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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!

Most ArXiv papers contain information never meant to be shared

https://www.nature.com/articles/d41586-026-02057-8
1•bookofjoe•2m ago•1 comments

Foreign Words English Should Steal Immediately

https://commonplacefacts.com/2026/07/11/foreign-words-english-needs/
1•theanonymousone•4m ago•0 comments

World oil demand set for first annual decline since 2020, IEA says

https://www.cnbc.com/2026/07/10/iea-world-oil-demand-declines-iran-war.html
1•geox•6m ago•0 comments

Introduction to Reinforcement Learning and Its Role in LLMs

https://huggingface.co/learn/llm-course/en/chapter12/2
1•tosh•9m ago•0 comments

Fable 5 made a Fireship Video for GPT 5.6 Sol

https://www.youtube.com/watch?v=cSsVNtGPOIg
1•mesmertech•9m ago•1 comments

Forking an Open Source Project

https://codeblog.jonskeet.uk/2026/07/11/forking-an-open-source-project/
1•ingve•10m ago•0 comments

Rollup Table

https://questdb.com/glossary/rollup-table/
1•tosh•11m ago•0 comments

FAA approves first space mirror

https://spacenews.com/fcc-approves-first-reflect-orbital-satellite/
1•stogot•13m ago•1 comments

Reimplementing pf as an eBPF/XDP dataplane on Linux

https://blog.nfsensei.org/the-packet-filter-reborn.html
1•882542F3884314B•14m ago•0 comments

CyberNom: Self-Hosted Threat Intel and SoC Monitoring Platform, Single Go Binary

https://github.com/Hayder-Rzaigui/cybernom-community
1•Hayderrr•15m ago•0 comments

G# – A modern .NET language with Go, Kotlin, and Swift ergonomics

https://davidobando.github.io/gsharp/
1•serial_dev•19m ago•0 comments

Semantic/Hybrid Search in the Browser

https://bart.degoe.de/semantic-search-in-your-browser/
2•bartdegoede•19m ago•0 comments

Show HN: Browser-only tools with no uploads and no accounts

https://toolsdeck.app/
1•biplabwagle•20m ago•0 comments

Two Database Migrations and a Divorce

https://usefathom.com/blog/two-database-migrations-and-a-divorce
1•tosh•23m ago•0 comments

Show HN: Sfotty Pie – A browser-based Atari 8-bit emulator in TypeScript

https://a8.aygun.me
1•cyco130•25m ago•0 comments

If You Want Taste, You're Gonna Have to Eat

https://jxnl.co/writing/2026/07/05/taste/
3•JumpCrisscross•34m ago•0 comments

Ask HN: What are some of the use-cases of the frontier models's max mode?

1•avinoth•36m ago•0 comments

Show HN: Mtg – Arcade games for the terminal, in Rust with Ratatui

https://github.com/modern-terminal-games/mtg
2•funnyfoobar•38m ago•0 comments

The Restraint Problem

https://bartkolendowski.com/writing/the-restraint-problem.html
3•riskcomplex•40m ago•1 comments

Steve Jobs: Let's force Amazon to use our payment system (2010)

https://twitter.com/TechEmails/status/1438188756738191362
1•downbad_•43m ago•1 comments

Show HN: A Figma file viewer for the 333 MHz Sony PSP

https://pocketjs.dev/blog/pocket-figma/
3•doodlewind•48m ago•1 comments

Alice and Mirror Alice [short story]

https://forum.effectivealtruism.org/posts/HtcQcQcTGqhpCJoiY/alice-and-mirror-alice-short-story
1•ClosedPistachio•50m ago•0 comments

Temper – A programming language for libraries translated to all the others

https://github.com/temperlang/temper
1•modinfo•52m ago•0 comments

Networking and the Internet, from First Principles

https://fazamhd.com/mental-models/networking/
47•faza•53m ago•21 comments

Show HN: Yqr – jq-style YAML tool that preserves comments and formatting

https://github.com/zoosky/yqr
1•akapaka•56m ago•1 comments

AI takes two-thirds of venture money, and your odds are still one in six

https://okaneland.com/study/ai-startup-raise-math/
2•ermantrout•57m ago•0 comments

Show HN: Hidetext.sh – encrypted pastebin where the server never sees the key

https://hidetext.sh
1•hidetext•59m ago•0 comments

I guess most useful extention on Chrome for readers I downloaded

https://chromewebstore.google.com/detail/readback-–-save-reading-p/pomfhagjojbnfmgmldkpakfggpdp...
1•scionhat•1h ago•0 comments

New How 3 Years of Experimenting Helped Me Build a Powerful Morning Routine

https://pressearn.it.com/blog/2026/03/11/how-can-i-improve-my-memory-for-studying-2/
1•oibbb•1h ago•0 comments

openpilot 0.11.1

https://blog.comma.ai/0111release/
2•tosh•1h ago•0 comments