Trio Python library
Hacker ApprovedRanked 4 of 11 concurrency libraries by recommenders
Python async library whose structured concurrency makes code simpler and more predictable than asyncio, with a thoughtful design and an excellent tutorial.
Python async library whose structured concurrency makes code simpler and more predictable than asyncio, with a thoughtful design and an excellent tutorial.
10 people gave an opinion
- recommend it
- 10
- criticize it
- 0
- approval share
- 100%
Recommended in 8 of 13 months
- November 2025: recommended
- December 2025: not recommended
- January 2026: not recommended
- February 2026: recommended
- March 2026: recommended
- April 2026: recommended
- May 2026: recommended
- June 2026: not recommended
- July 2026: recommended
- August 2026: recommended
- September 2026: recommended
- October 2026: not recommended
- November 2026: not recommended (month in progress)
Why it carries the badge
- 10 people recommend itNeeds 10 or more, met.
- Nobody criticizes itNeeds 2 to 1 or better, met.
- Recommended in 8 of 13 monthsNeeds 4 or more, met.
The same three rules apply to every product, and the badge can’t be bought. How the badge works
What people say about it
The reasons people give, with the number of comments that give each one. Open a reason to read what they said.
Why people recommend it
Each mark is one comment
Better alternative to asyncio
“Things like Trio can definitely help shave off some of the rough edges of Python's async”
Comment from 2 Aug 2026 in “Some more things about Django I've been enjoying” “With Trio it has a better async capabilities too.”
Comment from 12 May 2026 in “If AI Writes Your Code, Why Use Python?” “an excellent Python alternative to asyncio”
Comment from 25 Apr 2026 in “What Async Promised and What It Delivered” - Comment from 26 Mar 2026 in “Looking at Unity made me understand the point of C++ coroutines”
Simpler, predictable concurrent code
“Trio behaves differently (in well-defined, easy to understand ways) depending on where you put nurseries.”
Comment from 12 Sep 2026 in “A Design Space Exploration of Async/Await” “Structured approaches can prevent a huge amount of those issues”
Comment from 20 Feb 2026 in “Using go fix to modernize Go code” “genuinely does help write much simpler concurrent code”
Comment from 25 Mar 2026 in “Looking at Unity made me understand the point of C++ coroutines” Thoughtful design, explicit behavior
“Trio has no global "spawn" method, by design.”
Comment from 12 Sep 2026 in “A Design Space Exploration of Async/Await” “so thoughtfully designed at every turn”
Comment from 12 Sep 2026 in “A Design Space Exploration of Async/Await”
Other concurrency libraries people recommend
The four most recommended other concurrency libraries, with the same counts for each, so you can compare like for like. The tick on each bar marks the 2 to 1 line the badge needs.
| Product | Recommend | Criticize | Approval | Months | Owned | Badge |
|---|---|---|---|---|---|---|
| Tokio | 57 | 45 | 56% | 12 | — | — |
| Akka | 12 | 9 | 57% | 7 | — | — |
| ZIO | 11 | 2 | 85% | 9 | — | Approved |
| Trio Python libraryThis page | 10 | 0 | 100% | 8 | — | Approved |
| core.async | 9 | 4 | 69% | 6 | — | — |
What people said
All 13 comments that mention it, newest first. Each links to the original comment.
“this was the first time I heard about Trio”
“Trio behaves differently (in well-defined, easy to understand ways) depending on where you put nurseries.”
“Trio has no global "spawn" method, by design.”
“so thoughtfully designed at every turn”
“Things like Trio can definitely help shave off some of the rough edges of Python's async”
“It works for simple situations.”
“With Trio it has a better async capabilities too.”
“an excellent Python alternative to asyncio”
“explicitly randomize startup order so that you won't accidentally write code that relies on it”
“it's still not as nice as using Trio”
“genuinely does help write much simpler concurrent code”
“Structured approaches can prevent a huge amount of those issues”
“the trio library has an excellent tutorial that explains all of these concepts”
Counts come from 1,795,640 Hacker News comments, November 2025 to November 2026. How we count. Report a mistake.