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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•11mo 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!

Introduction to My Personal Blog

https://mylightstillshines.wordpress.com/2026/05/05/introduction/
1•jaygirl•31s ago•0 comments

I'm looking for an AI Automation Engineer role or gig

1•Divinz•35s ago•0 comments

CVE-2026-31431: Copy Fail vs. rootless containers

https://www.dragonsreach.it/2026/05/04/cve-2026-31431-copy-fail-rootless-containers/
1•averi•5m ago•0 comments

Making the Marlboro Man

https://quartr.com/insights/edge/making-the-marlboro-man
1•_vaporwave_•16m ago•0 comments

Safari 26.4 Supports WebTransport

https://webkit.org/blog/17862/webkit-features-for-safari-26-4/
2•nazcan•18m ago•1 comments

Fiddler sues Google after AI Overview wrongly claimed he was a sex offender

https://www.theguardian.com/music/2026/may/05/canadian-ashley-macisaac-fiddler-musician-singer-so...
5•prawn•20m ago•2 comments

Pennsylvania Health Insurance independent research report for Q2 May 2026

https://archive.org/details/pa-health-insurance-market-2026-final.docx-1
2•Steaglsz•22m ago•0 comments

Commodity Markets Outlook [pdf]

https://thedocs.worldbank.org/en/doc/f3138644a1e8e2bb631399ae11d6c408-0050012026/original/CMO-Apr...
1•gmays•23m ago•0 comments

Adobe's 'Modern' User Interface Is Just Webpages – Pixel Envy

https://pxlnv.com/linklog/adobe-modern-user-interface/
2•tambourine_man•23m ago•0 comments

Apple Explores Using Intel and Samsung to Build Main Device Chips in the US

https://www.bloomberg.com/news/articles/2026-05-05/apple-explores-using-intel-and-samsung-to-buil...
9•tambourine_man•26m ago•0 comments

A constrained approach to coding agents

https://github.com/brainless/nocodo
2•brainless•32m ago•1 comments

Ask HN: Best Embedding Models?

3•devstein•33m ago•0 comments

Biscuit

https://github.com/yattsu/biscuit
3•unixfg•38m ago•0 comments

An Analysis of the PocketOS Debacle

https://thedailywtf.com/articles/empty-pockets
2•pseudohadamard•41m ago•1 comments

Musk Settles SEC Suit for Underpaying Twitter Investors by $150M for Just $1.5M

https://www.law.com/corpcounsel/2026/05/04/musk-settles-sec-suit-accusing-him-of-underpaying-twit...
6•1vuio0pswjnm7•41m ago•3 comments

The 90-year-old idea behind JEPA models: Canonical Correlation Analysis (CCA)

https://shonczinner.github.io/posts/embedding-prediction/
2•kjshsh123•42m ago•0 comments

Meta, TikTok Recv Personal Data from Health Exchanges Alarming Privacy Experts

https://www.bloomberg.com/features/2026-healthcare-advertising-trackers-privacy/
4•1vuio0pswjnm7•43m ago•0 comments

An LLM agent that runs on any Linux box

https://getclaw.site/#demo
3•kilian-ai•48m ago•0 comments

Continually improving our agent harness

https://cursor.com/blog/continually-improving-agent-harness
2•gmays•48m ago•0 comments

Show HN: A minimalist personal homepage I designed from scratch

https://olzhasshaikenov.com/
2•olzhas23•52m ago•0 comments

Tokens and Dreams

https://charlesleifer.com/blog/tokens-and-dreams/
4•xngbuilds•53m ago•0 comments

AI and the Danger of Cognitive Surrender

https://www.economist.com/business/2026/04/30/ai-and-the-danger-of-cognitive-surrender
5•1vuio0pswjnm7•56m ago•1 comments

Linux, Windows or macOS: Which Operating System to Use in 2026?

https://www.lucasaguiar.xyz/posts/linux-windows-macos-qual-usar-2026/
2•isfttr•1h ago•3 comments

File Approved – File approvals without the back-and-forth

https://fileapproved.com
3•vannventures•1h ago•0 comments

Echon – A Discord alternative built in Tauri/Rust

https://echon-voice.com
2•highest678•1h ago•0 comments

The Art of Operating Systems (2019)

https://denninginstitute.com/pjd/ArtOS2/
4•aragonite•1h ago•0 comments

Amp's GPT 5.5 Model Analysis

https://ampcode.com/models/gpt-5.5
4•goranmoomin•1h ago•0 comments

Pulitzer Prize Winner in International Reporting

https://www.pulitzer.org/winners/dake-kang-garance-burke-byron-tau-aniruddha-ghosal-and-yael-grau...
24•jay_kyburz•1h ago•2 comments

The artful way of the stack-machine

https://www.pepnom.org/post/post.5.may.2026.html
2•mjbq•1h ago•1 comments

Why AI Agents Need Proof Chains, Not Just Logs

https://github.com/rodriguezaa22ar-boop/atlas-trust-infrastructure
4•astra_omnia•1h ago•0 comments