[tomwojcik]

FastAPI docs, case when you don't create an async route

> 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).

https://fastapi.tiangolo.com/async/#path-operation-functions

OP either meant this, or its variation, such as async_to_sync and sync_to_async. https://github.com/django/asgiref/blob/main/asgiref/sync.py

Ofc this is a python example. I have no idea how it works in different languages.

[mplanchard]

“run in a threadpool” isn’t the same as creating a thread though

[maxbond]

NB: In Python >= 3.9 the idiomatic way to do this is to_thread(), not familiar with these ASGI functions but I would guess they're a polyfill and/or predate 3.9.

https://docs.python.org/3/library/asyncio-task.html#asyncio....

[pdhborges]

They are not polyfills. Multiple scheduling modes are provided for libraries that are not thread safe (it's a total mess and I avoid these wrappers like the plague)

[maxbond]

I've had to weld some async and sync Python together with queues and callbacks, it's not pretty.