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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•7mo 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!

AI-Powered Investor Database for Fundraising – Free Forever

https://www.findrunway.com/
1•krxcet•3m ago•0 comments

I tried making Athletic Greens for Asians

https://datastream.substack.com/p/when-i-tried-to-make-athletic-greens
1•racketracer•6m ago•0 comments

Ads are showing up on Google's AI Mode now

https://sherwood.news/tech/ads-are-showing-up-on-googles-ai-mode-now/
1•Vasniktel•6m ago•0 comments

Peer-reviewed preprints and the Publish-Review-Curate model

https://www.coalition-s.org/blog/peer-reviewed-preprints-and-the-publish-review-curate-model/
1•fanf2•6m ago•0 comments

Show HN: An app that allows you to draw over everything

https://iscribby.com/
2•Quickz•7m ago•0 comments

A glimpse into V8 development for RISC-V

https://riseproject.dev/2025/12/09/a-glimpse-into-v8-development-for-risc-v/
1•floitsch•9m ago•0 comments

Mastodon on EU Digital Sovereignty

https://mastodon.social/@Mastodon/115689198997943088
3•kevin061•10m ago•0 comments

'Ready-made' T-cell gene therapy tackles 'incurable' T-Cell leukaemia

https://www.gosh.nhs.uk/news/ready-made-t-cell-gene-therapy-tackles-incurable-t-cell-leukaemia/
1•thunderbong•12m ago•0 comments

Canada's US Travel Boycott Is Backfiring in the Most Unexpected Way at US Border

https://www.thetravel.com/canadas-us-travel-boycott-is-backfiring-canadians-face-more-detailed-bo...
1•wahnfrieden•14m ago•0 comments

The Fluid Substrate: Streaming 1TB Models from NVMe via Io_uring

https://zenodo.org/records/17872125
1•Doug_Bitterbot•15m ago•1 comments

If You Quit Social Media, Will You Read More Books?

https://www.newyorker.com/news/fault-lines/if-you-quit-social-media-will-you-read-more-books
1•johntfella•17m ago•0 comments

Making Up HTTP Status Codes

https://goblin.codes
1•mrbnprck•20m ago•0 comments

Mistral AI surfs vibe-coding tailwinds with new coding models

https://techcrunch.com/2025/12/09/mistral-ai-surfs-vibe-coding-tailwinds-with-new-coding-models/
1•_____k•23m ago•1 comments

MicroPython v1.27 Released

https://github.com/micropython/micropython/releases/tag/v1.27.0
2•matt_trentini•23m ago•1 comments

The War Department Unleashes AI on New GenAI.mil Platform

https://www.war.gov/News/Releases/Release/Article/4354916/the-war-department-unleashes-ai-on-new-...
2•chickensong•23m ago•1 comments

Optimism, AI, and Bain's Socratic Wisdom

https://antongomes.com/posts/impending
1•AntonGomes•24m ago•0 comments

Google Illuminate – new research tool to complement NotebookLM

https://www.androidpolice.com/google-illuminate-best-research-tool-didnt-know-i-needed/
1•Gaishan•25m ago•1 comments

Bidirectional association between sleep and physical activity

https://www.nature.com/articles/s43856-025-01226-6
1•manidoraisamy•27m ago•0 comments

Ford teams up with Renault to make EVs that can rival Chinese brands

https://www.cnn.com/2025/12/09/business/ford-renault-european-evs-intl
2•breve•28m ago•0 comments

Can a Modified Rivian Take the EV Cannonball Record? [video]

https://www.youtube.com/watch?v=yfgkh4Fgw98
1•bob1029•28m ago•0 comments

Reliability and Idempotency

https://www.proxylity.com/articles/reliability-and-idempotency.html
1•mlhpdx•28m ago•0 comments

Show HN: Library to help find memory leaks for C#

https://github.com/curiosity-ai/memory-introspect
2•theolivenbaum•28m ago•0 comments

Qt, Linux and everything: Debugging Qt WebAssembly

http://qtandeverything.blogspot.com/2025/12/debugging-qt-webassembly-dwarf.html
7•speckx•29m ago•0 comments

U.S. Authorities Shut Down Major China-Linked AI Tech Smuggling Network

https://www.justice.gov/opa/pr/us-authorities-shut-down-major-china-linked-ai-tech-smuggling-network
1•737min•29m ago•0 comments

Calibre, AI, and one size not fitting all

https://neilzone.co.uk/2025/12/calibre-ai-and-one-size-not-fitting-all/
3•edward•35m ago•0 comments

Ten years ago in Hacker News frontpage

https://news.ycombinator.com/front?day=2015-12-08
1•kevin061•35m ago•0 comments

Australian Age Assurance Technology Trial– Final Report

https://www.infrastructure.gov.au/department/media/publications/age-assurance-technology-trial-fi...
2•Erikun•35m ago•0 comments

Show HN: Chromaflow – flow editor for parametric color palettes

https://chromaflow-editor.vercel.app/
1•pedroscosta•37m ago•0 comments

Everything Is Context: Agentic File System Abstraction for Context Engineering

https://arxiv.org/abs/2512.05470
1•robmao•37m ago•1 comments

Go Proposal: Secret Mode

https://antonz.org/accepted/runtime-secret/
7•enz•38m ago•0 comments