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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!

Why A.I. Won't Steal All Our Jobs

https://www.nytimes.com/2026/06/30/opinion/ai-agents-steal-jobs-employment.html
1•reaperducer•1m ago•0 comments

FEOM – Windows GUI automation at 8ms, no GPU needed

https://github.com/a92070888-dev/mcp-os-native-automation
1•a92070888•4m ago•0 comments

PangolinMatrix – write down encoded passwords, not real ones

https://pangolinmatrix.com
1•corvina•6m ago•0 comments

Google reCAPTCHA Reverse Engineered

https://github.com/elyelysiox/recaptcha
1•Pelada•9m ago•0 comments

Where can I find or get in contact with farmers specifically in the US?

1•strapchay•9m ago•0 comments

We Heart It is back

https://weheartit.net/
1•djxjxjcjcjc•9m ago•0 comments

Dory: Docker and Linux containers, native to your Mac

https://augani.github.io/dory/
1•xyzzy_plugh•23m ago•0 comments

Reconstructing SQLite's float-to-text without reading the source

https://github.com/lucasolopes/haruspex
1•byolopes•23m ago•0 comments

EPA approves pesticides that may be considered forever chemicals

https://thehill.com/policy/energy-environment/5950487-epa-pesticides-forever-chemicals-pfas/
1•OutOfHere•31m ago•0 comments

Show HN: Void test: 6 frontier LLMs go silent on "Be silence." Live proof

https://getswiftapi.com/void-test
1•rayanpal_•36m ago•0 comments

Show HN: SmolSignal – signal copilot for Flipper Zero files

https://github.com/SmolNero/SmolSignal
2•edgar_ortega•39m ago•1 comments

Show HN: I replaced my $500/mo legal SaaS with an AI-generated toolkit

https://maxiporonga.gumroad.com/l/ytruk
1•promptalex53•40m ago•0 comments

Show HN: Earshot, a homebrew Claude Tag

https://github.com/Octember/earshot
1•octember•43m ago•1 comments

Maybe you should learn something

https://www.marginalia.nu/log/a_135_learn/
2•tylerdane•44m ago•1 comments

FemiCore Review 2026 – 7-Second Bladder Reset Method Explained

https://gamma.app/embed/FemiCore-Review-2026-7-Second-Bladder-Reset-Method-Explained-9yahcz6mepth...
1•wildriverreview•44m ago•0 comments

Show HN: Local privacy-first Microsoft Recall alternative with Gemma 4

https://github.com/ayushh0110/ScreenMind/blob/main/README.md
1•skye0110•49m ago•0 comments

MagicBookShelf – A modern reader for classic novels – Crime and Punishment

https://magicbookshelf.org/read/crime-and-punishment/
1•philipfweiss•59m ago•0 comments

Four-Byte Burger [video]

https://www.youtube.com/watch?v=i4EFkspO5p4
1•CharlesW•1h ago•0 comments

A Conflict-Free Multi-Agent Ensemble for Claude and Codex

https://medium.com/@Koukyosyumei/a-conflict-free-multi-agent-ensemble-for-claude-and-codex-0ded61...
1•syumei•1h ago•0 comments

Show HN: Snibble – Snake x Scrabble where every match fits in a QR code

https://snibble.gg/
1•purple-leafy•1h ago•0 comments

Cholibrium Reviews 2026 – Does This Mushroom Blend Work

https://gamma.app/embed/Cholibrium-Reviews-2026-Does-This-Mushroom-Blend-Work-7rsn8kmry09nfdi?mod...
1•wildriverreview•1h ago•0 comments

BrickSlider – TypeScript-first, Tailwind-first carousel

https://sixsrc.github.io/brickslider/
1•marcusloren•1h ago•1 comments

A 2048-spin bulk acoustic wave Ising machine for number partitioning and Sudoku

https://arxiv.org/abs/2607.02112
2•Jimmc414•1h ago•0 comments

How Can Reinforcement Learning Achieve Expert-Level [Chip] Placement?

https://arxiv.org/abs/2604.25191
2•Jimmc414•1h ago•0 comments

Synthesis is harder than analysis

https://surfingcomplexity.blog/2026/07/03/synthesis-is-harder-than-analysis/
10•azhenley•1h ago•4 comments

I watched a flat earth convention

https://theconversation.com/i-watched-an-entire-flat-earth-convention-for-my-research-heres-what-...
1•robertclaus•1h ago•0 comments

The Human in the Loop Essay

https://designedbybruno.net/essays/06-the-human-in-the-loop
1•designedbybruno•1h ago•0 comments

Show HN: A tree-based replacement for PowerPoint

https://presentation.ironactionai.com/
1•nkersting•1h ago•0 comments

US life expectancy on track to reach record high

https://www.cnn.com/2026/07/02/health/us-death-rate-record-low-cdc-report-longevity
2•mbroshi•1h ago•0 comments

Windows App Profiles

https://github.com/lahcim/WindowsAutoProfiles
2•lahcim2000•1h ago•1 comments