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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!

How to be an AI safety research engineer

https://www.lesswrong.com/posts/Wty5mcDBEmypap8o2/how-to-be-an-ai-safety-research-engineer
1•joozio•1m ago•0 comments

Is Europe safer than America?

https://www.economist.com/graphic-detail/2026/08/09/is-europe-safer-than-america
1•vinni2•5m ago•1 comments

Kimi K3 Sandbox Escape Exposes Weak Links in Agent Testing

https://ai-updates.net/kimi-k3-sandbox-escape-agent-testing/
1•ashurandi•9m ago•1 comments

MIT researchers tackle the economic realities of fusion power

https://news.mit.edu/2026/mit-researchers-tackle-economic-realities-fusion-power-0810
2•mdp2021•11m ago•0 comments

Israeli settlers are sneaking into Syria to claim land for a Jewish outpost

https://apnews.com/article/israel-syria-netanyahu-jewish-settlers-bashan-461c4c4f686d5cf74f0617a7...
4•hebelehubele•11m ago•1 comments

The Renaissance Was Edited Before Anyone Asked for It Back

https://thetraces.substack.com/p/the-renaissance-was-edited-before
1•feldrim•12m ago•0 comments

Passkey Town

https://fenko.nz/passkey-town/
1•mosajjal•15m ago•1 comments

Scaling Logical Reasoning on Modern HPC Hardware

https://surface.syr.edu/etd/2351/
1•matt_d•15m ago•0 comments

AI assistant hacks gym website in first known Australian autonomous cyber attack

https://www.rnz.co.nz/news/world/952663/ai-assistant-hacks-gym-website-in-first-known-australian-...
3•billybuckwheat•16m ago•0 comments

OpenHaystack: Reverse-engineered Apple's Find My network

https://github.com/seemoo-lab/openhaystack
1•BrandiATMuhkuh•17m ago•0 comments

Dark mode toggles: two states are enough

https://lea.verou.me/blog/2026/dark-mode-toggles/
3•JeremyTheo•24m ago•1 comments

Why does Apple have an office in a small town close to Hamburg?

https://alsterrunde.com/why-does-apple-have-an-office-in-a-small-town-close-to-hamburg/
2•mertbio•26m ago•0 comments

Show HN: NexusMem – Local context memory engine for AI coding agents

https://github.com/yaminbakoh4-dot/NexusMem
2•yamin_bakoh•28m ago•0 comments

AI companies destroy physical books – let's scan rare books before it's too late

https://annas-archive.gl/blog/physical-destruction.html
5•rzk•29m ago•0 comments

Show HN: Lector, a FOSS self-hosted language reader (with a cloud option)

https://lector.dev/
2•3stacks•30m ago•0 comments

AI Is Rewiring South Korea's Careers, Dating and Culture

https://www.bloomberg.com/news/features/2026-08-06/ai-sk-hynix-samsung-rewire-south-korea-s-caree...
2•theanonymousone•33m ago•0 comments

Endlessdoors Is Phoning Home. Pick Up

https://www.vulncheck.com/blog/zbt-endlessdoors
2•D4Ha•37m ago•0 comments

Numberblocks: It All Began

https://www.blocksuniverse.tv/blocksnews/numberblocks-how-it-all-began
2•kamphey•38m ago•0 comments

Exhibit 8A and 8B from "The Good Old USA" Project (2024)

https://www.justice.gov/opa/media/1366201/dl
3•sans_souse•38m ago•0 comments

Naïve raises $28.5M to automate setting up and running a company

https://techcrunch.com/2026/08/06/naive-raises-28-5m-to-automate-the-grunt-work-of-setting-up-and...
3•ashurandi•49m ago•3 comments

Beyond Origin Validation: Four Classes of Routing Attack Nobody Is Validating

https://labs.ripe.net/author/antonio-prado/beyond-origin-validation-four-classes-of-routing-attac...
2•m_montazeri•54m ago•0 comments

Docker Sandboxes – Disposable, isolated sandboxes for AI agents

https://www.docker.com/products/docker-sandboxes/
58•etoxin•1h ago•28 comments

Decart Exploring Sale, Possibly SpaceX

https://www.calcalistech.com/ctechnews/article/hjhzrluuml
1•Taikhoom2010•1h ago•0 comments

Zooza

https://www.zooza.online/
1•majklesko•1h ago•0 comments

What is WAL backpressure, and why does ClickHouse Managed Postgres need it?

https://clickhouse.com/blog/wal-backpressure-clickhouse-managed-postgres
2•saisrirampur•1h ago•0 comments

Escaping the LLM Coding Rat Race

https://aaronstannard.com/escaping-ai-coding-ratrace/
1•kiyanwang•1h ago•1 comments

Production support agents that read your code and your database, via MCP

https://medium.com/@rahulgolwalkar/the-support-agent-that-actually-reads-your-code-and-your-produ...
1•rahulgolwalkar•1h ago•0 comments

Show HN: Teaching agents how to play Factorio (using RLM, GEPA)

https://github.com/ukituki/dspy-factorio/
1•ukituki•1h ago•0 comments

We are still early (quiz for the graph we all know)

https://early.stevenmoody.com/
1•tillcarlos•1h ago•1 comments

Seas have hit hottest temperature on record for July

https://www.theguardian.com/environment/2026/aug/10/global-seas-hottest-temperature-july-scientists
3•johnshades•1h ago•0 comments