[FIXED] What's the difference between these functions

Issue

What's the difference between these functions

1. create_task and call_soon
2. call_soon_threadsafe and run_coroutine_threadsafe

create_task vs call_soon

these two functions schedule the execution of a Coroutines, not thread-safe.
create_task returns a Task object, and call_soon returns Handle object, but is there any difference other than this, especially in usage?

call_soon_threadsafe vs run_coroutine_threadsafe

these two functions are meant to be called from a different OS thread than the one where the event loop is running. And in most cases, I can use any of them.

Solution

create_task vs call_soon - these two functions schedule the execution of a Coroutines

No, only create_task schedules the execution of a coroutine (async function). call_soon schedules the one-shot execution of an ordinary function.

So, if you have a coroutine x defined with async def that you want executed "in the background", you call asyncio.create_task(x()). If you have a function f defined with def that you want executed as soon as the event loop is next idle, you call loop.call_soon(f).

The same difference in usage applies to run_coroutine_threadsafe and call_soon_threadsafe, which allow submitting work to a running event loop from a different thread.

Answered By - user4815162342