter-pilots-who-went-down-strait-ho...
4•onemoresoop•29m ago•3 comments

Indian Numbering System

https://en.wikipedia.org/wiki/Indian_numbering_system
3•tosh•30m ago•0 comments

Ask HN: Is Apple Cringe?

1•mijustin•30m ago•0 comments

Automating Myself Out of Development

https://www.thoughtfultechnologist.com/p/automating-myself-out-of-development
2•nisabek•32m ago•0 comments

Brexit Ten Years On: The Economy

https://ukandeu.ac.uk/brexit-ten-years-on-the-economy/
38•mooreds•33m ago•30 comments

The Design of the Q'Nial (2017) [pdf]

https://www.nial-array-language.org/ndocs/Design%20of%20QNial%20V7.pdf
1•tosh•33m ago•0 comments