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[doc] Make subprocess.wait documentation more precise (#98700) 

[doc] Make subprocess.wait doc more precise

An active loop is only used when the `timeout` parameter is used on
POSIX.

When no timeout is used, the code calls `os.waitpid` internally (which puts
the process on a sleep status). On Windows, the internal Windows API
call accepts a timeout parameter, so that is delegated to the OS.
This commit is contained in:
Luis Pedro Coelho 2023-11-16 23:04:46 +10:00 committed by GitHub
parent 985679f05d
commit 81ab0e8a4a
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Doc/library/subprocess.rst
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@ -791,9 +791,10 @@ Instances of the :class:`Popen` class have the following methods:
.. note::
The function is implemented using a busy loop (non-blocking call and
short sleeps). Use the :mod:`asyncio` module for an asynchronous wait:
see :class:`asyncio.create_subprocess_exec`.
When the ``timeout`` parameter is not ``None``, then (on POSIX) the
function is implemented using a busy loop (non-blocking call and short
sleeps). Use the :mod:`asyncio` module for an asynchronous wait: see
:class:`asyncio.create_subprocess_exec`.
.. versionchanged:: 3.3
*timeout* was added.