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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•8mo 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!

The preposterous notion of AI automating "repetitive" work

1•cadabrabra•2m ago•0 comments

Retarget Mixamo Animation to MMD in one click

https://mixamo-mmd.vercel.app
1•Amyang•3m ago•0 comments

DHS Used Neo-Nazi Anthem for Recruitment After Fatal Minneapolis ICE Shooting

https://theintercept.com/2026/01/13/dhs-ice-white-nationalist-neo-nazi/
4•zerosizedweasle•7m ago•4 comments

Advancing regulatory variant effect prediction with AlphaGenome

https://www.nature.com/articles/s41586-025-10014-0
1•granto•7m ago•0 comments

Check this cool website I found

https://subtlesense.lovable.app
1•naiyya_thapa•8m ago•0 comments

Lessons from building search for vague, human queries

1•jeffmanu•11m ago•0 comments

Ask HN: Memory limitation with cursor parallel agents

1•nemath•11m ago•0 comments

Daedalus

https://github.com/internet-development/daedalus
1•mildmelon•15m ago•0 comments

A Beans Based AI Workflow

https://caidan.dev/blog/2026-01-29-a-beans-based-ai-workflow/
1•mildmelon•18m ago•0 comments

I'm planning to build a directory site – should I go with Next.js or Astro?

1•steve200512•19m ago•0 comments

Dialhome-study/browser-network-insights: Browser networking analysis framework

https://codeberg.org/dialhome-study/browser-network-insights
1•konform•23m ago•0 comments

Nvidia, Microsoft, Amazon in talks to invest up to $60B in OpenAI

https://www.reuters.com/business/retail-consumer/nvidia-microsoft-amazon-talks-invest-up-60-billi...
4•iamflimflam1•31m ago•0 comments

OpenClaw: The AI that actually does things (clawd/molt)

https://openclaw.ai/
2•rgbrgb•33m ago•0 comments

Way AI assistance impacts the formation of coding skills

https://www.anthropic.com/research/AI-assistance-coding-skills
3•vismit2000•33m ago•0 comments

A Project

https://zenodo.org/records/18426446
2•KaoruAK•34m ago•1 comments

'Empire of Madness' calls for 'the end of psychiatry'

https://www.washingtonpost.com/books/2026/01/29/empire-madness-mental-health-care-khameer-kidia-r...
2•Hooke•38m ago•0 comments

Typechecking is undecidable when 'type' is a type (1989) [pdf]

https://dspace.mit.edu/bitstream/handle/1721.1/149366/MIT-LCS-TR-458.pdf?sequence=6
4•zem•43m ago•0 comments

Signify: Securing OpenBSD from Us to You (2015)

https://www.openbsd.org/papers/bsdcan-signify.html
2•jumpocelot•44m ago•0 comments

Go is faster than Swift

https://programming-language-benchmarks.vercel.app/swift-vs-go
2•behnamoh•47m ago•0 comments

Microsoft is working to rebuild trust in Windows

https://www.theverge.com/tech/870045/microsoft-windows-11-issues-rebuilding-trust-notepad
2•JamesAdir•50m ago•0 comments

Top engineers at Anthropic, OpenAI say AI now writes 100% of their code

https://fortune.com/2026/01/29/100-percent-of-code-at-anthropic-and-openai-is-now-ai-written-bori...
3•PessimalDecimal•50m ago•0 comments

Hedge funds' correlation with stocks sparks fears over lack of crash protection

https://www.ft.com/content/8c1d9cfe-1d8f-45d5-9ab1-57fb203a170c
2•petethomas•52m ago•0 comments

Week 3: EE 292P Transistor Physics with Mark Lundstrom (Purdue)

https://hnvr.medium.com/week-3-ee-292p-atoms-bits-and-the-national-interest-the-semiconductor-tec...
1•malchow•54m ago•0 comments

Nerd Fonts

https://www.nerdfonts.com
2•jonbaer•54m ago•0 comments

Agent-Session-Commit

https://github.com/Olshansk/agent-session-commit
1•Olshansky•57m ago•0 comments

Spotify's Crackdown on Anna's Archive Domains Hits a Jurisdiction Snag

https://torrentfreak.com/spotifys-crackdown-on-annas-archive-domains-hits-a-jurisdiction-snag/
2•pabs3•57m ago•0 comments

Template Parameter Deduction: Eliminating Hidden Copies in Generic Code

https://0xghost.dev/blog/template-parameter-deduction/
1•PaulHoule•58m ago•0 comments

OpenClaw – Moltbot Renamed Again

https://openclaw.ai/blog/introducing-openclaw
2•ed•1h ago•0 comments

Show HN: A small reference demo for separating UI stalls from network delays

https://deterministic-stream-demo1.pages.dev/
1•Slaine•1h ago•1 comments

Show HN: JSON dataset of 1,100 trending AI image prompts from X

https://github.com/jau123/nanobanana-trending-prompts
1•jaujaujau•1h ago•1 comments