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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!

Reddit Stock Collapses 23% as AI Eats Away at User Growth

https://www.barchart.com/story/news/3584357/reddit-stock-collapses-23-as-ai-eats-away-at-user-growth
2•u1hcw9nx•5m ago•1 comments

Investigation into the Re-Appearance of Agent 9

https://medium.com/luminasticity/investigation-into-the-re-appearance-of-agent-9-a9a9a3a17393
1•bryanrasmussen•6m ago•0 comments

IBM CEO says quantum computing will have impact on earnings by 2028 or 2029

https://www.cnbc.com/2026/07/30/ibm-ceo-quantum-computing-measurable-impact-earnings-2028-2029.html
2•mrkO99•9m ago•0 comments

Continuous Architecture Evolution with Team Habits

https://www.youtube.com/watch?v=xO0__3gRWoI
1•aoma_conference•9m ago•0 comments

Some of us will never have careers [video]

https://www.youtube.com/watch?v=lFxvf4qcJL4
1•Gecko4072•11m ago•0 comments

Show HN: utils.foo > developer utilities that run client-side without ads

https://utils.foo/
1•zodvik•11m ago•0 comments

The midlife crisis castle (Kendra Gaylord) [video]

https://www.youtube.com/watch?v=hiQ3mZA_byY
1•zeristor•12m ago•0 comments

Ten Advances in Mathematics and Theoretical Computer Science [pdf]

https://cdn.openai.com/pdf/ten-proofs-oai.pdf
2•ahlCVA•13m ago•0 comments

Norway's first adventure games (2025)

https://spillhistorie.no/2025/09/11/norways-first-adventure-games-part-1/
2•kqr•16m ago•0 comments

Sunsetting New.email

https://resend.com/blog/sunsetting-new-email
2•vednig•18m ago•0 comments

Stacked Diffs (and why you should know about them) (2023)

https://newsletter.pragmaticengineer.com/p/stacked-diffs
2•theanonymousone•23m ago•0 comments

Simon Willison on DeepSeek-V4-Flash-0731

https://simonwillison.net/2026/Jul/31/deepseek-v4-flash-0731/
9•theanonymousone•28m ago•3 comments

The Kurzgesagt Situation is Insane [video]

https://www.youtube.com/watch?v=OX1yHmeLPy8
4•wrxd•29m ago•0 comments

RamenHaus

https://ramen.haus/
21•oler•29m ago•3 comments

Unifeyn – upload any content and get notes, flashcards, and quizzes from it

https://www.unifeyn.app/
2•securemepro•34m ago•0 comments

1 in 10 comments across 40 subreddits disappeared within 36 hours

https://growtika.com/blog/reddit-comment-removal-study
2•Growtika•37m ago•0 comments

Show HN: SendPage – Paste AI-generated HTML, get a link clients can open

https://sendpageapp.com
3•jack714•38m ago•1 comments

The Obligatory AI Post

https://lapcatsoftware.com/articles/2026/7/15.html
3•latexr•41m ago•0 comments

"Last month, you watched TV for less than an hour per day on average"

https://twitter.com/oohweehuman/status/2083162929369878606
2•turrini•44m ago•1 comments

Multi-Paxos vs. Strong-Sync vs. Raft

https://medium.com/from-zero-to-seekdb/multi-paxos-vs-strong-sync-primary-replica-vs-raft-which-h...
2•jinqueeny•48m ago•0 comments

EU will mandate labels on authentic-looking AI content starting August 2

https://www.engadget.com/2227966/eu-mandate-labels-on-authentic-looking-ai-content/
3•vrganj•51m ago•0 comments

Free tools for Etsy sellers, podcasters, and indie devs

https://thesellermind.com/tools/fee-calculator
2•haimo•52m ago•0 comments

FBI gets voter's IP address in new fraud probe tactic

https://www.axios.com/2026/07/31/fbi-voter-ip-address-investigation
5•_tk_•56m ago•1 comments

How to Do Great Work

https://paulgraham.com/greatwork.html
2•tosh•58m ago•0 comments

The Chatbot Act Forces One Parenting Model on Every Family

https://www.eff.org/deeplinks/2026/07/chatbot-act-forces-one-parenting-model-every-family
3•mdp2021•1h ago•0 comments

Leopold Aschenbrenner Built a Hot A.I. Hedge Fund. Then It Melted Down

https://www.nytimes.com/2026/07/31/business/situational-awareness-leopold-aschenbrenner.html
5•sbulaev•1h ago•2 comments

Google Just Ruined One of Its Most Important Tools

https://www.theatlantic.com/technology/2026/07/google-earth-ai-images/688145/
4•eloisius•1h ago•2 comments

Perplexity AI loses bid to toss Reddit lawsuit over data scraping

https://www.reuters.com/legal/litigation/perplexity-ai-loses-bid-toss-reddit-lawsuit-over-data-sc...
2•thm•1h ago•0 comments

What makes good magnet programs attractive?

https://www.educationprogress.org/p/what-makes-good-magnet-programs-attractive
2•barry-cotter•1h ago•0 comments

Ask HN: How did your boss's behavior change with the rise of AI?

3•aredirect•1h ago•1 comments