[Python-checkins] cpython: asyncio doc: add an example with Future
victor.stinner
python-checkins at python.org
Mon Dec 9 12:40:39 CET 2013
http://hg.python.org/cpython/rev/40e8485530bc
changeset: 87850:40e8485530bc
user: Victor Stinner <victor.stinner at gmail.com>
date: Mon Dec 09 12:40:17 2013 +0100
summary:
asyncio doc: add an example with Future
files:
Doc/library/asyncio-task.rst | 24 ++++++++++++++++++++++++
1 files changed, 24 insertions(+), 0 deletions(-)
diff --git a/Doc/library/asyncio-task.rst b/Doc/library/asyncio-task.rst
--- a/Doc/library/asyncio-task.rst
+++ b/Doc/library/asyncio-task.rst
@@ -408,3 +408,27 @@
* ``wait_task()`` stops the event loop when ``print_sum()`` is done.
+
+Example: Future and get result
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+Example combining a :class:`Future` and a :ref:`coroutine <coroutine>`::
+
+ import asyncio
+
+ @asyncio.coroutine
+ def slow_operation(future):
+ yield from asyncio.sleep(1)
+ future.set_result('Future in done!')
+
+ loop = asyncio.get_event_loop()
+ future = asyncio.Future()
+ asyncio.Task(slow_operation(future))
+ loop.run_until_complete(future)
+ print(future.result())
+ loop.close()
+
+The example waits for the completion of the future (which takes 1 second). The
+coroutine is responsible of the computation. The event loop is notified when
+the future is done (see the :meth:`Future.set_result` method).
+
--
Repository URL: http://hg.python.org/cpython
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