python-trio/trio

Health v2 · maintenance only

Flags: no_license

Adoption not part of the score

7338 stars · 436 forks observed · 2026-09-26

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-29, confidence not recorded

Trio is a Python library for async/await-native concurrency and I/O, built around structured concurrency principles. It aims for production quality with an obsessive focus on usability and correctness, offering a simpler alternative to asyncio and Twisted.

Use cases

• run many network requests concurrently in Python
• write an async web server or websocket handler
• fetch lots of web pages in parallel with a spider
• supervise multiple subprocesses asynchronously
• replace asyncio with a simpler, safer concurrency model
• manage timeouts and cancellation reliably in async code

When to choose

• you want structured concurrency and sane cancellation semantics
• you're starting a new async Python project and aren't locked into asyncio
• you value correctness and usability in concurrent I/O code
• you need a mature, well-documented async I/O library

When to avoid

• your project or dependencies already depend on asyncio's ecosystem
• you need CPU-bound parallelism rather than concurrent I/O
• you require drop-in asyncio API compatibility

Facets

library · maturity stable

concurrency http-server websocket networking file-system developer-tools networking backend python cross-platform async-await structured-concurrency io asyncio-alternative automation

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