To cancel a running Task use the:meth:`cancel` method. Calling it

will cause the Task to throw a:exc:`CancelledError` exception into

the wrapped coroutine. If a coroutine is awaiting on aFuture

object during cancellation, theFuture object will be cancelled.

the wrapped coroutine. If a coroutine is awaiting on afuture-like

object during cancellation, theawaited object will be cancelled.

:meth:`cancelled` can be used to check if the Task was cancelled.

The method returns ``True`` if the wrapped coroutine did not

the cancellation, it needs to call:meth:`Task.uncancel` in addition

to catching the exception.

If the Task being cancelled is currently awaiting on a future-like

object, that awaited object will also be cancelled. This cancellation

propagates down the entire chain of awaited objects.

..versionchanged::3.9

Added the *msg* parameter.