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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!

My Philosophy on Alerting from a Site Reliability Engineer at Google

https://docs.google.com/document/d/199PqyG3UsyXlwieHaqbGiWVa8eMWi8zzAn0YfcApr8Q/edit
1•vanyle•36s ago•0 comments

Amazon launches its 'sovereign' cloud in Europe and plots expansion

https://www.cnbc.com/2026/01/15/amazon-sovereign-cloud-europe-expansion.html
1•Latitude7973•1m ago•0 comments

Hypothetical Divine Signatures: Proving Omniscience via Computational Complexity

https://www.stephendiehl.com/posts/divinity/
1•pure_coder•3m ago•0 comments

Russian Footprints (2006)

https://www.nationalreview.com/2006/08/russian-footprints-ion-mihai-pacepa/
1•thomassmith65•4m ago•0 comments

Beyond chain-of-thought: Scaling reasoning width and depth via parallel thinking

https://twitter.com/Meituan_LongCat/status/2011515214521647603
1•mountainview•6m ago•0 comments

Wikipedia's 25th Birthday

https://wikimediafoundation.org/wikipedia25/
1•omegacombinator•8m ago•0 comments

Why CTOs Are Exhausted [video]

https://www.youtube.com/watch?v=r1_10-CjnFI
1•avivby•9m ago•0 comments

CEO-CTO Therapy (Part 2): Measuring Engineering

https://avivbenyosef.com/ceo-cto-therapy-part-2-measuring-engineering/
1•avivby•9m ago•0 comments

iKKO Partners with MediaTek and SIMO to Launch MindOne

1•alamando•10m ago•0 comments

Podclip

https://play.google.com/store/apps/details?id=com.podclip.app&hl=en_US
1•ghostnoci•11m ago•0 comments

Show HN: SharpSkill – Forget your thoughts about Tech Interviews

https://sharpskill.fr/en
1•MakeMilk•11m ago•0 comments

AI Chrome Extension that copies UI components from live websites in your project

https://chromewebstore.google.com/detail/ui-capture-by-landinghero/kdnhhppnjcfeedmlblmibigilaokfohd
1•samyakk•13m ago•0 comments

Horizontalization in Biotech

https://corinwagen.github.io/public/blog/20260113_horizontalization.html
1•sebg•13m ago•0 comments

X 'acting to comply with UK law' after outcry over sexualised images

https://www.theguardian.com/technology/2026/jan/14/x-acting-to-comply-with-uk-law-after-outcry-ov...
1•beardyw•14m ago•1 comments

Show HN: Combo – A high-performance browser video editor SDK using WebCodecs

1•snapmotion•16m ago•0 comments

Chat is the least interesting interface to LLMs

https://www.haskellforall.com/2026/01/chat-is-least-interesting-interface-to.html
1•sebg•17m ago•0 comments

PulseDaily – a local-first, no-login habit tracker

https://pulsedaily.codezs.online
1•fcxl•17m ago•1 comments

NamePhi – AI-Powered Domain Name Generator for Brandable Identities

https://www.namephi.com/
1•quillzhou•18m ago•0 comments

Reconstructability as a Threshold Question in AI-Mediated Representation

https://www.aivojournal.org/reconstructability-as-a-threshold-question-in-ai-mediated-representat...
1•businessmate•19m ago•1 comments

Open Source Strategies

https://tempestphp.com/blog/open-source-strategies
1•brentroose•21m ago•0 comments

ATT Room 641 [pdf]

https://jnslp.com/wp-content/uploads/2014/05/On-the-Bulk-Collection-of-Tangible-Things.pdf
1•rballpug•23m ago•1 comments

Two AI researchers are now funded by Solana

https://ghuntley.com/solana/
1•ghuntley•25m ago•0 comments

MultiLang‑ASM:A Universal Assembly Platform for Kids,Students,Kernel Developers

1•neuroosgenesis•27m ago•0 comments

Simpler than Photoshop but for free AI Landscaping

https://hadaa.pro/
2•Fh_•29m ago•1 comments

Photos Capture the Breathtaking Scale of China's Wind and Solar Buildout

https://e360.yale.edu/digest/china-renewable-photo-essay
5•mrtksn•29m ago•0 comments

Physics of foam resembles AI training

https://phys.org/news/2026-01-physics-foam-strangely-resembles-ai.html
3•sebg•30m ago•0 comments

Formbase – open‑source back end for HTML forms

https://github.com/formbase-dev/formbase
3•ephraimduncan•36m ago•0 comments

DB Branching in Mirrord

https://metalbear.com/blog/db-branching/
1•aviramha•37m ago•0 comments

A simple TUI video converter for the AV1 codec

https://github.com/framicheli/av1converter
1•francescomi•40m ago•0 comments

Show HN: Free and open sourced prompt skills game for kids

https://prompts.chat/kids
1•fka•41m ago•0 comments