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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!

Text Files as a User Interface

https://ratfactor.com/cards/text-files-as-ui
1•ibobev•15s ago•0 comments

Superkabe vs. Smartlead

1•Richardsonsimon•28s ago•0 comments

AI, Tractors, and the Productivity Paradox

https://read.technically.dev/p/the-ai-productivity-paradox
1•gurjeet•43s ago•0 comments

PushWard – Hosted APNs gateway for iOS Live Activities, with open-source bridges

https://pushward.app
1•devseccarry•2m ago•0 comments

The Next Generation of Eventide – shaped by a decade of event sourcing

https://blog.eventide-project.org/articles/the-next-generation-of-eventide/
1•sbellware•3m ago•1 comments

Mojo Release v1.0.0b1

https://mojolang.org/releases/v1.0.0b1/
1•visheshdembla•3m ago•0 comments

Brazil's Pix Payment System Faces Pressure from Visa and Mastercard

https://www.elciudadano.com/en/brazils-pix-payment-system-faces-pressure-from-visa-and-mastercard...
2•wslh•4m ago•0 comments

After AI, Coordination

https://faingezicht.com/articles/2026/05/04/after-ai-coordination/
1•mooreds•5m ago•0 comments

Designers Are Having Fun. Again

https://metedata.substack.com/p/010-designers-are-having-fun-again
1•young_mete•5m ago•0 comments

Infisical Honey Tokens

https://infisical.com/blog/infisical-honey-tokens
2•vmatsiiako•6m ago•0 comments

Principles for agent-native CLIs

https://twitter.com/trevin/status/2051316002730991795
2•blumpy22•7m ago•0 comments

Wind and solar have saved UK from gas imports worth £1.7B since Iran war began

https://www.carbonbrief.org/analysis-wind-and-solar-have-saved-uk-from-gas-imports-worth-1-7bn-si...
3•DamonHD•8m ago•0 comments

Anthropic working on Orbit, its upcoming proactive assistant

https://www.testingcatalog.com/anthropic-is-working-on-orbit-its-upcoming-proactive-assistant/
1•gmays•8m ago•0 comments

Show HN: Bookstoread.ai – Discover non-fiction books using AI

https://bookstoread.ai
1•yotc•8m ago•0 comments

Subquadratic LLM 12 million tokens ctx [video]

https://www.youtube.com/watch?v=kEiuMnosuxU
1•mrkn1•8m ago•0 comments

Publish to Microsoft Store as a company now free

https://blogs.windows.com/windowsdeveloper/2026/05/07/publish-to-microsoft-store-as-a-company-now...
1•pentagrama•8m ago•0 comments

A Message from Unemployment Purgatory

https://inchwyrm.bearblog.dev/message-from-unemployment-purgatory/
1•speckx•9m ago•0 comments

Neal Katyal: "Harvey predicted many of the questions the Justices asked"

https://twitter.com/neal_katyal/status/2052133764940382262
1•asukumar•9m ago•0 comments

Coalton

https://coalton-lang.github.io/
2•tosh•10m ago•0 comments

Show HN: Dear ImGui Bundle: Python and C++ apps for desktop, mobile, and the web

https://github.com/pthom/imgui_bundle
1•pstomi•10m ago•0 comments

Plastic Flowers to Protect the Hive

https://phildini.dev/slopsquatting-for-good
1•phildini•11m ago•0 comments

Show HN: BookedKit, a booking-ready EPK builder for musicians and DJs

https://www.bookedkit.com
1•bookedkit•11m ago•0 comments

Turing Award Winner: Disagreeing with Google, Postgres, Future Problems [video]

https://www.youtube.com/watch?v=YPObBOwIrHk
1•ferryth•12m ago•1 comments

Why Talent Transformation Is the Missing Focus of Enterprise AI

https://www.databricks.com/blog/why-talent-transformation-missing-focus-enterprise-ai
1•mc-serious•12m ago•0 comments

Two player Tetris for VT-100 terminals on vintage Unix [video]

https://www.youtube.com/watch?v=vDSmPMDjP08
1•GaryBluto•15m ago•0 comments

LPython: High performance typed Python compiler

https://lpython.org/
1•tosh•16m ago•0 comments

Can Intrusion Detection for EV Powertrain Networks

https://www.mdpi.com/2079-9292/15/9/1788
1•PaulHoule•16m ago•0 comments

NYC's Multibillion-Dollar Black Box Contracts

https://nysfocus.com/2026/05/06/new-york-city-contracting-master-agreements
1•h2si•17m ago•0 comments

Quantizing Tangent Frames

https://zeux.io/2026/04/30/quantizing-tangent-frames/
1•ibobev•17m ago•0 comments

Testing Vue Components in the Browser

https://jvns.ca/blog/2026/05/02/testing-vue-components-in-the-browser/
2•ibobev•19m ago•0 comments