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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!

Show HN: I stopped doomscrolling (built an app for it)

https://apps.apple.com/in/app/mindsnack-daily-microlearning/id6752513248
1•Strawhatoofy•3m ago•0 comments

Anthropic Made a Big Mistake

https://archaeologist.dev/artifacts/anthropic
1•codesparkle•5m ago•0 comments

Malaysia and Indonesia block X over failure to curb deepfake smut

https://www.theregister.com/2026/01/12/asia_tech_news_roundup/
1•praptak•7m ago•0 comments

IVF has led to a record number of single moms in their 40s

https://www.npr.org/2026/01/12/nx-s1-5647761/ivf-fertility-motherhood-40s-cost-donor-decision
1•cebert•8m ago•0 comments

next to of course god america I

https://poetryarchive.org/poem/next-to-of-course-god-america-i/
1•KnuthIsGod•11m ago•0 comments

What are Tithe Maps (2021)

https://mapreading.co.uk/what-are-tithe-maps/
1•thomasjb•12m ago•0 comments

Show HN: Deepdrone – Controls drones with natural language through LLMs

https://github.com/evangelosmeklis/deepdrone
1•twelvechess•12m ago•0 comments

Show HN: Tokyo Land Price AI – RAG App to Explore Tokyo Land Prices

https://tokyolandpriceai.com
1•spider-hand•13m ago•0 comments

ESA considers righting wrongs of Ariane 6 by turning it into a Franken-rocket

https://arstechnica.com/space/2026/01/esa-considers-righting-the-wrongs-of-ariane-6-by-turning-it...
1•rbanffy•14m ago•0 comments

Feature Selection: A Primer

https://ikromshi.com/2025/12/30/feature-selection-primer.html
1•ikromshi•14m ago•0 comments

Conditional Logic Builder for WP Snippets AI Is Sensational

https://wpsnippets.ai/
1•cjtoolbox•18m ago•0 comments

Advice for Individual Contributors

https://blog.staysaasy.com/p/advice-for-individual-contributors
1•geoffbp•18m ago•0 comments

Telegram AI Dating Agent

https://github.com/arlanrakh/talk-to-girlfriend-ai
1•javatuts•18m ago•0 comments

Bloomberg Like Terminal for geopolitics – Monitor what's happening in the world

https://worldmonitor.app
2•alexander2002•20m ago•0 comments

Nvidia CEO: AI doomerism has done a lot of damage and is not helpful to society

https://www.businessinsider.com/nvidia-jensen-huang-ai-doomerism-damage-investments-2026-1
2•smurda•22m ago•0 comments

Is Orion's heat shield safe? New NASA chief conducts final review

https://arstechnica.com/space/2026/01/nasa-chief-reviews-orion-heat-shield-expresses-full-confide...
2•rbanffy•23m ago•0 comments

Burroughs B21 / Convergent AWS Vintage Computer Restoration – Dr. Scott M. Baker

https://www.smbaker.com/burroughs-b21-convergent-aws-vintage-computer-restoration
2•rbanffy•25m ago•0 comments

Comparing Ways to Give Claude Code Access to a Web Browser

https://simpletechguides.com/comparisons/we-tried-different-ways-to-give-claude-code-access-to-a-...
1•sixhobbits•25m ago•0 comments

Hebbian Theory

https://en.wikipedia.org/wiki/Hebbian_theory
1•baxtr•26m ago•0 comments

Borg 2.x: Important Notes

https://borgbackup.readthedocs.io/en/master/changes.html
1•tosh•28m ago•0 comments

Show HN: Designed a tool that 'designs' app from text

https://www.uilaa.com
1•rokontech•29m ago•0 comments

Java arrived on the Internet 30 years ago

1•mariogianota•30m ago•0 comments

Sprites – Stateful Sandboxes

https://sprites.dev/
1•charlieirish•31m ago•0 comments

Azul 9.0 (Australian Cyber Security Centre)

https://australiancybersecuritycentre.github.io/azul/
1•tsujamin•32m ago•0 comments

When AI Meeting Notes Become Legal Evidence

https://zenodo.org/records/18220448
1•businessmate•33m ago•1 comments

A new horrible game – chaves nightmares

https://www.chavesnightmares.org/
1•dorsherking•33m ago•0 comments

A Unique Performance Optimization for a 3D Geometry Language

https://cprimozic.net/notes/posts/persistent-expr-memo-optimization-for-geoscript/
1•birdculture•35m ago•0 comments

Amateur sleuth earns £2M reward for exposing research fraud

https://www.thetimes.com/uk/science/article/amateur-sleuth-2m-exposing-research-fraud-jhhb8wfnn
3•doener•35m ago•2 comments

Mdview.io – clean, focused Markdown viewer with TOC, Mermaid, and LaTeX support

https://mdview.io/
1•Igor_Wiwi•37m ago•0 comments

Startup employee fired after building automated system to streamline tasks

https://economictimes.indiatimes.com/us/life/startup-employee-fired-after-building-automated-syst...
2•msolujic•42m ago•1 comments