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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!

Swift Package Index Joins Apple

https://swiftpackageindex.com/blog/swift-package-index-joins-apple
1•JDevlieghere•26s ago•0 comments

1•nicolotognoni•27s ago

PhoneBuddy: Training Open Models for Agentic Phone Use

https://phonebuddyai.github.io/
1•ilreb•29s ago•0 comments

Agents Declaration – Designing an Agents Orchestration Library – Part II

https://ffacu.dev/blog/arm-agent-fleet
1•ffacu•1m ago•0 comments

SharePoint Copilot Apps

https://devblogs.microsoft.com/microsoft365dev/going-beyond-text-in-microsoft-365-copilot-introdu...
1•saikatsg•2m ago•0 comments

Double stacked Indian freight trains

https://old.reddit.com/r/trains/comments/1udldj0/double_stacked_indian_freight_trains/
1•taubek•4m ago•0 comments

99% compressed, 1% on the bill: I audited 1B tokens to find out why

https://nuxs.ai/study
1•josuramos•4m ago•0 comments

Show HN: Grove – fast source insights for coding agents – via Tree-sitter

https://github.com/Entelligentsia/grove
1•bonigv•6m ago•0 comments

Oracle sheds 21,000 roles over the past year

https://www.cnbc.com/2026/06/23/oracle-ai-job-cuts-layoffs-21000.html
2•leopoldj•10m ago•0 comments

FUTO Swipe – A new swipe typing model

https://swipe.futo.tech/
3•futohq•11m ago•0 comments

Don't Trust OpenAI, "This Is Your Final Warning"

https://247wallst.com/investing/2026/06/21/dont-trust-openai-this-is-your-final-warning/
1•T-A•12m ago•0 comments

Hubble: Notepad for Agents

https://www.hubble.md/
1•handfuloflight•14m ago•0 comments

The truth about being a manager

https://sofiakodar.github.io/posts/becomingmanager/
5•adunk•15m ago•0 comments

NYC Wants to End Surveillance Pricing

https://prospect.org/2026/06/23/new-york-city-wants-to-end-surveillance-pricing/
4•h2si•15m ago•0 comments

My Steam Machine Is a 50ft HDMI Cable

https://blog.matthewbrunelle.com/my-steam-machine-is-a-50ft-hdmi-cable/
3•speckx•16m ago•0 comments

Skynet Progress Report

https://blog.dshr.org/2026/03/skynet-progress-report.html
1•jumpkick•17m ago•0 comments

A Man Has Been Drawing a Map of an Imaginary Land Since 1963

https://www.openculture.com/2026/06/this-man-has-been-drawing-a-map-of-an-imaginary-land-since-19...
2•Brajeshwar•18m ago•0 comments

Apache Grails 7.0.12 and 7.1.12

https://github.com/apache/grails-core
1•theanonymousone•18m ago•0 comments

JBang: Unleash the Power of Java

https://github.com/jbangdev/jbang
2•theanonymousone•21m ago•0 comments

New chip could help tiny robots traverse complex environments

https://news.mit.edu/2026/new-chip-could-help-tiny-robots-traverse-complex-environments-0623
2•droidjj•21m ago•0 comments

Ancient Tablets Show Markets Worked 4k Years Before Economists Explained Them

https://thedailyeconomy.org/article/ancient-clay-tablets-show-markets-worked-4000-years-before-ec...
2•NaOH•21m ago•0 comments

Over 1700 Cargill Meatpacking Workers Locked Out After Demanding Bathroom Breaks

https://sentientmedia.org/cargill-meatpacking-workers-locked-out/
2•randycupertino•21m ago•0 comments

Anthropic rolls out Claude Tag, your new agentic AI coworker in Slack

https://www.zdnet.com/article/anthropic-claude-tag-agentic-ai-coworker-slack/
1•thm•21m ago•0 comments

AI-Generated UI Is Inaccessible by Default

https://master.dev/blog/ai-generated-ui-is-inaccessible-by-default/
1•speckx•22m ago•0 comments

Thirsty and power hungry: Australia's datacenter boom

https://www.theguardian.com/technology/2026/jun/22/australia-ai-datacentre-boom-environmental-imp...
2•logickkk1•23m ago•0 comments

Looking Ahead to Postgres 19

https://www.snowflake.com/en/blog/engineering/postgresql-19-features-beta/
2•craigkerstiens•24m ago•0 comments

Charon: A blind, end-to-end-encrypted marketplace for LLM inference

https://github.com/DeepBlueDynamics/charon
1•kordlessagain•25m ago•1 comments

GVoice suspended in error: no Takeout, portout, incoming text forwarding blocked

https://www.google.com/appsstatus/dashboard/incidents/qqWhZSpoVLJWur1GfHfu
1•ProblemExplorer•25m ago•1 comments

Transaction Processing in the Data Plane

https://github.com/frankmcsherry/blog/blob/master/posts/2025-04-27.md
1•nate_stewart•29m ago•0 comments

75% More Pedestrians Have Been Killed Since 2009. Giant Trucks and SUVs Are Why

https://www.thedrive.com/news/75-more-pedestrians-have-been-killed-since-2009-giant-trucks-and-su...
71•theanonymousone•29m ago•36 comments