Question about asyncio doc example

[Saimadhav Heblikar]

Hi,

The example in question is
https://docs.python.org/3/library/asyncio-task.html#example-hello-world-coroutine.
I'd like to learn the purpose of the statement
"yield from asyncio.sleep(2)" in that example.

In particular, I'd like to know if asyncio.sleep() is used as a
substitute for slow/time consuming operation, i.e. in real code,
whether there will be a real time consuming statement in place of
asyncio.sleep().

-- 
Regards
Saimadhav Heblikar