How does task switching occur in coroutines when using asyncio?

In asyncio, task (coroutine) switching occurs at the point of a wait (await), where the coroutine is paused, allowing the event loop to switch to executing another coroutine. Thus, task switching is cooperative: a coroutine voluntarily yields control, waiting for an asynchronous operation to complete, such as I/O. This allows efficient use of waiting time without blocking the thread.

Example:

import asyncio

async def task(name):
    print(f"{name} started")
    await asyncio.sleep(1)  # switch point
    print(f"{name} finished")

async def main():
    await asyncio.gather(task("A"), task("B"))

asyncio.run(main())