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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!

CO, FL, GA schools testing pepper-spraying Mithril drones to stop shooters

https://www.cbsnews.com/news/drones-pepper-spray-school-shooters-mithril/
1•_doctor_love•49s ago•0 comments

My Local LLM Scored 6/6. It Was Wrong Every Time

https://markbhall.dev/writing/my-local-llm-scored-6-of-6/
1•jacquesm•1m ago•0 comments

Perspec 1.0 – Desktop app for perspective correction of document photos

https://adriansieber.com/announcing-perspec-1-0/
1•adius•2m ago•1 comments

Ask HN: Stop Looking at Code?

1•grandimam•2m ago•0 comments

After laying off Battlefield 6 devs, CEO gets $38M for Battlefield 6 performance

https://www.pcgamer.com/gaming-industry/after-laying-off-battlefield-6-developers-ea-pays-its-ceo...
2•theanonymousone•4m ago•0 comments

The way GPT-5.6 fuses frontier intelligence with frontier efficiency – OpenAI

https://openai.com/index/gpt-5-6-frontier-intelligence-efficiency/
1•smokeeaasd•8m ago•0 comments

How Podcasts Ruined America

https://www.compactmag.com/article/how-podcasts-ruined-america/
1•ChrisArchitect•8m ago•0 comments

Pip 26.2: –only-deps solves 16 years of app deployment hacks – James O'Claire

https://jamesoclaire.com/2026/07/23/pip-26-2-only-deps-solves-16-years-of-app-deployment-hacks/
2•rbanffy•12m ago•0 comments

Demoscene inspired interactive promo (WebGL)

https://why.zero.university/
2•larodi•12m ago•1 comments

How OpenAI Kills Oracle

https://www.wheresyoured.at/how-openai-kills-oracle/
2•chasil•12m ago•1 comments

Planned Updates to the PyPI User Interface – The Python Package Index Blog

https://blog.pypi.org/posts/2026-07-22-ui-updates/
3•rbanffy•12m ago•0 comments

Security: Line goes up · Hugo van Kemenade

https://hugovk.dev/blog/2026/security-line-goes-up/
1•rbanffy•12m ago•0 comments

Ask HN: Looking for testers for my RAM-based Linux distribution

1•sumtas•13m ago•0 comments

Ask HN: Which Jabber clients support SCRAM+ and XEP-0474?

1•Bender•13m ago•0 comments

Tame Dependabot: Group your updates, slow the cadence, keep security fast

https://github.blog/security/supply-chain-security/tame-dependabot-group-your-updates-slow-the-ca...
1•smokeeaasd•16m ago•0 comments

A fast path for decoding fixed-length lists in Parquet

https://www.morling.dev/blog/fast-path-for-fixed-length-lists-in-parquet/
1•fanf2•18m ago•0 comments

Computer History of Yugoslavia

https://www.oblakodermagazin.rs/it-istorija-jugoslavije/
1•vlad__81•19m ago•0 comments

The Miasma Theory of Education

https://hollisrobbinsanecdotal.substack.com/p/the-miasma-theory-of-education
1•HR01•19m ago•0 comments

Vibe Rot

https://olliegreen.info/posts/13/vibe-rot/
1•Oarch•20m ago•0 comments

The coolest use for the Vision Pro

https://christianselig.com/2026/07/vision-pro-house/
26•robbiet480•21m ago•5 comments

Passkeys are single factor, and why that's (mostly) okay

https://fy.blackhats.net.au/blog/2026-07-23-passkeys-are-single-factor/
1•speckx•24m ago•0 comments

Ada v4: Validating 35.6M URLs per second

https://www.yagiz.co/release-of-ada-v4
1•ingve•25m ago•1 comments

Senior Dev Imposter Syndrome

2•daltonlcarr•27m ago•0 comments

A digital ID that proves a real person is on the other side

https://fravash.ai/
1•RevanDaldaban•27m ago•0 comments

Claude users' shared conversations were showing up in Google searches

https://www.fastcompany.com/91580420/claude-users-shared-conversations-were-showing-up-in-google-...
1•1vuio0pswjnm7•28m ago•1 comments

Darwin Among the Machines(1863)[pdf]

https://publish.fid-media.de/server/api/core/bitstreams/e0da505d-200c-43ab-be4b-6604a4df816f/content
1•kelseyfrog•29m ago•0 comments

Procore to Acquire DroneDeploy for $845M

https://www.dronedeploy.com/blog/procore-to-acquire-dronedeploy-creating-next-generation-platform...
1•datadrivenangel•29m ago•1 comments

Show HN: MindFlock – Parallel AI coding agents, each in its own Git worktree

https://github.com/MindFlock/MindFlock
3•emandel2630•31m ago•1 comments

Transfer context from one agent to another agent mid task

2•iamalizaidi•31m ago•0 comments

URL Design

https://www.jstools.space/blog/url-design-routing-query-parameters-fragments/
2•pentagrama•32m ago•0 comments