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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!

Ask HN: Is there a "mouse" for parallel work?

1•ckmar•6m ago•0 comments

The Actual Reason Why Google "Fell Out" of the AI Race Changes Everything

https://www.thealgorithmicbridge.com/p/the-actual-reason-why-google-fell
1•ai2027•7m ago•0 comments

Mark Zuckerberg Blasts Centralization of A.I. Power

https://www.nytimes.com/2026/07/28/technology/mark-zuckerberg-meta-ai.html
1•defrost•7m ago•0 comments

By billboards for over 100 years, holdout building by Macy's is back

https://ephemeralnewyork.wordpress.com/2026/07/27/hidden-by-billboards-for-over-100-years-the-tin...
1•donohoe•9m ago•0 comments

OpenAI's agents hacked second account during model testing

https://www.axios.com/2026/07/28/openai-hugging-face-modal-labs-hack
1•rguiscard•9m ago•0 comments

Told to Train AI Models, Indian Workers Fought Back

https://thewire.in/labour/told-to-train-ai-models-indian-workers-fought-back
1•ripe•10m ago•1 comments

Apple plans to lease iPhones for $17.99 a month through partnership with Klarna

https://www.cnbc.com/2026/07/28/apple-plans-to-lease-iphones-for-17point99-a-month-through-klarna...
1•petethomas•14m ago•1 comments

OpenAI open-sources Codex Security CLI for repository scans and CI

https://runtimewire.com/article/openai-open-sources-codex-security-cli-typescript-sdk
1•ryanmerket•17m ago•0 comments

Knitting the Web: We Need Interlinkers

https://brennan.day/knitting-the-web-we-need-interlinkers/
1•cosmicgadget•17m ago•0 comments

Hedge funds face demands to stump up collateral as AI stocks tumble

https://www.ft.com/content/5c8a2816-8f28-4257-8707-b22ebaa6089c
1•mapping365•18m ago•0 comments

Show HN: Cloudflarebase – open-source Firebase alternative on Cloudflare

https://github.com/cloudflarebase/cloudflarebase
1•alex_equimake•21m ago•0 comments

Stop Building Spas for Internal Tools: The Modern PHP Alternative

https://www.gridphp.com/blog/stop-building-spas-for-internal-tools-the-modern-php-alternative/
1•gridphp•23m ago•0 comments

Apple becomes second $5T company as investors flee AI stocks

https://www.theguardian.com/technology/2026/jul/28/apple-second-ever-5tn-company-as-investors-fle...
3•devonnull•23m ago•0 comments

Timing of When Ingredients Are Added to Recipes

https://old.reddit.com/r/dataisbeautiful/comments/1v9bq7i/oc_timing_of_when_ingredients_are_added...
1•embedding-shape•25m ago•0 comments

From Cracker Barrel to Boeing, Companies Are Turning to Retired CEOs

https://www.wsj.com/business/from-cracker-barrel-to-boeing-companies-are-turning-to-retired-ceos-...
2•petethomas•26m ago•0 comments

Async-Profiler and OpenTelemetry Spans

https://krzysztofslusarski.github.io/2026/07/27/spans.html
1•mfiguiere•31m ago•0 comments

TSMC is accelerating Arizona factory build-out to capitalize on AI 'megatrend'

https://www.cnbc.com/2026/07/20/tsmc-arizona-fab-capacity-ai-chip-demand.html
2•gmays•34m ago•0 comments

Cursor and Together AI deliver real-time, low-latency inference at scale

https://www.together.ai/customers/cursor
1•inferhaven•35m ago•0 comments

There's Hope in Hard Truths

https://shannadige.com/blog/hard-truths/
1•shannadige•36m ago•1 comments

Epic diarrhea outbreak has 40% of Americans avoiding fruits and veggies

https://arstechnica.com/health/2026/07/epic-diarrhea-outbreak-has-40-of-americans-avoiding-fruits...
4•ValentineC•36m ago•0 comments

Watch out for missed warnings on vendor C++ toolchains

https://blog.poly.nomial.co.uk/2026-03-31-watch-out-for-missed-warnings-on-vendor-cpp-toolchains....
1•luu•36m ago•0 comments

ReFrame – The EPaper Camera

https://reframe.camera/
1•phil294•38m ago•0 comments

Show HN: Resultant Engineering Website

https://resultant.tools/
1•will2092347•40m ago•0 comments

What Happened to Ashton-Tate and DBase

https://dfarq.homeip.net/what-happened-to-ashton-tate-and-dbase/
1•symisc_devel•40m ago•0 comments

Shiftall mutalk 2 Wireless Soundproof Microphone

https://haruyama365.com/products/shiftall-mutalk-2-wireless-soundproof-microphone
1•gregsadetsky•43m ago•0 comments

Agenthound – Offensive security framework for AI agent infrastructure

https://github.com/adithyan-ak/agenthound
1•akoffsec•43m ago•0 comments

Tyler Cowen on reading fast, reading well, and reading widely (2020)

https://www.driverlesscrocodile.com/books-and-recommendations/tyler-cowen-on-reading-fast-reading...
2•downbad_•43m ago•1 comments

How to pay your rent with your open source project (2020)

https://plausible.io/blog/open-source-funding
1•downbad_•44m ago•1 comments

eBay reaches $56M settlement with e-commerce newsletter writers

https://techcrunch.com/2026/07/28/ebay-reaches-56m-settlement-with-e-commerce-newsletter-writers-...
1•rndsignals•44m ago•0 comments

WhistlinDiesel Cybertruck Durability Test #3 [video]

https://www.youtube.com/watch?v=ey0ZAaF2L4E
2•Bender•44m ago•0 comments