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Jul 1, 2024
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gh-120743: Soft deprecate os.popen() function #120744

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916a28c
gh-120743: Soft deprecate os.popen() function
vstinner Jun 19, 2024
98eab4e
Don't deprecate os.system()
vstinner Jul 1, 2024
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10 changes: 9 additions & 1 deletion Doc/library/os.rst
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Expand Up @@ -4642,6 +4642,10 @@ written in Python, such as a mail server's external command delivery program.
Use :class:`subprocess.Popen` or :func:`subprocess.run` to
control options like encodings.

.. deprecated:: 3.14
The function is :term:`soft deprecated` and should no longer be used to
write new code. The :mod:`subprocess` module is recommended instead.


.. function:: posix_spawn(path, argv, env, *, file_actions=None, \
setpgroup=None, resetids=False, setsid=False, setsigmask=(), \
Expand Down Expand Up @@ -4868,6 +4872,10 @@ written in Python, such as a mail server's external command delivery program.
.. versionchanged:: 3.6
Accepts a :term:`path-like object`.

.. deprecated:: 3.14
These functions are :term:`soft deprecated` and should no longer be used
to write new code. The :mod:`subprocess` module is recommended instead.


.. data:: P_NOWAIT
P_NOWAITO
Expand Down Expand Up @@ -4972,7 +4980,7 @@ written in Python, such as a mail server's external command delivery program.
shell documentation.

The :mod:`subprocess` module provides more powerful facilities for spawning
new processes and retrieving their results; using that module is preferable
new processes and retrieving their results; using that module is recommended
to using this function. See the :ref:`subprocess-replacements` section in
the :mod:`subprocess` documentation for some helpful recipes.

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5 changes: 5 additions & 0 deletions Doc/whatsnew/3.14.rst
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Expand Up @@ -133,6 +133,11 @@ Deprecated
as a single positional argument.
(Contributed by Serhiy Storchaka in :gh:`109218`.)

* :term:`Soft deprecate <soft deprecated>` :func:`os.popen` and
:func:`os.spawn* <os.spawnl>` functions. They should no longer be used to
write new code. The :mod:`subprocess` module is recommended instead.
(Contributed by Victor Stinner in :gh:`120743`.)


Removed
=======
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3 changes: 3 additions & 0 deletions Misc/NEWS.d/next/Library/2024-06-19-15-43-04.gh-issue-120743.CMMl2P.rst
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@@ -0,0 +1,3 @@
:term:`Soft deprecate <soft deprecated>` :func:`os.popen` and :func:`os.spawn*
<os.spawnl>` functions. They should no longer be used to write new code. The
:mod:`subprocess` module is recommended instead. Patch by Victor Stinner.