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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•7mo 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!

Philips agrees to acquire SpectraWAVE Inc

https://www.philips.com/a-w/about/news/archive/standard/news/press/2025/philips-agrees-to-acquire...
1•methuselah_in•2m ago•0 comments

Sol – Audio Livestreaming Hardware

https://evenings.fm/sol
1•NickySlicks•2m ago•0 comments

Oceanic Pole of Inaccessibility

https://en.wikipedia.org/wiki/Pole_of_inaccessibility
1•lippihom•4m ago•1 comments

Think Different: Asahi Linux on an M2 MacBook Pro

https://www.feoh.org/posts/think-different-asahi-linux-on-an-m2-macbook-pro.html
1•abnercoimbre•5m ago•0 comments

OWASP PTK 9.2.4: CVE Lookup module and CVE-focused DAST attacks

1•DenisPodgurskii•5m ago•0 comments

The high-end desktop supercomputers for AI and HPC

https://gptshop.ai/
1•doener•5m ago•0 comments

Mister Mxyzptlk

https://en.wikipedia.org/wiki/Mister_Mxyzptlk
1•rolph•5m ago•0 comments

Antigravity prompt injection: Read browser local storage remotely

https://introvertmac.wordpress.com/2025/12/15/ai-ide-prompt-injection-reading-browser-local-storage/
2•introvertmac•7m ago•0 comments

Detailed balance in large language model-driven agents

https://arxiv.org/abs/2512.10047
1•gmays•8m ago•0 comments

Multiple Threat Actors Exploit React2Shell (CVE-2025-55182)

https://cloud.google.com/blog/topics/threat-intelligence/threat-actors-exploit-react2shell-cve-20...
1•gnabgib•8m ago•0 comments

Dictionary of Canadianisms on Historical Principles 3rd Edition

https://dchp.arts.ubc.ca/
1•cf100clunk•9m ago•1 comments

The appropriate amount of effort is zero

https://expandingawareness.org/blog/the-appropriate-amount-of-effort-is-zero/
2•gmays•10m ago•0 comments

Be a Problem-Solver Not a Politician

https://mo42.bearblog.dev/be-a-problem-solver-not-a-politician/
1•speckx•10m ago•0 comments

How iMessage sends and receives messages securely

https://support.apple.com/guide/security/how-imessage-sends-and-receives-messages-sec70e68c949/web
1•CharlesW•10m ago•0 comments

Show HN: Built a tool to allow chatting with SEC filings

https://github.com/ralliesai/tenk
1•rallies•10m ago•0 comments

Show HN: Enabling Agentic Commerce Protocol (ACP) for Shopify Stores

https://www.actory.ai/
1•afrederico•12m ago•1 comments

Fortescue Infinity Train 14.5 MWh battery that never needs charging [update]

https://electrek.co/2025/12/15/fortescue-infinity-train-electric-locomotive-never-needs-fuel-or-c...
2•Bender•12m ago•0 comments

China, Iran are having a field day with React2Shell, Google warns

https://www.theregister.com/2025/12/15/react2shell_flaw_china_iran/
1•Bender•12m ago•0 comments

What's behind the battle between The Mission District and SF tech companies

https://www.sfchronicle.com/bayarea/article/doordash-delivery-drone-21239843.php
1•mikhael•13m ago•0 comments

Ask HN: Bloggers, how do you manage your content?

1•freemanjiang•14m ago•1 comments

Show HN: Build ML training datasets from large-scale satellite/aerial imagery

https://github.com/noahgolmant/label-tiles
1•noahgolmant•15m ago•0 comments

A visual editor for the Cursor Browser

https://cursor.com/blog/browser-visual-editor
1•evo_9•15m ago•0 comments

Improving Emacs Screenshots

https://mbork.pl/2025-12-15_Improving_Emacs_screenshots
1•speckx•17m ago•0 comments

Surveyi – RTXI Real Time Experience Intelligence

https://surveyi.app/
1•dickiedogbrands•17m ago•1 comments

Show HN: I made an LLM-powered CRO tool

https://crovise.netlify.app/
1•adamoufkir•18m ago•1 comments

Google discontinuing their dark web report

https://support.google.com/websearch/answer/16767242?hl=en&co=GENIE.Platform%3DAndroid
12•ortusdux•20m ago•1 comments

What changes when agent routing is fully deterministic?

1•balachandarmani•21m ago•0 comments

Origins of the TPC and the first 10 years

https://www.tpc.org/information/about/history5.asp
1•b-man•21m ago•0 comments

context—Odin’s Most Misunderstood Feature

https://www.gingerbill.org/article/2025/12/15/odins-most-misunderstood-feature-context/
1•davikr•23m ago•0 comments

Ukraine hits Russian submarine with underwater drones

https://www.euronews.com/2025/12/15/ukraine-hit-russian-submarine-with-underwater-drones-for-the-...
5•vinnyglennon•24m ago•0 comments