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Diffstat (limited to 'Doc/library/asyncio-future.rst')
| -rw-r--r-- | Doc/library/asyncio-future.rst | 14 |
1 files changed, 10 insertions, 4 deletions
diff --git a/Doc/library/asyncio-future.rst b/Doc/library/asyncio-future.rst index ff04339..19bf8a6 100644 --- a/Doc/library/asyncio-future.rst +++ b/Doc/library/asyncio-future.rst @@ -121,6 +121,16 @@ Future Object or an exception set with :meth:`set_result` or :meth:`set_exception` calls. + .. method:: cancelled() + + Return ``True`` if the Future was *cancelled*. + + The method is usually used to check if a Future is not + *cancelled* before setting a result or an exception for it:: + + if not fut.cancelled(): + fut.set_result(42) + .. method:: add_done_callback(callback, *, context=None) Add a callback to be run when the Future is *done*. @@ -180,10 +190,6 @@ Future Object .. versionadded:: 3.7 - .. method:: cancelled() - - Return ``True`` if the Future was *cancelled*. - This example creates a Future object, creates and schedules an asynchronous Task to set result for the Future, and waits until |