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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!

The Death of the Software Developer

https://aimakesmesad.com/the-death-of-the-software-developer/
1•Rudism•3m ago•0 comments

Tangled · The next-generation social coding platform

https://tangled.org
1•antfarm•5m ago•0 comments

Ask HN: What did you learn last month? (June 2026)

1•bhu1st•5m ago•0 comments

PgGraph: Transform your Postgres data to graphs

https://github.com/Evokoa/pgGraph
1•handfuloflight•6m ago•0 comments

Freya 0.4 – Rust GUI library

https://freyaui.dev/posts/0.4
2•birdculture•7m ago•0 comments

In Germany if you say a restaurant is just ok they send the gestapo after you

https://twitter.com/eigen_moomin/status/2077471686295957749
2•bko•8m ago•0 comments

Orchflows: Build self-improving loops in one sentence

https://github.com/DanMcInerney/orchflows
2•DanMcInerney•11m ago•0 comments

Lucy 2.5 – Realtime Video Editing via World Model

https://lucy.decart.ai/
1•ProjectBarks•14m ago•0 comments

British runner Josh Kerr smashes 27-year-old men's mile record

https://www.espn.com/olympics/story/_/id/49391430/british-runner-josh-kerr-smashes-27-year-old-me...
1•linuxfan2718•15m ago•0 comments

Controlling Reasoning Effort in LLMs

https://magazine.sebastianraschka.com/p/controlling-reasoning-effort-in-llms
1•matt_d•15m ago•0 comments

New Drone Nearly Disappears in Flight

https://www.youtube.com/watch?v=1mUgyV3A1O0
1•bookofjoe•25m ago•1 comments

The Kimi K3 Moment

https://stephen.bochinski.dev/blog/2026/07/18/the-kimi-k3-moment/
1•sbochins•29m ago•0 comments

Sushi – Your Raw Data Served Perfectly

https://trysushi.xyz
2•premxai•30m ago•0 comments

A 30-year-old open problem in complexity theory resolved by GPT-5.6 Pro

https://zenodo.org/records/21431468
1•bmisterxster•31m ago•0 comments

Palantir Durable Agents

https://www.youtube.com/playlist?list=PLSoYzKs38mqI
1•pascal-maker•32m ago•0 comments

Goodbye, and Thanks for All the Bikesheds

https://queue.acm.org/detail.cfm?id=3818307
13•Ygg2•34m ago•1 comments

Direct H2 generation from mixed plastic waste via alkaline thermal treatment

https://www.pnas.org/doi/10.1073/pnas.2537552123
1•bookofjoe•37m ago•0 comments

An uroboros program with 100 programming languages

https://github.com/mame/quine-relay
2•modinfo•37m ago•0 comments

Overtraining as the path to human-like AI

https://www.seangoedecke.com/overtraining-as-the-path-to-human-like-ai/
3•Brajeshwar•37m ago•0 comments

We Built a Multiplayer Code Editor with Cloudflare, Yjs, and CodeMirror

https://coderscreen.com/blog/building-multiplayer-code-editor-cloudflare-yjs-codemirror
2•rogutkuba•38m ago•0 comments

Show HN: Todowing – A browser extension that shows Todoist sub-tasks inline

https://todowing.com/
1•vivgui•42m ago•0 comments

AI's new political donor class is outspending Big Tech's last one

https://sfstandard.com/2026/07/18/ai-s-new-political-donor-class-already-outspending-big-tech-s-l...
4•roddylindsay•43m ago•0 comments

Polybius: The Most Dangerous Arcade Game Ever Made. A Dive into Some Arcade Lore

https://lowendbox.com/blog/polybius-the-most-dangerous-arcade-game-ever-made-a-deep-dive-into-som...
2•bananamogul•44m ago•1 comments

SadServer Solutions

https://www.vladimircicovic.com/2024/06/sadserver-solutions
2•taubek•46m ago•0 comments

Strange loops: from autological words and quines to consciousness

https://www.youtube.com/watch?v=MFR6SMV64h4
1•modinfo•47m ago•0 comments

The Human Worker as Civilizational Nexus

https://read.lukeburgis.com/p/the-human-worker-as-civilizational
2•momentmaker•50m ago•0 comments

Food Never Come – no calories, no bill, just dopamine

https://foodnevercome.com/
1•appreciatorBus•50m ago•1 comments

Stately Agent: Build agents as state machines

https://github.com/statelyai/agent
2•handfuloflight•50m ago•0 comments

Apple bug crashes apps that display Telugu character (2018)

https://www.theguardian.com/technology/2018/feb/16/apple-bug-crashes-apps-that-display-telegu-cha...
1•thunderbong•53m ago•0 comments

Show HN: Warden – authorization gateway for agentic RAG

https://github.com/geminimir/warden
2•geminimir•54m ago•0 comments