FastAPI/Docs/Tutorial/Async

• Concurrency and async / await - FastAPI

  • async and await

    • I created another library on top of AnyIO, as a thin layer on top, to improve a bit the type annotations and get better autocompletion, inline errors, etc. It also has a friendly introduction and tutorial to help you understand and write your own async code:  Asyncer Asyncer. It would be particularly useful if you need to combine async code with regular (blocking/synchronous) code.
      

  • FastAPI/Docs/Tutorial/Async/Very Technical Details here

    • When you declare a path operation function with normal def instead of async def, it is run in an external threadpool that is then awaited, instead of being called directly (as it would block the server).