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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!

Coulomb's law remains tricky to test at home

https://chillphysicsenjoyer.substack.com/p/coulombs-law-remains-tricky-to-test
1•crescit_eundo•5m ago•0 comments

Browser Isolation Session Initialization Failures – Cloudflare Status

https://www.cloudflarestatus.com/incidents/z16209cfb1xv
1•kyisaiah47•6m ago•0 comments

SayItErmano – local-first voice dictation for Linux

https://github.com/acailic/SayItErmano
1•ilkehimself•10m ago•0 comments

OpenCode team's X analytics leaderboard

https://xrank.opencode.ai/
2•seelos•11m ago•0 comments

Where Understanding Arrives After the Decisions

https://medium.com/@gurvinder372/article-10-where-understanding-arrives-after-the-decisions-310cb...
2•gps372•12m ago•0 comments

Anthropic AI 'formalizes' proof of Fermat's last theorem in just 11 days

https://www.nature.com/articles/d41586-026-02822-9
2•sbulaev•13m ago•0 comments

Zen of Palm [pdf]

https://www.cs.uml.edu/~fredm/courses/91.308-fall05/palm/zenofpalm.pdf
2•hexatron4•13m ago•0 comments

Europe's largest carbon capture facility opens in the Netherlands

https://www.yara.com/corporate-releases/europes-largest-carbon-capture-facility-officially-inaugu...
2•negura•13m ago•0 comments

Made this math/physics learning website, would love some feedback

https://locusmath.org/
2•dinomighty•15m ago•1 comments

Integration of proteomic aging clocks in a phase 2a clinical trial

https://www.nature.com/articles/s41587-026-03286-y
2•spenvo•19m ago•0 comments

Secure temporary file sharing for AI agents and humans

https://github.com/aispace-sh/aispace-client
4•tengio•20m ago•0 comments

Show HN: Brw - better than Claude chrome

https://brw.donworks.co.uk
2•maxrev17•23m ago•0 comments

WeatherNext 3: Our most advanced global weather AI model

https://blog.google/innovation-and-ai/models-and-research/google-deepmind/introducing-weathernext-3/
3•gmays•23m ago•0 comments

Landmark study reveals century-long U.S. suicide rate cycles among youth

https://attheu.utah.edu/health-medicine/landmark-study-reveals-century-long-cycles-in-u-s-suicide...
3•littlexsparkee•26m ago•1 comments

Astrophyzix Integrates NASA API's to Build Advanced Public Tracker Tool

https://www.astrophyzix.com/p/live-asteroid-tracker-v9.html
1•UniverseToday•27m ago•0 comments

Saturday Evening Post Will Stop Printing After 205 Years

https://www.nytimes.com/2026/09/02/business/media/saturday-evening-post-stop-printing.html
2•ripe•27m ago•1 comments

The Full-Source Bootstrap: Building from source all the way down

https://guix.gnu.org/en/blog/2023/the-full-source-bootstrap-building-from-source-all-the-way-down/
1•embedding-shape•28m ago•0 comments

Premium Shop Helpfull

https://www.ebay.com/usr/ilyasseng0
2•ilaysyou•29m ago•3 comments

What are you building? Paste a domain, prove you own it, get listed

https://www.whatareyoubuilding.app/
1•kunalpanchal•31m ago•0 comments

Have You Ever Seen the Rain?

https://christopherren.substack.com/p/have-you-ever-seen-the-rain
2•lookatdata•39m ago•1 comments

Open-source 3D anatomy explorer: 2,234 selectable BodyParts3D meshes

https://github.com/ashemag/human-atlas
1•metrofun•39m ago•0 comments

Do you ever struggle to find another programmer to work on a project/pair with?

1•rizsyed1•41m ago•0 comments

2025 Dodge Charger EV: Regular Car Reviews [video]

https://www.youtube.com/watch?v=0jZVP_ZA3ZY
2•fortran77•41m ago•1 comments

TALA Is Open-Source

https://d2lang.com/blog/tala-is-open-source/
7•alixanderwang•42m ago•1 comments

Show HN: Explore the fun side of the personal web

https://straw.page/explore
2•chickenman•45m ago•0 comments

Show HN: Archprint, infer architecture lint rules from your repo's import graph

https://github.com/Tommkruix/archprint
1•Tommkruix123•46m ago•0 comments

Unauthenticated RCE in Telerik UI

https://tantosec.com/blog/2026/09/telerik-padding-oracle-to-shell/
1•dwbzn•47m ago•0 comments

Show HN: Browse 27 years of movie ticket stubs in ThreeJS

1•zebomon•47m ago•0 comments

I kept working on Windows Notepad for Mac

https://github.com/Arijit-gotsomecodes/NotePadMac
1•fxxai•49m ago•1 comments

The Impacts of Guaranteed Basic Income on Crime Perpetration and Victimization

https://www.nber.org/papers/w34547
2•stinkbeetle•50m ago•0 comments