https://github.com/python/cpython/commit/cdc01eaed9d19c17b4f01c3da3ca125c49f... commit: cdc01eaed9d19c17b4f01c3da3ca125c49fdffa5 branch: 3.11 author: Miss Islington (bot) <31488909+miss-islington@users.noreply.github.com> committer: miss-islington <31488909+miss-islington@users.noreply.github.com> date: 2022-09-30T10:54:12-07:00 summary: gh-87597: Document TimeoutExpired.stdout & .stderr types (GH-97685) This documents the behavior that has always been the case since timeout support was introduced in Python 3.3. (cherry picked from commit b05dd796492160c37c9e15e3882f699f411b3461) Co-authored-by: Gregory P. Smith <greg@krypto.org> files: M Doc/library/subprocess.rst diff --git a/Doc/library/subprocess.rst b/Doc/library/subprocess.rst index 43d6ffceee8f..dee5bd879db5 100644 --- a/Doc/library/subprocess.rst +++ b/Doc/library/subprocess.rst @@ -193,7 +193,10 @@ underlying :class:`Popen` interface can be used directly. .. attribute:: output Output of the child process if it was captured by :func:`run` or - :func:`check_output`. Otherwise, ``None``. + :func:`check_output`. Otherwise, ``None``. This is always + :class:`bytes` when any output was captured regardless of the + ``text=True`` setting. It may remain ``None`` instead of ``b''`` + when no output was observed. .. attribute:: stdout @@ -202,7 +205,9 @@ underlying :class:`Popen` interface can be used directly. .. attribute:: stderr Stderr output of the child process if it was captured by :func:`run`. - Otherwise, ``None``. + Otherwise, ``None``. This is always :class:`bytes` when stderr output + was captured regardless of the ``text=True`` setting. It may remain + ``None`` instead of ``b''`` when no stderr output was observed. .. versionadded:: 3.3