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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!

Irrational philistine "education" has won

https://pietersz.co.uk/2026/05/irrational-philistine-education-has-won
1•graemep•35s ago•0 comments

Building a Distributed Bandwidth Allocation Algorithm in Public

1•pixelfound•1m ago•0 comments

GoPro Q1 2026: gross margin went from 32% to 4.5% in one year, exploring a sale

https://finance.yahoo.com/quote/GPRO/earnings/GPRO-Q1-2026-earnings_call-552481.html
1•Lwrless•4m ago•0 comments

For Residents of Jurisdictions with Age Verification Laws

https://dianne.skoll.ca/projects/california.php
1•vslira•5m ago•0 comments

Men Are Shit.

https://www.kommunikationsliebe.org/en/post/men-are-shit/
1•rendx•5m ago•0 comments

Venera 7

https://en.wikipedia.org/wiki/Venera_7
2•thunderbong•11m ago•0 comments

We open sourced another feature of our commercial EDR Show us love

1•SilverPlate3•11m ago•0 comments

Liverpool and Manchester Railway

https://en.wikipedia.org/wiki/Liverpool_and_Manchester_Railway
1•daverol•12m ago•0 comments

Free US expat tax calculators (no signup, static HTML)

https://www.clearedexpat.com/
2•advsign•13m ago•0 comments

The slop cannons in your engineering org

https://handyai.substack.com/p/the-slop-cannons-in-your-engineering
3•meysamazad•15m ago•0 comments

RescueRadar – UK Emergency Services Flight Tracking Since 2013

https://rescueradar.co.uk/about
1•dp-hackernews•17m ago•0 comments

So what is Open Source Software in a Source Available Software world? (2025)

https://www.unsungnovelty.org/posts/10/2025/oss-and-sas/
1•meysamazad•17m ago•0 comments

Trump Mobile Leaks Customers' Data and the Phone Isn't Even Out Yet

https://gizmodo.com/trump-mobile-leaks-customers-data-and-the-phone-isnt-even-out-yet-2000762600
7•pavel_lishin•17m ago•1 comments

Ruby for Good

https://ti.to/codeforgood/rubyforgood
2•mooreds•19m ago•0 comments

Why the gradient is a list of partial derivatives

https://blog.michalprzadka.com/posts/list-of-partial-derivatives/
5•keyraycheck•21m ago•0 comments

When (if ever) it's appropriate to make jokes before the US Supreme Court

https://www.scotusblog.com/2026/05/when-if-ever-its-appropriate-to-make-jokes-take-selfies-or-cur...
3•mooreds•21m ago•0 comments

50:50 Startups is a catalyst for positive change in the Middle East

https://www.5050startups.org
2•mooreds•22m ago•0 comments

Habits for Americans in an Age of Disruption

https://www.city-journal.org/article/ben-sasse-manhattan-institute-americans-habits
3•moviet•23m ago•0 comments

User level WireGuard for UDP based encryption and authentication

https://utcc.utoronto.ca/~cks/space/blog/tech/WireGuardForUDPAuthEncryption
1•blenderob•23m ago•0 comments

Three Years On: Analysing Advent's Maxar Acquisition

https://newsletter.terrawatchspace.com/three-years-on-analysing-advents-maxar-acquisition/
1•marklit•24m ago•0 comments

Usborne 1980s Computer Books

https://usborne.com/us/books/computer-and-coding-books
2•ngram•25m ago•0 comments

No Juniors Today, No Seniors in 2031

https://www.fbritoferreira.com/blog/no-juniors-today-no-seniors-in-2031/
1•fbritoferreira•26m ago•0 comments

Show HN: Strudel – Generate commit messages via Apple's on-device LLM

https://github.com/Mechse/strudel
4•Mechse•26m ago•0 comments

Three Years of Abstractionless C

https://replicated.wiki/blog/abc
1•gritzko•26m ago•0 comments

BFId: Identity Inference Attacks Utilizing Beamforming Feedback Information

https://dl.acm.org/doi/10.1145/3719027.3765062
1•bookofjoe•27m ago•0 comments

FutureMi – Scheduled Messages

https://play.google.com/store/apps/details?id=com.otijiudezealexander.futuremi&hl=en_US
1•Nightcharm6•28m ago•0 comments

Peruse 332,144 pages of UFO files and videos with your thumb

https://hypergrid.systems/war.gov-ufo-viewer/microfilm5
1•keepamovin•29m ago•0 comments

HTML-in-Canvas WebGL Demos

https://chrome.dev/html-in-canvas/
1•arnejenssen•29m ago•1 comments

Advanced Shader Delivery on RX 9070 XT: up to 95% faster load times

https://www.tomshardware.com/pc-components/gpus/we-tested-advanced-shader-delivery-on-the-rx-9070-xt
1•sbulaev•31m ago•0 comments

Of Course They Booed

https://2ndbreakfast.audreywatters.com/of-c/
5•cdrnsf•41m ago•0 comments