What is the difference in designs?

Question

Python

import asyncio
import time

async def say_after(delay, what):
    await asyncio.sleep(delay)
    print(what)

async def main():
    print(f"started at {time.strftime('%X')}")

    await say_after(1, 'hello')
    await say_after(2, 'world')

    print(f"finished at {time.strftime('%X')}")

asyncio.run(main())

-------------------------------------------------- -

import time

def say_after(delay, what):
    time.sleep(delay)
    print(what)

def main():
    print(f"started at {time.strftime('%X')}")

    say_after(1, 'hello')
    say_after(2, 'world')

    print(f"finished at {time.strftime('%X')}")

main()

I took the code above from the official python documentation, I can’t understand the meaning of this construction, because, for example, in the same C Sharp in an async method, it was possible to launch a method through await, which did not block the rest when.

Answer 1

I don’t know what you have in Sea Sharp, but here is an excerpt from the official Sea Sharp documentation :

The await operator suspends evaluation of the enclosing async method until the asynchronous operation represented by its operand completes.

That is, as in all languages ​​(including python), await suspends evaluation of the enclosing async method and waits for the completion of the coroutine