fastapi/asyncer

Health v2 · maintenance only

Adoption not part of the score

2485 stars · 89 forks observed · 2026-08-28

What it is AI-extracted, prompt v1, taxonomy v1, 2026-08-30, confidence not recorded

Asyncer is a small Python library built on AnyIO that provides a handful of utility functions for working with async/await and concurrent code with a focus on developer experience. It improves editor autocompletion, inline errors, and mypy type-checking support, and simplifies mixing async code with blocking code.

Use cases

• run async tasks concurrently in python with better type checking
• mix blocking and async code in python
• get autocompletion and inline errors for asyncio code
• run functions in a worker thread from async code
• simplify asyncio and trio compatibility in my project

When to choose

• you want a tiny, opinionated wrapper over AnyIO with excellent editor and mypy support
• you need to combine sync blocking calls with async code conveniently
• you already like the FastAPI ecosystem's developer-experience philosophy

When to avoid

• you need a full-featured async framework or advanced concurrency primitives
• you can't pin versions, since the API may still change
• you want to avoid extra dependencies for just four functions

Facets

library · maturity active

concurrency developer-tools developer-tools programming-languages python cross-platform asyncio anyio trio async-await developer-experience type-checking

Member repositories

For agents

markdown · JSON · MCP: product_card(name="fastapi/asyncer")