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-rw-r--r--Doc/library/os.rst6
1 files changed, 6 insertions, 0 deletions
diff --git a/Doc/library/os.rst b/Doc/library/os.rst
index c9d6fb2..d8bca2f 100644
--- a/Doc/library/os.rst
+++ b/Doc/library/os.rst
@@ -135,6 +135,9 @@ process and user.
``os.environ``, and when one of the :meth:`pop` or :meth:`clear` methods is
called.
+ .. versionchanged:: 3.9
+ Updated to support :pep:`584`'s merge (``|``) and update (``|=``) operators.
+
.. data:: environb
@@ -148,6 +151,9 @@ process and user.
.. versionadded:: 3.2
+ .. versionchanged:: 3.9
+ Updated to support :pep:`584`'s merge (``|``) and update (``|=``) operators.
+
.. function:: chdir(path)
fchdir(fd)