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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!

IEA: Solar overtakes all energy sources in a major global first

https://electrek.co/2026/04/19/iea-solar-overtakes-all-energy-sources-in-a-major-global-first/
1•Klaster_1•1m ago•0 comments

Libero – Gleam Library Renders REST Obsolete for Spas and Erlang-Based Clients

https://github.com/pairshaped/libero
1•MrJulia•3m ago•0 comments

Intel refreshes non-Ultra Core CPUs with new silicon for the first time

https://arstechnica.com/gadgets/2026/04/intels-non-ultra-core-cpus-are-new-silicon-this-year-for-...
2•rbanffy•6m ago•1 comments

Brave Premium

https://account.brave.com/?intent=checkout&product=origin
1•lijialjun•7m ago•0 comments

Forward Guidance with Mark Carney [video]

https://www.youtube.com/watch?v=uk2TZwkhi4E
1•pedalpete•8m ago•1 comments

A Crossroad at a Branch

http://www.vex.net/~trebla/haskell/crossroad.xhtml
1•sph•8m ago•0 comments

Ask HN: Scanslop.com on Reddit a Privacy Nightmare?

1•znpy•8m ago•0 comments

Viral Takeover [video]

https://www.youtube.com/watch?v=Cvb1mg2GxsY
1•alex1138•9m ago•0 comments

How Long Poop Stays in Your Body May Impact Your Health, Study Finds

https://www.sciencealert.com/how-long-poop-stays-in-your-body-may-impact-your-health-study-finds
3•mikhael•13m ago•0 comments

Show HN: VS Code extension that predicts Git merge conflicts before they happen

https://marketplace.visualstudio.com/items?itemName=SukantaSaha.mergeguard
1•lalata•13m ago•1 comments

Show HN: Translate LLM API Calls Across OpenAI, Anthropic, and Gemini

https://github.com/Oaklight/llm-rosetta
1•Oaklight•15m ago•0 comments

Just like phishing for gullible humans, prompt injecting AIs is here to stay

https://www.theregister.com/2026/04/19/just_like_phishing_for_gullible/
1•beardyw•16m ago•0 comments

OpenAI Executive Kevin Weil Is Leaving the Company

https://www.wired.com/story/openai-executive-kevin-weil-is-leaving-the-company/
1•joozio•18m ago•0 comments

Topology Meets Machine Learning: The Euler Characteristic Transform [pdf]

https://www.ams.org/journals/notices/202507/rnoti-p719.pdf
1•ganitam•20m ago•0 comments

Our Project Hail Mary: The Observability Setup Behind an Observability Tool

https://newsletter.signoz.io/p/our-project-hail-mary-the-observability
1•elza_1111•21m ago•0 comments

Why don't centre-pivot irrigation fields use hexagonal packing?

https://old.reddit.com/r/geography/comments/1sqedsf/why_dont_centrepivot_irrigation_fields_use/
2•calcsam•21m ago•0 comments

Diagnosing Random MariaDB Freezes on Frappe Cloud

https://frappe.io/blog/frappe-cloud/diagnosing-random-mariadb-freezes-on-frappe-cloud
1•TanmoySarkar•21m ago•0 comments

BreachForums logs reveal anonymizers of choice for shady characters

https://www.okta.com/blog/threat-intelligence/blocking_shady_network/
1•Cider9986•22m ago•1 comments

Ray Optics Simulation

https://phydemo.app/ray-optics/
2•the-mitr•23m ago•0 comments

The logical trap: why blocking "cheap" ads crashed my RPM by 60%

https://webmatrices.com/post/the-logical-trap-why-blocking-cheap-ads-crashed-my-rpm-by-60
1•bishwasbh•23m ago•0 comments

GitNexus: Client-side knowledge graph creator that runs in the browser

https://github.com/abhigyanpatwari/GitNexus
2•saikatsg•25m ago•0 comments

Ask HN: Kernel debugging on Apple Silicon

1•dirtb1ke•28m ago•1 comments

Unofficial List of Siri Commands

https://github.com/extratone/siri
1•ryan-ca•32m ago•0 comments

Businesses can claim refunds for tariffs declared unconstitutional

https://apnews.com/article/tariff-refund-trump-customs-08861f153801156d213c30c4e2f6a683
2•geox•33m ago•1 comments

The great Scouse pasty war

https://www.livpost.co.uk/the-great-scouse-pasty-war/
1•DamonHD•35m ago•0 comments

NASA working on 'Big Bang' upgrade to keep the Voyagers alive for longer

https://www.theregister.com/2026/04/20/voyager_big_bang_upgrades/
3•beardyw•37m ago•0 comments

The Interpretive Advantage [video]

https://www.youtube.com/watch?v=-6no6N3i9Tg
1•tosh•39m ago•0 comments

Anthropic's in-house philosopher thinks Claude gets anxious

https://twitter.com/itsolelehmann/status/2045578185950040390
3•thdr•41m ago•1 comments

Prometheus Exporter for RDMA (RoCE) NIC Statistics in Linux

https://github.com/yuuki/rdma_exporter
2•y_uuki•47m ago•0 comments

Convert WebP to JPG Online Free

https://www.wps.com/tools/webp-to-jpg/
2•jakemorgan•48m ago•1 comments