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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!

You were born without an account

https://simplex.chat/why/
1•Cider9986•33s ago•0 comments

Harbor: Evaluate Agents in Sandboxed Environments

https://www.harborframework.com/
1•stefanpie•1m ago•0 comments

This Month in Ladybird – September 2026

https://ladybird.org/newsletter/2026-09-30/
2•exploraz•3m ago•0 comments

Find the flattest route between any two points in SF

https://flattensf.com/
1•ishan0102•5m ago•0 comments

Google Wallet for Android adds 12th digital U.S. state ID

https://9to5google.com/2026/10/05/google-wallet-id-oklahoma/
1•devy•6m ago•1 comments

Why journalism startups fail–and what investors should know

https://capitalstacks.media/report/buschow
1•doener•10m ago•0 comments

Against Death: A Cybernetic Manifesto

https://docs.google.com/document/d/1J_R9qc-J0SRd4XMTU4TLIfoKJlVMBNYbHBgfPXxVs5k/edit?usp=sharing
1•shaunxcode•10m ago•0 comments

Laravel Rust Is Coming

https://twitter.com/taylorotwell/status/2107117389762515319
1•criexe•11m ago•0 comments

Top Consumer AI Apps

https://www.a16z.news/p/top-100-consumer-ai-apps-seventh
1•svobodamartin•13m ago•0 comments

A Fond Farewell to Three Rust Foundation Colleagues

https://rustfoundation.org/media/a-fond-farewell-to-three-rust-foundation-colleagues/
2•wslh•13m ago•0 comments

Computer Graphics: Past to Present

https://taosengine.com/docs/graphics/index.html
1•mariuz•14m ago•0 comments

Agent Memory Repo

https://cognition.com/agent-memory-repo
1•handfuloflight•14m ago•0 comments

Is What We're Watching True or False?

https://www.newyorker.com/culture/on-television/is-what-were-watching-true-or-false
1•bookofjoe•16m ago•1 comments

Show HN: Ototo: A tool to offload code exploration to a smaller model

https://ototo.dev/
1•schoenobates•20m ago•0 comments

Mobile-first SCUMM-style point-and-click engine

https://github.com/wanoo/web-scumm
1•plaguna•20m ago•0 comments

Show HN: I recreated "Crazy Ones" ad as an animated web tribute to Steve Jobs

https://crazy.eyad.com/
1•eyadnour•21m ago•0 comments

Wealth Against Commonwealth (1994)

https://en.wikipedia.org/wiki/Wealth_Against_Commonwealth
1•_doctor_love•22m ago•0 comments

Not a Wedding Crasher

https://www.notaweddingcrasher.com/
2•gregsadetsky•22m ago•0 comments

Turkey's 20B ponzi scheme collapsed

https://www.reuters.com/world/middle-east/how-turkeys-investment-fund-bubble-burst-2026-10-02/
3•xkcd1963•22m ago•0 comments

Which brain computer interface is better for research in 2026

https://ildarr2016.medium.com/pieeg-vs-openbci-emotiv-and-muse-an-honest-founders-comparison-acbf...
1•Christiangmer•23m ago•0 comments

Why your Claude Code routine reported success and did nothing

https://runbook.scosovan.com/claude-code-routine-reported-success-did-nothing/
1•guidohatzis•25m ago•0 comments

At-Protocol Based Encrypted Firmware Management Project

https://github.com/ListeningPost/open-firmware-manager
1•anonymous-aliga•28m ago•1 comments

CIA Report Warns Israel Could Head Toward Civil War, Total Collapse

https://www.dropsitenews.com/p/cia-report-israel-civil-war-collapse
5•lorecore•29m ago•0 comments

Dust: Pretraining Transformers Without Backpropagation

https://qlabs.sh/research/dust
5•E-Reverance•31m ago•0 comments

Exit interviews with defectors from OpenAI, Anthropic, and DeepMind

https://nymag.com/intelligencer/article/ai-researchers-quit-openai-anthropic.html
2•MBlume•31m ago•0 comments

Nix on the Steam Frame

https://johns.codes/blog/nix-on-steam-frame
1•ibobev•34m ago•0 comments

Show HN: Sideloop – Re-sign sideloaded iOS apps over Wi-Fi before they expire

https://github.com/filippofinke/sideloop
1•filippofinke•35m ago•0 comments

Testing AI on Real-World Tasks

https://www.vals.ai/home
2•doener•35m ago•0 comments

F1 in Bahrain in Malaysia: The race needed a software update to start

https://arstechnica.com/cars/2026/10/f1-in-bahrain-in-malaysia-the-race-needed-a-software-update-...
1•dnw•35m ago•1 comments

You don't need an effect system

https://burningwitness.github.io/blog/posts/against-effect-systems/
2•ibobev•36m ago•0 comments