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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!

Misogynistic views are biggest red flag for violent extremism, report finds

https://www.abc.net.au/news/2026-08-25/rising-misogyny-in-young-people/107053640
1•rendx•2m ago•0 comments

Show HN: Trace where a link goes before opening it

https://securl.online/check-link
1•ktbatterham•4m ago•0 comments

Your AI Generated Menu Triggered My Trypophobia

https://shubhamjain.co/2026/08/27/ai-food-photos-trypophobia/
2•shubhamjain•6m ago•0 comments

What a century of data tells us about today's corporate bond spreads

https://www.ft.com/content/0a50dff4-27f4-46f1-9bdd-9dc047842b2e
2•latentframe•8m ago•0 comments

Amsterdam| Full Time, hybrid – HFT C++ Engineer – Low-latency systems

https://www.42.com/careers/hft-core-engineer
2•mardariya•8m ago•0 comments

How a Ukrainian commander sped through the 'kill zone' to save wounded troops

https://www.reuters.com/world/how-ukrainian-commander-sped-through-kill-zone-save-wounded-troops-...
2•petethomas•8m ago•0 comments

What is the Sapir-Whorf hypothesis? (1984) [pdf]

https://linguistics.berkeley.edu/kay/Kay&Kempton.1984.pdf
2•the-mitr•11m ago•0 comments

Vue Streaming Tutorial: Build a Live Video Streaming App with WebRTC (WHEP)

https://www.red5.net/blog/how-to-create-webrtc-publisher-clients-with-adaptive-live-encoding/
3•mondainx•12m ago•0 comments

The UK Power Grid Has a Phantom Data Center Problem

https://www.wired.com/story/uk-data-centers-logjam-ofgem-regulations/
3•kuuuzya•14m ago•0 comments

The Seniors Against Senior Housing

https://www.bloomberg.com/news/features/2026-08-19/senior-housing-faces-opposition-from-seniors-t...
2•littlexsparkee•18m ago•0 comments

Claudeforce

https://twitter.com/salesforce/status/2092741578045497762
2•tosh•18m ago•0 comments

Show HN: Flint

https://flint.thingg.co
3•aosmith•21m ago•0 comments

AWS billing bug causes 1000x increase in token prices

https://repost.aws/questions/QUveO4Hv5ITKmWvfoCNizR4A/from-1k-to-400k-monthly-usage-billing-with-...
3•nawitus•21m ago•1 comments

Launching Aroha Astrology – would love feedback from fellow founders

https://play.google.com/store/apps/details?id=com.aroha.astrology&hl=en_US
2•subir17•21m ago•0 comments

Whoop just made its most stylish band yet

https://mashable.com/tech/whoop-meridian-band-announcement-price
2•kuuuzya•21m ago•0 comments

Lounge Discussion

https://dis.tinychan.net/lounge/
2•allgirl•24m ago•1 comments

C can be memory-safe

https://blog.erratasec.com/2023/02/c-can-be-memory-safe.html
1•signa11•24m ago•0 comments

Why Israeli Authorities Are Encouraging Settler Violence Against Palestinians

https://www.newyorker.com/news/q-and-a/why-israeli-authorities-are-encouraging-settler-violence-a...
1•hebelehubele•25m ago•1 comments

Metaⁿ: Recursive Self-Improvement Through Emergent Depth

https://arxiv.org/abs/2608.24735
1•sbulaev•25m ago•0 comments

The U.K. Is Falling for Palantir's Salesmanship

https://foreignpolicy.com/2026/08/26/palantir-operator-starmer-united-kingdom-nhs-software/
2•CaptainZapp•25m ago•0 comments

Flat vs. segmented memory – it's recursive

https://www.humprog.org/~stephen/blog/2026/08/25/#flat-vs-segmented
1•signa11•30m ago•0 comments

Meta $16.68B settlement with 29 states

https://oag.dc.gov/release/attorney-general-schwalb-announces-meta-will-pay
2•Sentralis•32m ago•1 comments

Claudeforce

https://www.salesforce.com/claudeforce/?bc=HL
1•makeramen•35m ago•0 comments

Baltimore neighborhoods rely on private security to fill policing gaps

https://www.baltimoresun.com/2024/09/20/baltimore-neighborhoods-rely-on-private-security-to-fill-...
1•allgirl•35m ago•1 comments

Show HN: Text editor that does it all

https://kraa.io/about?s=hn
1•levmiseri•40m ago•1 comments

C++26: Std:Inplace_vector

https://www.sandordargo.com/blog/2026/08/26/cpp26-inplace-vector
1•signa11•44m ago•1 comments

SpaceX plans a $100B spaceport built for launches a year

https://thenextweb.com/news/spacex-louisiana-spaceport-100bn-europe-launch-cadence
1•ksec•46m ago•1 comments

Composition and Modular Verification of TLA+ Specs

http://muratbuffalo.blogspot.com/2026/08/composition-and-modular-verification-of.html
2•matt_d•47m ago•0 comments

Ask HN: How do you protect self-hosted websites from LLM scrapers?

1•atmosx•49m ago•1 comments

OpenAI staff observed warning signs before AI agents attack on Hugging Face

https://www.theguardian.com/technology/2026/aug/26/openai-staff-observed-warning-signs-before-ai-...
4•nreece•49m ago•1 comments