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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•6mo 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!

AAVE App Announced – 1M USD insurance and 6%+ yields

https://aave.com/
1•hinach4n•35s ago•0 comments

The Linux Memory Management: a new book

https://nostarch.com/linux-memory-manager
3•mkrasnovsky•6m ago•0 comments

How Printing Presses Ignited the First Information Revolution

https://reason.com/2025/11/18/the-first-information-revolution/
1•rufus_foreman•7m ago•0 comments

I trusted AI instead of an agent to buy a home. I saved around $7k in fees

https://www.businessinsider.com/homebuyer-used-ai-tool-to-buy-home-2025-11
1•resalisbury•9m ago•1 comments

How to get clients with your newsletter

https://withpotions.com/blog/how-consultants-can-get-clients-with-newsletters.html
1•meow_mix•9m ago•0 comments

Show HN: A DSL helps a soulslike run directly on YouTube

https://uwplse.org/2025/11/18/level-editors.html
1•oflatt•9m ago•0 comments

SlimFaas: The Slimmest and Simplest Function-as-a-Service

https://slimfaas.dev/
1•lormayna•13m ago•0 comments

Interview Prep for the Anxious

https://natashajaffe.substack.com/p/interview-prep-for-the-anxious
1•natasha_jaffe•13m ago•1 comments

Doing these fall garden chores will make your spring easier

https://apnews.com/article/winter-chores-garden-bulbs-1bc6a62180d19baad0500d652b7b5d6c
1•mooreds•14m ago•0 comments

RefCOCO-M: a refreshed RefCOCO segementation dataset with better data

https://huggingface.co/datasets/moondream/refcoco-m
1•conwayanderson•15m ago•1 comments

Galaxy Brain Resistance

https://vitalik.eth.limo/general/2025/11/07/galaxybrain.html
1•walterbell•16m ago•0 comments

Companies complaining .NET moves too fast should just pay for post-EOL support

https://andrewlock.net/companies-using-dotnet-need-to-suck-it-up-and-pay-for-support/
2•haydenbarnes•17m ago•1 comments

App helped my reading problem

https://apps.apple.com/redeem/?ctx=offercodes&id=6450433398&code=REDDIT
1•readheroapp•20m ago•0 comments

Ask HN: GitHub Issues Rn?

1•keepamovin•22m ago•2 comments

Breaking the Algorithmic Contract

https://ssir.org/books/excerpts/entry/you-must-become-an-algorithmic-problem
1•jomaric•23m ago•0 comments

Simulating a complete Intel 4004 system with discrete components

https://blog.adafruit.com/2025/11/18/simulating-a-complete-intel-4004-system-with-discrete-compon...
3•rbanffy•24m ago•0 comments

Raising Cane's founder built a $5B company doing one thing well

https://www.inc.com/rob-walker/how-raising-canes-founder-todd-graves-built-a-5-billion-brand/9126...
1•BobbieG•25m ago•0 comments

One Swift mistake everyone should stop making today

https://www.hackingwithswift.com/articles/280/one-swift-mistake-everyone-should-stop-making-today
2•amichail•29m ago•0 comments

Junior Devs Can Choose AI Tools That Keep Their Company Safe

https://practicalsecurity.substack.com/p/dont-get-fired-how-junior-devs-can
1•atilla_bilgic•31m ago•0 comments

Data centre in the shed reduces energy bills to £40

https://www.bbc.co.uk/news/articles/c0rpy7envr5o
1•monooso•32m ago•0 comments

Show HN: I made an Premiere plugin to edit faster

https://meetcosmos.com/ai-premiere-pro-plugin/
1•correa_brian•33m ago•0 comments

Cathedral Builders Probably Shouldn't Use Coding Agents

https://theahura.substack.com/p/cathedral-builders-probably-shouldnt
2•theahura•34m ago•0 comments

House votes near unanimously to release the Epstein files

https://www.cnn.com/politics/live-news/trump-presidency-epstein-files-house-vote-11-18-25
1•gnarlouse•36m ago•1 comments

The QA Chamber of Horrors: Cautionary Tales for Software Leaders

https://www.functionize.com/blog/the-qa-chamber-of-horrors-cautionary-tales-for-software-leaders
1•mooreds•39m ago•0 comments

GitHub Down

88•mikeocool•39m ago•29 comments

Windows Clat Enters Private Preview: A Milestone for IPv6 Adoption

https://techcommunity.microsoft.com/blog/networkingblog/windows-clat-enters-private-preview-a-mil...
2•janeric•39m ago•0 comments

GitHub: Git Operation Failures

https://www.githubstatus.com/incidents/5q7nmlxz30sk
175•wilhelmklopp•41m ago•79 comments

GitHub Is Having Issues

51•polyrand•41m ago•30 comments

Report claims that Apple has yet again put the Mac Pro "on the back burner"

https://arstechnica.com/gadgets/2025/11/report-claims-that-apple-has-yet-again-put-the-mac-pro-on...
2•tosh•41m ago•0 comments

Fund managers warn AI investment boom has gone too far

https://www.ft.com/content/e2d93034-ef3b-4259-9ab1-c45396ca59b3
3•zerosizedweasle•42m ago•0 comments