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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•1y 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!

Ask HN: What's the biologic equivalent of allowing any two cells communication

1•datas•26s ago•0 comments

Lost Builds – unreleased game archive

https://lost-builds.byartem.com/
1•dublor•2m ago•0 comments

I trained a 360M model to pretend to be a terminal

https://simedw.com/2026/10/21/world-model-terminal/
2•alphax314•3m ago•0 comments

Claude Now Works with Google Docs, Sheets, and Slides

https://claude.com/resources/articles/claude-now-works-in-google-docs-sheets-and-slides
2•gmays•4m ago•0 comments

OpenVAF – Open-source Verilog-A compiler in Rust

https://github.com/pascalkuthe/OpenVAF
2•peter_d_sherman•4m ago•0 comments

LLM Agents Play Pokemon Showdown

https://olivergrabner.com/research/pokemon/
3•grabnero•8m ago•0 comments

Built Once, Serves Many: How We Rebuilt Experiment Analysis Platform at Roku

https://engineering.roku.com/built-once-serves-many-how-we-rebuilt-experiment-analysis-platform-a...
1•newadays•11m ago•0 comments

Exploring the Use of WebAssembly in HPC (2023)

https://dl.acm.org/doi/abs/10.1145/3572848.3577436
1•measurablefunc•14m ago•0 comments

Ask HN: Is OpenAI down? Nonstop 429s on pro subscription

1•srcreigh•16m ago•1 comments

Show HN: Find duplicates in 5 lines of Python (offline, lightweight, fast, Rust)

https://github.com/leopoldch/univo
1•jweaz•17m ago•0 comments

See Inside Cells Like Never Before in These Vivid Microscopic Images

https://www.quantamagazine.org/see-inside-cells-like-never-before-in-these-vivid-microscopic-imag...
2•randomImmigrant•18m ago•1 comments

The World Question Center, 1998 What Questions Are You Asking Yourself?

https://www.edge.org/conversation/james_lee_byars-the-world-question-center-1998
2•andsoitis•18m ago•0 comments

Can AI generate reliable product demos directly from source code?

1•demovexa•18m ago•0 comments

Claude Security now scans continuously and tracks fixes

https://claude.com/resources/articles/claude-security-now-scans-continuously-and-tracks-fixes
1•arbayi•20m ago•0 comments

AI Overlay that Lives on your Desktop

https://www.lumenoverlay.com
1•ayviatefn•20m ago•0 comments

Physicist Christopher Stubbs Joins Anthropic's Long-Term Benefit Trust

https://www.anthropic.com/news/christopher-stubbs-joins-long-term-benefit-trust
1•arbayi•23m ago•0 comments

Milwaukee Brewers renege on golden tickets sold in 2016

https://twitter.com/emilymaeheller/status/2112719895519514992
2•lando2319•26m ago•0 comments

Widespread PHP Flaw May Cause Many Site Outages Today

https://krebsonsecurity.com/2026/10/widespread-php-flaw-may-cause-many-site-outages-today/
1•MadrasThorn•27m ago•0 comments

DNA Genealogy IDs Victim from 1997 Florida Cold Case

https://www.forensicmag.com/3594-All-News/628824-Othram-Helps-ID-Victim-from-1997-Florida-Cold-Case/
1•WaitWaitWha•29m ago•0 comments

Epic vs. Apple AU:Court Orders Alt App Stores,Sideloading and 3rd Party Payments

https://www.judgments.fedcourt.gov.au/judgments/Judgments/fca/single/2026/2026fca1552
2•Mayzie•30m ago•0 comments

HN: Kerf – if Burp, Wireshark, and Dependabot had a kid

https://kerf.software
1•openpost•42m ago•0 comments

Amazon warns new cyber flaws detected using AI are being 'broadly exploited'

https://www.ft.com/content/245778d9-597b-492d-b5b6-a2967c77e853
1•nprateem•43m ago•0 comments

LCOS 0.9.5 Has Landed

https://lunduke.substack.com/p/lcos-095-has-landed
1•onemoresoop•43m ago•0 comments

New World screwworm cases confirmed in wildlife in Texas, beef cow in New Mexico

https://www.reuters.com/business/healthcare-pharmaceuticals/us-agriculture-dept-confirms-first-de...
2•bushwart•45m ago•0 comments

Personal Agent Protocol

https://sierra.ai/blog/introducing-personal-agent-protocol
3•gmays•47m ago•0 comments

Record κ=1.788⋅10^−3 for Fourier Transform

https://github.com/bigospeedrun/verifier/blob/607121a796548005a238a6e63589de866c9ab6f6/submission...
1•aleph_minus_one•49m ago•1 comments

Show HN: HarnessHive – collaborative wiring harness design platform in browser

https://harnesshive.com
1•danielkopelke•49m ago•0 comments

Show HN: GitPushups, block your code if you don't do pushups during your workday

https://gitpushups.com
2•higgins•53m ago•0 comments

Zac-OS-9: The classic Platinum desktop, reborn for modern PCs

https://sourceforge.net/projects/zac-os-9/
3•felixding•54m ago•0 comments

Creative success will not fill the hole in your heart

https://herbertlui.net/creative-success-will-not-fill-the-hole-in-your-heart/
2•herbertl•54m ago•0 comments