[issue37202] Future.cancelled is not set to true immediately after calling Future.cancel

[Andrew Svetlov]

Andrew Svetlov <andrew.svetlov at gmail.com> added the comment:

This is the expected behavior.

asyncio.ensure_future() returns not a future but a task for your case.
Task cancellation requires at least one context switch to finish the task.

P.S.
I suggest replacing `asyncio.ensure_future()` with `asyncio.create_task()` to avoid confusion.

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Python tracker <report at bugs.python.org>
<https://bugs.python.org/issue37202>
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